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You searched for: Journal Annals of botany Remove constraint Journal: Annals of botany Publication Year 1988 Remove constraint Publication Year: 1988 Source 1988 v.61 no.2 Remove constraint Source: 1988 v.61 no.2
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1. Carbon and nutrient allocation in Elymus farctus seedlings after burial with sand

Author:
Harris, D.; Davy, A.J.
Source:
Annals of botany 1988 v.61 no.2 pp. 147-157
ISSN:
0305-7364
Subject:
Thinopyrum junceum; seedlings; sand; carbon dioxide; gas exchange
Abstract:
... We report physiological aspects of the response of seedlings of the strandline grass Elymus farctus to short-term burial with sand. Seedlings were buried at the two-leaf stage for one week and compared with non-buried controls - before, during and after burial. Photosynthetic CO2 uptake was measured by infrared gas analysis and carbon translocation from the youngest expanded leaf was monitored aft ...
DOI:
10.1093/oxfordjournals.aob.a087537

2. Composition, degradation and utilization of endosperm during germination in the oil palm (Elaeis guineensis Jacq.)

Author:
Alang, Z.C.; Moir, G.F.J.; Jones, L.H.
Source:
Annals of botany 1988 v.61 no.2 pp. 261-268
ISSN:
0305-7364
Subject:
Elaeis guineensis; endosperm; germination; chemical constituents of plants
Abstract:
... The insoluble carbohydrate and lipid fractions, and α-D-galactosidase, β-D-mannosidase and isocitrate lyase activities were studied in the various tissues of oil palm (Elaeis guineensis Jacq.) kernels prior to and during germination. In ungerminated kernels insoluble carbohydrate and lipid constituted 36 and 47% of endosperm dry weight respectively. During germination the thick endosperm cell wall ...
DOI:
10.1093/oxfordjournals.aob.a087553

3. Cytokinin as an inducer of vitrification in melon

Author:
Leshem, B.; Shaley, D.P.; Izhar, S.
Source:
Annals of botany 1988 v.61 no.2 pp. 255-260
ISSN:
0305-7364
Subject:
Cucumis melo; cytokinins; plant diseases and disorders; culture media
Abstract:
... Development of vitrification has been followed in melon shoot tips cultured on solid and liquid media which contained growth factors in various concentrations. Cytokinin was found to be the primary inducer, without which vitrification did not occur in spite of the presence in the culture of other accepted inducers. Spontaneous vitrification appeared on non-inductive media but in a low percentage. ...
DOI:
10.1093/oxfordjournals.aob.a087552

4. Direct test for altered gas exchange rates in water-stressed soybean nodules

Author:
Davis, L.C.; Imsande, J.
Source:
Annals of botany 1988 v.61 no.2 pp. 169-177
ISSN:
0305-7364
Subject:
Glycine max; gas exchange; root nodules; water stress; acetylene
Abstract:
... Water stress usually lowers the nitrogenase activity of soybean root nodules. This loss in activity might result from an increased barrier to nodular gas exchange, from a general reduction in biochemical function, or both. To test for the possibility of an increased barrier to gas diffusion, we measured the apparent lag time for initiation of acetylene reduction by intact soybean plants, both befo ...
DOI:
10.1093/oxfordjournals.aob.a087539

5. Effect of inorganic phosphate on the biosynthesis of purine and pyrimidine nucleotides in suspension-cultured cells of Catharanthus roseus

Author:
Ashihara, H.; Li, X.N.; Ukaji, T.
Source:
Annals of botany 1988 v.61 no.2 pp. 225-232
ISSN:
0305-7364
Subject:
Catharanthus roseus; biosynthesis; purines; phosphates; pyrimidine nucleotides; cell suspension culture
Abstract:
... The levels of purine and pyrimidine nucleotides in suspension cultures of Catharanthus roseus were determined 24 h after stationary-phase cells were transferred to fresh complete (' + Pi') or phosphatedeficient ('—Pi') Murashige-Skoog medium. The levels of ATP, GTP, UTP and CTP were from approx. 3 to 5-fold greater in the cells grown in ' +Pi* medium than in the cells grown in ' — Pi' medium. The ...
DOI:
10.1093/oxfordjournals.aob.a087547

6. Effects of low oxygen on photosynthesis, translocation and growth in green pepper (Capsicum annuum)

Author:
Priestley, C.A.; Treharne, K.J.; Lenz, F.
Source:
Annals of botany 1988 v.61 no.2 pp. 159-167
ISSN:
0305-7364
Subject:
Capsicum annuum; oxygen; photosynthesis; growth chambers; translocation (plant physiology)
Abstract:
... Green pepper (Capsicum annuum cv. Bell Boy) plants were exposed in chambers to low (2%) oxygen and controlled carbon dioxide concentrations. Vegetative and fruiting plants showed short-term increases in net photosynthesis in low oxygen or elevated carbon dioxide (up to 900 μl CO2 l−1). Photosynthesis of young vegetative plants increased in low oxygen in the short-term but there was no long-term be ...
DOI:
10.1093/oxfordjournals.aob.a087538

7. Histochemical study of photoperiodic and low temperature effects on floral induction of Spinacia oleracea

Author:
El Toukhi, F.M.; Auderset, G.; Gahan, P.B.; Greppin, H.
Source:
Annals of botany 1988 v.61 no.2 pp. 237-241
ISSN:
0305-7364
Subject:
Spinacia oleracea; flowering; temperature; photoperiod; histochemistry
Abstract:
... Shoot apices of Spinacia oleracea plants have been induced to flower either by: (a) subjecting leaves to 24 h long day, or (b) exposure to a short photoperiod but displaced by 8 h (displaced short day) in the usual 24 h short-day cycle, or (c) exposure to low temperature (5 °C) during the dark period of the normal short day. A quantitative cytochemical assay of pentose phosphate pathway activity d ...
DOI:
10.1093/oxfordjournals.aob.a087549

8. Impaired anthocyanin production in barbiturate-treated Zea mays seedlings

Author:
Kordan, H.A.; Rengel, Z.
Source:
Annals of botany 1988 v.61 no.2 pp. 221-223
ISSN:
0305-7364
Subject:
Zea mays; seedlings; anthocyanins; roots; shoots; barbiturates
Abstract:
... Anthocyanin production was impaired in both roots and shoots of Zea mays seedlings germinated on 1 and 2 mM concentrations of four barbiturates having different lipid/aqueous partition coefficients. The severity of impaired anthocyanin production was greater in those seedlings treated with the higher lipid soluble barbiturates irrespective of the concentrations used. Indirect evidence is presented ...
DOI:
10.1093/oxfordjournals.aob.a087546

9. In vitro transformation of root meristem to shoot and plantlets in Vanilla planifolia

Author:
Philip, V.J.; Nainar, S.A.Z.
Source:
Annals of botany 1988 v.61 no.2 pp. 193-199
ISSN:
0305-7364
Subject:
organogenesis; Vanilla planifolia; root meristems; shoots
Abstract:
... A study is reported of histogenesis and organogenesis during the processes leading up to plantlet formation in tip cultures of aerial roots of Vanilla planifolia. Young root tips excised from aerial roots, less than 15 cm long, when cultured in liquid MS medium containing IAA and KN showed gravitropic response until cap lysis began. With the collapse of the distal half of the cap, the cells of the ...
DOI:
10.1093/oxfordjournals.aob.a087542

10. Limitations on the analysis of acetylene reduction by soybean at low levels of acetylene

Author:
Davis, L.C.
Source:
Annals of botany 1988 v.61 no.2 pp. 179-183
ISSN:
0305-7364
Subject:
nitrogenase; enzyme activity; Glycine max; acetylene
Abstract:
... The analysis of acetylene reduction at low concentrations of acetylene involves a number of assumptions and both technical and kinetic complexities. The major difficulty in converting acetylene reduction rates to apparent N2 reduction rates is determining the Km for acetylene in the presence of N2. This substrate competition is dominant over diffusion limitation effects, but both introduce equival ...
DOI:
10.1093/oxfordjournals.aob.a087540

11. Long-term metabolism of [14C]sugars in stored potatoes

Author:
Oparka, K.J.; Davies, H.V.; Prior, D.A.M.
Source:
Annals of botany 1988 v.61 no.2 pp. 185-191
ISSN:
0305-7364
Subject:
potatoes; carbon; isotopes; sucrose; glucose; fructose; postharvest physiology; storage
Abstract:
... [14C]Sucrose, [14C]glucose and [14C]fructose were introduced into potato tubers held at 10 °C and the redistribution of label chased over a 65 d period in storage. Respiratory losses were identical in all treatments, as was the partitioning of 14C between soluble and insoluble forms. Sucrose was the predominant labelled sugar in the tubers after 20 h, regardless of the original [14C]sugar introduc ...
DOI:
10.1093/oxfordjournals.aob.a087541

12. Ovule fertilization and seed number per pod determination in oil seed rape (Brassica napus)

Author:
Pechan, P.M.
Source:
Annals of botany 1988 v.61 no.2 pp. 201-207
ISSN:
0305-7364
Subject:
fertilization (reproduction); Brassica napus; ovules; pods; seeds
Abstract:
... Ovule fertilization in relation to seed number determination in spring rapeseed, Brassica napus var. Maris Haplana, was investigated. Failure of fertilization was found to be the major factor limiting the number of seeds per pod in both the basally and apically located pods on the terminal inflorescence. Sufficient pollen germination on a stigma did not guarantee full seed set and even when pollen ...
DOI:
10.1093/oxfordjournals.aob.a087543

13. Phytolith analysis as a means of plant identification: Arundo donax and Phragmites communis

Author:
Ollendorf, A.L.; Mulholland, S.C.; Rapp, G. Jr.
Source:
Annals of botany 1988 v.61 no.2 pp. 209-214
ISSN:
0305-7364
Subject:
Arundo donax; Phragmites australis; taxonomy
Abstract:
... Despite the wide range of research that has involved phytolith analysis, including studies of palaeosols and palaeovegetation, palaeoenvironmental reconstruction, and archaeological interpretation, examples of applications to the systematic identification of modern plants are scarce, and are not applied rigorously. The present study suggests that phytolith analysis may be useful for identification ...
DOI:
10.1093/oxfordjournals.aob.a087544

14. Production of plantlets of Shorea roxburghii G. Don. from embryonic axes cultured in vitro

Author:
Scott, E.S.; Rao, A.N.; Loh, C.S.
Source:
Annals of botany 1988 v.61 no.2 pp. 233-236
ISSN:
0305-7364
Subject:
Shorea; shoots; tissue culture
Abstract:
... Development of axillary shoots was induced in embryonic axes of the dipterocarp Shorea roxburghii G. Don. cultured on a modified MS medium containing 6-benzyl-aminopurine (BAP) at an optimum concentration of 5 mg I−1. Excised axillary shoots were used in multiplication and rooting experiments. Vigorous root development occurred in shoots supported on filter paper bridges in liquid medium containin ...
DOI:
10.1093/oxfordjournals.aob.a087548

15. Representing cumulative germination. 1. A critical analysis of single-value germination indices

Author:
Brown, R.F.; Mayer, D.G.
Source:
Annals of botany 1988 v.61 no.2 pp. 117-125
ISSN:
0305-7364
Subject:
Aristida; seedlings; germination; mathematical models
Abstract:
... Several single-value germination indices, including Kotowski's coefficient of velocity, Maguire's speed of germination, Czabator's germination value, Diavanshir and Pourbiek's germination value, Timson's cumulative germination, Lehle and Putnam's Richards function index, Smith and Millett's sprouting index, and Tucker and Wright's regression index, were evaluated to test their ability to distingui ...
DOI:
10.1093/oxfordjournals.aob.a087534

16. Representing cumulative germination. 2. The use of the Weibull function and other empirically derived curves

Author:
Brown, R.F.; Mayer, D.G.
Source:
Annals of botany 1988 v.61 no.2 pp. 127-138
ISSN:
0305-7364
Subject:
Aristida; germination
Abstract:
... The Weibull, Morgan–Mercer–Flodin, Richards, Mitscherlich, Gompertz and logistic functions were each fitted to a wide range of cumulative germinations of non-dormant seed. The Weibull proved the most suitable for describing cumulative germination as it provided a consistently close fit to the data and was insensitive to choice of starting values, thus making it fairly easy to fit. The others provi ...
DOI:
10.1093/oxfordjournals.aob.a087535

17. Sporangial distribution patterns in the strobili of African and Madagascan Selaginella

Author:
Quansah, N.
Source:
Annals of botany 1988 v.61 no.2 pp. 243-247
ISSN:
0305-7364
Subject:
taxonomy; Polypodiopsida; ferns and fern allies; plant organs; Africa
Abstract:
... The sporangial distribution patterns occurring in the strobili of 30 species of Selaginella subgenus Stachygynandrum from Africa and Madagascar are described. The patterns of sporangial distribution can be put into eight major Types and five Variations of three Types. Even though some species exhibit more than one Type and/or Variation, the distribution pattern is consistent for each species and c ...
DOI:
10.1093/oxfordjournals.aob.a087550

18. Structural changes during the in vitro germination of Vanilla planifolia (Orchidaceae)

Author:
Philip, V.J.; Nainar, S.A.Z.
Source:
Annals of botany 1988 v.61 no.2 pp. 139-145
ISSN:
0305-7364
Subject:
organogenesis; Vanilla planifolia; germination
Abstract:
... A study is reported of histogenesis and organogenesis during the processes leading up to seedling formation in cultures of Vanilla planifolia. Prior to germination, all cells of the embryo increased in size rupturing the seed coat and initiating the protocorm stage. The cells of the protocorm were heavily laden with starch grains. Although all of the cells of the mature embryo were heavily laden w ...
DOI:
10.1093/oxfordjournals.aob.a087536

19. Tubulin and male-gamete interconnections in the pollen tubes of the grass Alopecurus pratensis

Author:
Heslop-Harrison, J.; Heslop-Harrison, Y.
Source:
Annals of botany 1988 v.61 no.2 pp. 249-254
ISSN:
0305-7364
Subject:
Alopecurus pratensis; pollen tubes; germ cells
Abstract:
... Tubulin was localized in pollen tubes of the grass Alopecurus pratensis by immunofluorescence using a rat monoclonal yeast antitubulin as a primary antibody. In tubes fixed in active growth with paraformaldehyde fixative and permeabilized with detergent, the two male gametes were found to be linked by tubulin-containing cytoplasmic bridges. The connections appeared to persist throughout the growth ...
DOI:
10.1093/oxfordjournals.aob.a087551

20. Ultrastructural modifications of plastids and starch metabolism during the microsporogenesis of Ophrys lutea (Orchidaceae)

Author:
Feijo, J.A.; Pais, M.S.S.
Source:
Annals of botany 1988 v.61 no.2 pp. 215-219
ISSN:
0305-7364
Subject:
Ophrys lutea; plastids; starch
Abstract:
... Ultrastructure of plastids has been studied throughout microsporogenesis of Ophrys lutea Cav. (Orchidaceae). A typical dedifferentiation/redifferentiation cycle of plastids was observed. At prophase I, plastids of pre-meiocytes gradually lost starch and separated the meiocytes through cytomictic channels. At meiosis, plastids dedifferentiated to protoplasts and redifferentiated in young microspore ...
DOI:
10.1093/oxfordjournals.aob.a087545