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1. Copper and Molybdenum Nutrition of Crops Grown on Acid Sphagnum Peat Soil

Author:
D. C. MacKay; E. W. Chipman; U. C. Gupta
Source:
Soil Science Society of America journal 1966 v.30 no.6 pp. 755-759
ISSN:
0361-5995
Subject:
Allium cepa; Brassica oleracea; Daucus carota; Lactuca sativa; Sphagnum; Spinacia oleracea; antagonism; carrots; cauliflower; copper; lettuce; molybdenum; nutrients; nutrition; onions; pH; peat soils; plant tissues; spinach; toxicity
Abstract:
... Five crops, carrot, onion, spinach, cauliflower and lettuce (Daucus carota L., var. sativa D. C.), (Allium cepa L.), (Spinacia oleracea L.), (Brassica oleracea, var. botrytis L.), (Lactuca sativa, var. capitata L.).] were grown successively in pails of virgin sphagnum peat soil receiving 6 rates of Cu and 5 of Mo in a replicated factorial experiment. The soil was limed to slightly above pH 5.0 and ...
DOI:
10.2136/sssaj1966.03615995003000060028x

2. Studies of Water Requirements of Horticultural Crops: II. Influence of Drought at Different Growth Stages of Onion

Author:
B. R. de Lis; I. Ponce; J. B. Cavagnaro; R. M. Tizio
Source:
Agronomy journal 1967 v.59 no.6 pp. 573-576
ISSN:
0002-1962
Subject:
Allium cepa; agronomy; bulbs; drought; horticulture; onions; seedlings
Abstract:
... Two years of field experiments with onion crops (Allium cepa, L.) show that this plant is differentially sensitive to drought in each stage of its vegetative cycle. Drought at the seedling stage increases the rate of foliar emergence, produces a greater number of leaves, accelerates bulb formation by 15 days, and increases the final weight as compared with the check (no significant difference). Wh ...
DOI:
10.2134/agronj1967.00021962005900060025x

3. Estimating Leaf Area from Length Measurements for Hybrid Granex Onion

Author:
Glenn J. Hoffman
Source:
Agronomy journal 1971 v.63 no.6 pp. 948-949
ISSN:
0002-1962
Subject:
Allium cepa; climate; hybrids; leaf area; leaf length; onions; relative humidity; salinity; temperature
Abstract:
... A logarithmic linear relationship was found between leaf length and area for onion (Allium cepa L. ‘F-l Hybrid Yellow Granex’) grown from seed in sunlit climate chambers with controlled temperature and humidity. Atmospheric relative humidity and root medium salinity had no effect on the relationship. ...
DOI:
10.2134/agronj1971.00021962006300060038x

4. Internal Water Status and Water Transport in Seed Onion Plants

Author:
A. A. Millar; W. R. Gardner; S. M. Goltz
Source:
Agronomy journal 1971 v.63 no.5 pp. 779-784
ISSN:
0002-1962
Subject:
Allium cepa; environmental factors; florets; leaf water potential; leaves; onions; soil water; soil water potential; stomatal conductance; stomatal movement; umbels; water flow
Abstract:
... Water potential, transpiration rate, and stomatal resistance of the various parts of the onion (Allium cepa L.) plant were measured under field and controlled conditions. Water potentials of florets and pedicels were always lower than leaf water potentials. Water potential difference between the florets and the soil of as much as ∗9 bars were found. The greatest drop in water potential was found b ...
DOI:
10.2134/agronj1971.00021962006300050037x

5. Suppression of onion thrips with systemic-insecticide soil treatments

Author:
Getzin, L.W.
Source:
Journal of economic entomology 1973 v.66 no.4 pp. 975-977
ISSN:
0022-0493
Subject:
Delia antiqua; fensulfothion; Allium cepa; carbofuran; soil treatment; Thrips tabaci
DOI:
10.1093/jee/66.4.975

6. Ultraviolet Radiation Reflectance, Transmittance, and Absorptance by Plant Leaf Epidermises

Author:
H. W. Gausman; R. R. Rodriguez; D. E. Escobar
Source:
Agronomy journal 1975 v.67 no.5 pp. 720-724
ISSN:
0002-1962
Subject:
Agave americana; Allium cepa; Kalanchoe laciniata; Opuntia engelmannii var. lindheimeri; Peperomia obtusifolia; Yucca; leaves; onions; ozone; reflectance; stratosphere; tissues; transmittance; ultraviolet radiation; wavelengths
Abstract:
... Partial destruction of ozone in the earth's upper atmosphere (stratosphere) will increase levels of ultraviolet (UV) radiation that reach the earth's surface; consequently, plants could be exposed to harmful amounts of UV-B radiation (280 to 320 nm). The objective of our research was to characterize the reflectance, transmittance, and absorptance of UV-B radiation by leaf epidermises. Accordingly, ...
DOI:
10.2134/agronj1975.00021962006700050036x

7. Seed Coating, Precision Planting, and Sprinkler Irrigation for Optimum Stand Establishment

Author:
Frank E. Robinson; Keith S. Mayberry
Source:
Agronomy journal 1976 v.68 no.4 pp. 694-695
ISSN:
0002-1962
Subject:
Allium cepa; Beta vulgaris; Daucus carota; Lactuca sativa; agronomy; carrots; germination; lettuce; onions; planting; sandy clay loam soils; sprinkler irrigation; stand establishment; sugar beet; California
Abstract:
... The legal prohibition of the short handled hoe in California has forced a change in the conventional practice of surplus-seedling and subsequent thinning to achieve optimum stands with lettuce (Lactuca sativa L.) and sugar beet crops (Beta vulgaris L.). Precision placement of coated seed was evaluated as an alternate method of stand establishment with five crops grown on Meloland sandy clay loam w ...
DOI:
10.2134/agronj1976.00021962006800040043x

8. Onion-Seed Yield and Quality as Affected by Irrigation Management

Author:
M. J. Brown; J. L. Wright; R. A. Kohl
Source:
Agronomy journal 1977 v.69 no.3 pp. 369-372
ISSN:
0002-1962
Subject:
Allium cepa; furrow irrigation; furrows; irrigation management; pollination; scalding; seed quality; seed weight; seed yield; soil water; sprinkler irrigation; temperature; tensiometers; umbels; vigor; Idaho
Abstract:
... The effects of soil moisture, sprinkler irrigation, and misting (5 min at 30-min intervals) on hybrid onion-seed (Allium cepa L.) production were evaluated at Kimberly, Idaho. Sprinkling and misting treatments were included to determine if sprinkler irrigation could be used for onion-seed production, and if evaporative cooling (misting) would alleviate the scalding of umbels at excessively high te ...
DOI:
10.2134/agronj1977.00021962006900030009x

9. Onion conditioning pertaining to larval preference, survival and rate of development in delia (=hylemya) antiqua

Author:
G. Zurlini; A. S. Robinson
Source:
Entomologia experimentalis et applicata 1978 v.23 no.3 pp. 279-286
ISSN:
0013-8703
Subject:
Allium cepa; Delia; larvae; onions
Abstract:
... Using onion conditioned by Delia (=Hylemya) antiqua larvae for four different periods of time and larvae of four different ages, the effect of conditioned or fresh onion on larval preference was studied. It was shown that of the sixteen combinations tested, nine larval groups showed a preference for conditioned onion, five showed no preference and two showed a preference for fresh onion. Significa ...
DOI:
10.1111/j.1570-7458.1978.tb02746.x

10. Potassium Uptake by Onion Roots Characterized by Potassium/Rubidium Ratio

Author:
V. C. Baligar; S. A. Barber
Source:
Soil Science Society of America journal 1978 v.42 no.4 pp. 618-622
ISSN:
0361-5995
Subject:
Allium cepa; Zea mays; corn; exchangeable potassium; mass flow; onions; potassium; root hairs; rubidium; soil
Abstract:
... A common belief is that plant roots absorb cations from the solution phase of the soil. Experiments with corn (Zea mays L.) using K/Rb ratio to evaluate the source of K and Rb absorbed indicated the plant roots absorbed these ions in the ratio of exchangeable K and Rb. The objective of this research was to study the source of K and Rb absorbed from soil by onion (Allium cepa) roots since they do n ...
DOI:
10.2136/sssaj1978.03615995004200040017x

11. Comparison of the onion plant (allium cepa) and onion tissue culture: i. alliinase activity and flavour precursor compounds

Author:
C. SELBY; I. J. GALPIN; H. A. COLLIN
Source:
new phytologist 1979 v.83 no.2 pp. 351-359
ISSN:
0028-646X
Subject:
Allium cepa; amino acid metabolism; amino acids; bulbs; callus; crushing; enzymes; flavor; onions; tissue culture
Abstract:
... The system for flavour production in the onion consists of the enzyme alliinase and the flavour precursors, the S‐alkyl‐L‐cysteine sulphoxides. Flavour production in the onion and in the callus were compared by looking at each part of the system in turn. Measurement of the specificity and Kₘ values of the alliinase from onion bulb and callus showed the enzymes to be identical. The total amino acid ...
DOI:
10.1111/j.1469-8137.1979.tb07459.x

12. Contribution of Mycorrhizae to P Nutrition of Crops Growing on an Oxisol

Author:
R. S. Yost; R. L. Fox
Source:
Agronomy journal 1979 v.71 no.6 pp. 903-908
ISSN:
0002-1962
Subject:
Allium cepa; Brassica; Eutrustox; Glycine max; Manihot esculenta; Stylosanthes hamata; Vigna unguiculata; absorption; agronomy; fumigation; mycorrhizae; nutrient uptake; phosphates; plant growth
Abstract:
... Most plant species, including the major crops, form symbiotic mycorrhizal associations between their roots and certain fungi which influence nutrient uptake, especially P, from infertile soils. HOW well-supplied the phosphate must be before mycorrhizae cease to enhance P uptake is not known; nor have the effects of mycorrhizae on external P requirements of crops been adequately determined in the f ...
DOI:
10.2134/agronj1979.00021962007100060002x

13. Onion Response to Lime on Acid Histosols as Affected by Ca/Mg Ratios

Author:
W. van Lierop; Y. A. Martel; M. P. Cescas
Source:
Soil Science Society of America journal 1979 v.43 no.6 pp. 1172-1176
ISSN:
0361-5995
Subject:
Allium cepa; Histosols; acid soils; calcium; crop yield; hydrochloric acid; liming; magnesium; onions; sulfuric acid; vegetable growing
Abstract:
... The objectives of this work were to determine critical ratios and concentrations of Ca and Mg in Histosols as related to onion (Allium cepa L.) growth and composition. The molar Ca/Mg ratios extracted from soils were related to those found in onion and indicated that onion assimilated Mg more easily than Ca. Although the upper critical Ca/Mg ratio was not found, yields decreased rapidly as extract ...
DOI:
10.2136/sssaj1979.03615995004300060023x

14. Response of Onions to P Placement

Author:
J. R. Mulkey; E. L. Albach; F. J. Dainello
Source:
Agronomy journal 1979 v.71 no.6 pp. 1037-1040
ISSN:
0002-1962
Subject:
Allium cepa; Calciustolls; onions; phosphorus; phosphorus fertilizers; plant development; planting; seedling growth; seedlings; vigor
Abstract:
... Considerable variation in seedling size, vigor, and plant development occurs in onions (Allium cepa L.) where phosphate fertilizers are surface-applied and incorporated prior to planting. Our objective was to determine the influence of P rates and placement techniques on the growth and development of fall-seeded onions. During the fall of 1975 and 1977, two rates of P (21.8 and 43.6 kg/ha) were ba ...
DOI:
10.2134/agronj1979.00021962007100060034x

15. Improved Growth of Onion and Bell Pepper in Saline Soils by Two Vesicular-Arbuscular Mycorrhizal Fungi

Author:
Marc C. Hirrel; J. W. Gerdemann
Source:
Soil Science Society of America journal 1980 v.44 no.3 pp. 654-655
ISSN:
0361-5995
Subject:
Allium cepa; Capsicum annuum; Gigaspora margarita; Glomus; mycorrhizal fungi; onions; saline soils; salinity; salt tolerance; sweet peppers; vesicular arbuscular mycorrhizae
Abstract:
... The effect of 5 levels of salinity on the growth of onions (Allium cepa L. cv. ‘Early Yellow Globe’) and bell peppers (Capsicum annuum L. cv. ‘California Wonder’) inoculated with the mycorrhizal fungi, Glomus fasciculatus or Gigaspora margarita, was compared to uninoculated nonmycorrhizal controls. In soils with saturation extracts (ECe) of 1, 3, 4, 6, and 12 mmho/cm, mycorrhizal plants consistent ...
DOI:
10.2136/sssaj1980.03615995004400030046x

16. Controlled Cooling of Onion Umbels by Periodic Sprinkling

Author:
J. L. Wright; J. L. Stevens; M. J. Brown
Source:
Agronomy journal 1981 v.73 no.3 pp. 481-490
ISSN:
0002-1962
Subject:
Allium cepa; agronomy; air temperature; bulbs; cooling; field experimentation; florets; humidity; hybrids; onions; pollination; silt loam soils; sprinkler irrigation; umbels; wind speed; Idaho
Abstract:
... Low onion (Allium cepa L.) seed yields frequently occur without obvious reasons, particularly with hybrid varieties. Solutions to the problem need to be found to insure seed for bulb onion production. Water and temperature stress in the umbel may be factors during hot, dry, sunny weather. We investigated the relationship of umbel temperature to ambient and umbel conditions and the effects of perio ...
DOI:
10.2134/agronj1981.00021962007300030021x

17. Influence of Mycorrhizal Fungi on the Mineral Nutrition and Yield of Onion in Saline Soil

Author:
J. C. Ojala; W. M. Jarrell; J. A. Menge; E. L. V. Johnson
Source:
Agronomy journal 1983 v.75 no.2 pp. 255-259
ISSN:
0002-1962
Subject:
Allium cepa
Abstract:
... In a number of studies, salt-affected plants have been found to contain lower P concentrations than non-salinized control plants. This study was performed to evaluate the ability of two vesicular-arbuscular mycorrhizal fungi (VAM) to improve the yield and salt tolerance of onion (Allium cepa L. var. Burpee hybrid 5276) by facilitating P uptake from a saline soil. Onion was grown in a Delhi loamy s ...
DOI:
10.2134/agronj1983.00021962007500020023x

18. Spécificité des substances non volatiles des allium responsables de la ponte de la teigne du poireau, acrolepiopsis assectella (lepidoptera)

Author:
AUGER, J.; THIBOUT, E.
Source:
Entomologia experimentalis et applicata 1983 v.34 no.1 pp. 71-77
ISSN:
0013-8703
Subject:
Acrolepiopsis assectella; Alliaria petiolata; Allium cepa; Allium porrum; Apiaceae; Brassica napus; Brassica oleracea var. capitata; Iris (Iridaceae); Tulipa; bioassays; cabbage; females; garlic; host plants; leaves; leeks; methanol; onions; organic sulfur compounds; oviposition; plant extracts
Abstract:
... SUMMARY: Specificity of non-volatile compounds eliciting leek moth (Acrolepiopsis assectellaj oviposition behaviour Leek moth females oviposit only when in contact with plants of the genus Allium (Liliaceae). The possible reasons for this specific stimulation were investigated using extracts of different plant species. The bioassay with filter paper and isolated mated females is described. Methano ...
DOI:
10.1111/j.1570-7458.1983.tb03292.x

19. A glasshouse screening method to assess resistance in onions to damage by onion fly (Delia antiqua) larvae

Author:
Soni, S.K.; Freeman, G.H.; Ellis, P.R.
Source:
Annals of applied biology 1984 v.105 no.3 pp. 565-573
ISSN:
0003-4746
Subject:
Allium cepa; pest resistance; Delia antiqua; greenhouses; methodology
DOI:
10.1111/j.1744-7348.1984.tb03083.x

20. Daily mitotic cycle in the common onion, Allium cepa

Author:
Stephens, C.E.
Source:
Cytologia 1984 v.49 no.4 pp. 679-684
ISSN:
0011-4545
Subject:
Allium cepa; mitosis; regression analysis
DOI:
10.1508/cytologia.49.679

21. Laboratory tests for leaf resistance to Botrytis squamosa in onions

Author:
Currah, L.; Maude, R.B.
Source:
Annals of applied biology 1984 v.105 no.2 pp. 277-283
ISSN:
0003-4746
Subject:
Allium cepa; disease resistance; Botrytis; leaves
DOI:
10.1111/j.1744-7348.1984.tb03051.x

22. Perfusion of onion root xylem vessels: a method and some evidence of control of the pH of the xylem sap

Author:
Clarkson, D.T.; Williams, L.; Hanson, J.B.
Source:
Planta 1984 v.162 no.4 pp. 361-369
ISSN:
0032-0935
Subject:
Allium cepa; roots; xylem; sap; pH
DOI:
10.1007/BF00396749
PubMed:
24253171

23. Arthropod parasitoids and predators of the onion maggot (Diptera: Anthomyiidae) in Southwestern Ontario

Author:
Tomlin, A.D.; Miller, J.J.; Harris, C.R.; Tolman, J.H.
Source:
Journal of economic entomology 1985 v.78 no.4 pp. 975-981
ISSN:
0022-0493
Subject:
Allium cepa; Delia antiqua; biological control; predators; Ontario
DOI:
10.1093/jee/78.4.975

24. Calcium movement, graviresponsiveness and the structure of columella cells and columella tissues in roots of Allium cepa L

Author:
Moore, R.
Source:
Annals of botany 1985 v.56 no.2 pp. 173-187
ISSN:
0305-7364
Subject:
Allium cepa; calcium; roots; ultrastructure
Abstract:
... Roots of Allium cepa L. cv. Yellow are differentially responsive to gravity. Long (e.g. 40 mm) roots are strongly graviresponsive, while short (e.g. 4 mm) roots are minimally responsive to gravity. Although columella cells of graviresponsive roots are larger than those of nongraviresponsive roots, they partition their volumes to cellular organelles similarly. The movement of amyloplasts and nuclei ...
DOI:
10.1093/oxfordjournals.aob.a087001

25. Carbohydrates of Alium. VII. Characteristics of the polysaccharides of the skin of Allium cepa

Author:
Khozhaeva, M.A.; Khasanov, M.; Kondratenko, E.S.; Umarov, A.U.
Source:
Chemistry of natural compounds 1985 v.21 no.1 pp. 12-14
ISSN:
0009-3130
Subject:
Allium cepa; polysaccharides; chemical constituents of plants
DOI:
10.1007/BF00574239

26. Carbohydrates of Allium. IX. Carbohydrate components of Allium cepa

Author:
Khodzhaeva, M.A.; Rashkes, Ya.V.; Kondratenko, E.S.; Rakhimov, D.A.
Source:
Chemistry of natural compounds 1985 v.21 no.2 pp. 162-165
ISSN:
0009-3130
Subject:
Allium cepa; carbohydrates; bulbs; chemical composition
DOI:
10.1007/BF00714902

27. Changes in dye coupling of stomatal cells of Allium and Commelina demonstrated by microinjection of Lucifer yellow

Author:
Palevitz, B.A.; Hepler, P.K.
Source:
Planta 1985 v.164 no.4 pp. 473-479
ISSN:
0032-0935
Subject:
Allium cepa; Commelina communis; stomata; cell structures
DOI:
10.1007/BF00395962
PubMed:
24248219

28. Electrophoretic analysis of Allium alien addition lines

Author:
Peffey, E.B.; Corgan, J.N.; Horak, K.E.; Tanksley, S.D.
Source:
Theoretical and applied genetics 1985 v.71 no.2 pp. 176-184
ISSN:
0040-5752
Subject:
Allium cepa; Allium fistulosum; electrophoresis; isozymes; plant breeding; meiosis; triploidy
DOI:
10.1007/BF00252053
PubMed:
24247380

29. Elements in major raw agricultural crops in the United States. 3. Cadmium, lead, and eleven other elements in carrots, field corn, onions, rice, spinach, and tomatoes

Author:
Wolnik, K.A.; Fricke, F.L.; Capar, S.G.; Meyer, M.W.; Satzger, R.D.; Bonnin, E.; Gaston, C.M.
Source:
Journal of agricultural and food chemistry 1985 v.33 no.5 pp. 807-811
ISSN:
0021-8561
Subject:
Daucus carota; Zea mays; Allium cepa; Oryza sativa; Spinacia oleracea; Solanum lycopersicum var. lycopersicum; trace elements
DOI:
10.1021/jf00065a010

30. Evaluation of the infectivity and effectiveness of indigenous vesicular--arbuscular fungal populations in some agricultural soils in Burgundy

Author:
Gianinazzi-Pearson, V.; Gianinazzi, S.; Trouvelot, A.
Source:
Canadian journal of botany 1985 v.63 no.9 pp. 1521-1524
ISSN:
0008-4026
Subject:
soil inoculation; soil analysis; Allium cepa; Trifolium pratense; mycorrhizae; agricultural land; France
DOI:
10.1139/b85-210

31. Greenhouse technique to evaluate onion resistance to pink root

Author:
Netzer, D.; Rabinowitch, H.D.; Weintal, C.
Source:
Euphytica 1985 v.34 no.2 pp. 385-391
ISSN:
0014-2336
Subject:
Allium fistulosum; cultivars; assays; Allium cepa; greenhouse experimentation; disease resistance; Pyrenochaeta terrestris
DOI:
10.1007/BF00022933

32. Influence of crop growth on ionic equilibria, selectivity and diffusion of cations in soil

Author:
Baligar, V.C.
Source:
Communications in soil science and plant analysis 1985 v.16 no.2 pp. 163-178
ISSN:
0010-3624
Subject:
soil chemistry; Zea mays; Allium cepa; Triticum aestivum
DOI:
10.1080/00103628509367594

33. Influence of unharvested, cull-pile, and volunteer onions on populations of onion maggot (Diptera: Anthomyiidae)

Author:
Finch, S.; Eckenrode, C.J.
Source:
Journal of economic entomology 1985 v.78 no.3 pp. 542-546
ISSN:
0022-0493
Subject:
Allium cepa; Delia antiqua; plant residues
DOI:
10.1093/jee/78.3.542

34. Pesticide-induced mortality of natural enemies of the onion maggot, Delia antiqua [Dip.:Anthomyiidae]

Author:
Carruthers, R.I.; Whitfield, G.H.; Haynes, D.L.
Source:
Entomophaga 1985 v.30 no.2 pp. 151-161
ISSN:
0013-8959
Subject:
Allium cepa; Delia antiqua; pesticides; mortality; parasites
DOI:
10.1007/BF02372248

35. Rate of P uptake by onions compared with rate of pyrophosphate hydrolysis in organic soils

Author:
Parent, L.E.; Mackenzie, A.F.; Perron, Y.
Source:
Canadian journal of plant science 1985 v.65 no.4 pp. 1091-1095
ISSN:
0008-4220
Subject:
Allium cepa; phosphorus; nutrient uptake; pyrophosphates; hydrolysis
DOI:
10.4141/cjps85-142

36. Response of onion (Allium cepa) to oxyfluorfen during early seedling development

Author:
Akey, W.C.; Souza Machado, V.
Source:
Canadian journal of plant science 1985 v.65 no.2 pp. 357-362
ISSN:
0008-4220
Subject:
Allium cepa; onions; oxyfluorfen
DOI:
10.4141/cjps85-050

37. Sugar uptake into Allium cepa leaf tissue: an integrated approach

Author:
Wilson, C.; Oross, J.W.; Lucas, W.J.
Source:
Planta 1985 v.164 no.2 pp. 227-240
ISSN:
0032-0935
Subject:
Allium cepa; leaves; sugars; phloem loading
DOI:
10.1007/BF00396086
PubMed:
24249565

38. Susceptibility of the onion maggot, Delia antiqua (Diptera: Anthomyiidae), to the mycotoxin destruxin E

Author:
Poprawski, T.J.; Robert, P.H.; Maniania, N.K.
Source:
Canadian entomologist 1985 v.117 no.6 pp. 801-802
ISSN:
0008-347X
Subject:
Allium cepa; Delia antiqua; insect control; mycotoxins; biological resistance
DOI:
10.4039/Ent117801-6

39. The influence of seedling size and carbohydrate status and of photon flux density during vernalization on inflorescence initiation in onion (Allium cepa L.)

Author:
Brewster, J.L.
Source:
Annals of botany 1985 v.55 no.3 pp. 403-414
ISSN:
0305-7364
Subject:
Allium cepa; cultivars; seedlings; light intensity; carbohydrates; vernalization
Abstract:
... Experiments were done in controlled conditions to investigate the relationship of plant weight, leaf number and raising conditions to inflorescence initiation in onion seedlings. Above a shoot dry weight of 0.06 g the spring-sown cv. Rijnsburger could initiate inflorescences, whereas the autumn-sown cv. Senshyu semi-globe Yellow needed to be heavier than 0.45 g. Plants raised at a photon flux dens ...
DOI:
10.1093/oxfordjournals.aob.a086919

40. The relationship between lateral-root distribution and endodermis and pericycle cell length in Allium cepa L. adventitious roots

Author:
Lloret, P.G.; Vidal, M.R.; Casero, P.J.; Navascues, J.
Source:
Annals of botany 1985 v.56 no.2 pp. 189-195
ISSN:
0305-7364
Subject:
Allium cepa; roots; cell growth
Abstract:
... Endodermis and pericycle cell lengths were measured in intact and decapitated adventitious roots of Allium cepa L. Decapitation had no effect on cell length in mature portions of the root, although it affected more immature cells, impeding normal elongation. Cell length shows a characteristic pattern in different zones of the adventitious root: cells in the medial region were more markedly elongat ...
DOI:
10.1093/oxfordjournals.aob.a087002

41. A study of the relationship between seedling characters and rate of germination within a seed lot

Author:
Finch-Savage, W.E.
Source:
Annals of applied biology 1986 v.108 no.2 pp. 441-444
ISSN:
0003-4746
Subject:
Allium porrum; Allium cepa; Brassica oleracea; germination; seedling emergence
DOI:
10.1111/j.1744-7348.1986.tb07667.x

42. Aggregation of a Silty Clay Loam Soil by Mycorrhizal Onion Roots

Author:
R. S. Thomas; S. Dakessian; R. N. Ames; M. S. Brown; G. J. Bethlenfalvay
Source:
Soil Science Society of America journal 1986 v.50 no.6 pp. 1494-1499
ISSN:
0361-5995
Subject:
Allium cepa; Glomus macrocarpum; endophytes; host plants; hyphae; mycorrhizal fungi; onions; permeability; planting; regression analysis; rhizosphere; roots; silty clay loam soils; soil structure; vesicular arbuscular mycorrhizae; water content
Abstract:
... Onion plants (Allium cepa L.) inoculated in the root zone with a vesicular-arbuscular mycorrhizal (VAM) fungus, or left uninoculated, were grown in potted soil for 230 d to determine the influence of the VAM fungus (Glomus macrocarpum Tul. and Tul.) on soil structure. The silty clay loam soil was maintained at a moisture content between 25 and 30%. Paired inoculated (+M) and uninoculated (−M) plan ...
DOI:
10.2136/sssaj1986.03615995005000060023x

43. Alkaline inorganic pyrophosphatase and starch synthesis in amyloplasts

Author:
Gross, P.; Ap Rees, T.
Source:
Planta 1986 v.167 no.1 pp. 140-145
ISSN:
0032-0935
Subject:
Arum maculatum; Glycine max; Allium cepa; starch; synthesis; pyrophosphatases
DOI:
10.1007/BF00446381
PubMed:
24241744

44. Analysis of growth components in Allium roots

Author:
Carmona, M.J.; Cuadrado, A.
Source:
Planta 1986 v.168 no.2 pp. 183-189
ISSN:
0032-0935
Subject:
Allium cepa; roots; mathematical models
DOI:
10.1007/BF00402962
PubMed:
24232020

45. Appraisal of current strategies for controlling onion maggot (Diptera: Anthomyiidae) in New York State

Author:
Finch, S.; Cadoux, M.E.; Eckenrode, C.J.; Spittler, T.D.
Source:
Journal of economic entomology 1986 v.79 no.3 pp. 736-740
ISSN:
0022-0493
Subject:
Allium cepa; Delia antiqua; chlorpyrifos; insect control; soil treatment; pesticide application; pest resistance; plant damage; parathion; New York
DOI:
10.1093/jee/79.3.736

46. Bulb development in onion (Allium cepa L.). I. Effects of plant density and sowing date in field conditions

Author:
Mondal, M.F.; Brewster, J.L.; Morris, G.E.L.; Butler, H.A.
Source:
Annals of botany 1986 v.58 no.2 pp. 187-195
ISSN:
0305-7364
Subject:
Allium cepa; cultivars; bulbs; plant density; spatial distribution; plant competition; sowing date; England
Abstract:
... Early and later maturing cultivars of both spring- and autumn-sown onions were sown on two dates at 25, 100 and400 plants m−2. High levels of nutrients and irrigation were applied. Both high plant density and early sowing advanced the date at which bulb scales, rather than leaf blades, were initiated at the shoot apex and so advanced the date of maturity by up to 46 d. The later maturing spring-so ...
DOI:
10.1093/oxfordjournals.aob.a087197

47. Bulb development in onion (Allium cepa L.). II. The influence of red : far-red spectral ratio and of photon flux density

Author:
Mondal, M.F.; Brewster, J.L.; Morris, G.E.L.; Butler, H.A.
Source:
Annals of botany 1986 v.58 no.2 pp. 197-206
ISSN:
0305-7364
Subject:
Allium cepa; cultivars; light intensity; red light; far-red light; carbohydrates; plant development
Abstract:
... Bulb development was followed in four onion cultivars growing in controlled environments under 17 h days in factorial combinations of photon-flux densities (PFD) of 111 and 333 μmol m−2 s−1 with red: far-red spectral ratios (R : FR) of 2.88 and 1.41. A PFD of 111with R : FR of 0.86 was used in a second experiment. The lower the R : FR or the higher the PFD the higher the mean bulbing ratio and the ...
DOI:
10.1093/oxfordjournals.aob.a087198

48. Bulb development in onion (Allium cepa L.). III. Effects of the size of adjacent plants, shading by neutral and leaf filters, irrigation and nitrogen regime and the relationship between the red : far-red spectral ratio in the canopy and leaf area index

Author:
Mondal, M.F.; Brewster, J.L.; Morris, G.E.L.; Butler, H.A.
Source:
Annals of botany 1986 v.58 no.2 pp. 207-219
ISSN:
0305-7364
Subject:
Allium cepa; leaf area index; spatial distribution; plant density; plant competition; red light; far-red light; nitrogen; irrigation; artificial shade; England
Abstract:
... Field experiments were done to investigate why onion crops with a high leaf area index (LAI) initiate bulb scales and mature sooner than those with a low LAI. When small plants were grown either mixed with large plants or in pure stands, those in the mixed stands initiated bulb scales earlier than those in pure stands. The timing of bulb development therefore depended on the size of neighbouring p ...
DOI:
10.1093/oxfordjournals.aob.a087199

49. Bulb development in onion (Allium cepa L.). IV. Influence on yield of radiation interception, its efficiency of conversion, the duration of growth and dry-matter partitioning

Author:
Brewster, J.L.; Mondal, F.M.; Morris, G.E.L.
Source:
Annals of botany 1986 v.58 no.2 pp. 221-233
ISSN:
0305-7364
Subject:
Allium cepa; bulbs; solar radiation; crop yield; dry matter accumulation; water stress; temperature; plant density; irrigation; light; England
Abstract:
... onion crops were correlated with the total solar radiation intercepted by the leaf canopy. The mean efficiency of conversion of intercepted radiation to dry-matter was 1.58 g MJ−1. However, efficiencies were significantly different between seasons and in two years out of three they were lower for spring-sown crops than for autumn-sown crops. The lower efficiencies coincided with periods of high me ...
DOI:
10.1093/oxfordjournals.aob.a087200

50. Cell wall thickening of the xylem tracheary elements in different zones of the adventitious root of Allium cepa L

Author:
Llorett, P.G.; Casero, P.J.; Vidal, M.R.; Abadia-Fenoll, F.; Navascues, J.
Source:
Annals of botany 1986 v.57 no.4 pp. 565-575
ISSN:
0305-7364
Subject:
Allium cepa; xylem; cell walls; plant development; roots
Abstract:
... Cell wall thickness of the xylem tracheary elements was measured in the proto- and metaxylem of the Allium cepa L. adventitious root. Measurements were taken in root fragments of known age (1, 3, 5, 7 and 9 d) located in either the basal or medio-apical zone. Tracheary elements in the protoxylem matured within a shorter period of time than those in the metaxylem. Final cell wall thickness was grea ...
DOI:
10.1093/oxfordjournals.aob.a087137