U.S. flag

An official website of the United States government

PubAg

Main content area

You searched for: Publication Year 2004 Remove constraint Publication Year: 2004 Subject plant reproduction Remove constraint Subject: plant reproduction Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
Start Over

Search

36  Search Results

« Previous | 1 - 20 of 36 |
Number of results to display per page

Search Results

1. Developmental analyses reveal early arrests of the spore-bearing parts of reproductive organs in unisexual flowers of cucumber (Cucumis sativus L.)

Author:
Bai, S.L.; Peng, Y.B.; Cui, J.X.; Gu, H.T.; Xu, L.Y.; Li, Y.Q.; Xu, Z.H.; Bai, S.N.
Source:
Planta 2004 v.220 no.2 pp. 230-240
ISSN:
0032-0935
Subject:
flowering; Cucumis sativus; morphogenesis; cucumbers; vegetable crops; flowers; plant reproduction; ultrastructure; plant morphology
Abstract:
... To understand the regulatory mechanisms governing unisexual flower development in cucumber, we conducted a systematic morphogenetic analysis of male and female flower development, examined the dynamic changes in expression of the C-class floral organ identity gene CUM1, and assessed the extent of DNA damage in inappropriate carpels of male flowers. Accordingly, based on the occurrence of distinct ...
DOI:
10.1007/s00425-004-1342-2
PubMed:
15290297

2. Analysis of shade and temperature effects on assimilate partitioning in the everbearing strawberry 'Everest' as the basis for optimised long-season fruit production

Author:
Wagstaffe, A.; Battey, N.H.
Source:
Journal of horticultural science & biotechnology 2004 v.79 no.6 pp. 917-922
ISSN:
1462-0316
Subject:
nutrient transport; strawberries; Fragaria ananassa; photosynthates; net assimilation rate; light intensity; crop yield; shade; photosynthesis; plant reproduction; temperature; leaves; vegetative growth; United Kingdom

3. Breeding system of Macromeria viridiflora (Boraginaceae) and geographic variation in pollinator assemblages

Author:
Boyd, A.E.
Source:
American journal of botany 2004 v.91 no.11 pp. 1809-1813
ISSN:
0002-9122
Subject:
Boraginaceae; corolla; geographical variation; hummingbirds; plant breeding; plant reproduction; pollen; pollinators; seeds
Abstract:
... This study explores the association between variation in pollinator type and flower size in Macromeria viridiflora (Boraginaceae) by studying the breeding system of the plant and the pollinator effectiveness of floral visitors. Studies were conducted at two sites where plants differ in flower size and floral visitors. Breeding system studies showed that while plants are self-compatible and occasio ...
DOI:
10.3732/ajb.91.11.1809
PubMed:
21652328

4. Secondary dispersal, spatial dynamics and effects of herbicides on reproductive capacity of a recently introduced population of Bromus sterilis in an arable field

Author:
Steinmann, H.H.; Klingebiel, L.
Source:
Weed research 2004 v.44 no.5 pp. 388-396
ISSN:
0043-1737
Subject:
Bromus sterilis; introduced species; weed control; herbicides; application rate; weed biology; seed dispersal; spatial distribution; population dynamics; plant reproduction; arable soils; Germany
DOI:
10.1111/j.1365-3180.2004.00413.x

5. The biology of Canadian weeds. 130. Solidago nemoralis Ait

Author:
Chmielewski, J.G.; Semple, J.C.
Source:
Canadian journal of plant science 2004 v.84 no.4 pp. 1221-1233
ISSN:
0008-4220
Subject:
Solidago nemoralis; weeds; weed biology; geographical distribution; plant morphology; leaves; flowers; habitats; plant growth; plant development; plant reproduction; herbicide resistance; disease resistance; Canada
DOI:
10.4141/P03-200

6. Floral initiation and development of the sex-changing plant Arisaema sikokianum (Araceae)

Author:
Fukai, S.
Source:
International journal of plant sciences 2004 v.165 no.5 pp. 739-744
ISSN:
1058-5893
Subject:
inflorescences; flowering; Arisaema sikokianum; plant reproduction; ultrastructure; plant morphology
DOI:
10.1086/422051

7. Mating and pseudothecial development in Mycosphaerella citri, the cause of citrus greasy spot

Author:
Mondal, S.N.; Howd, D.S.; Brlansky, R.H.; Timmer, L.W.
Source:
Phytopathology 2004 v.94 no.9 pp. 978-982
ISSN:
0031-949X
Subject:
in vitro culture; heterothallism; developmental stages; ascospores; ontogeny; asci; plant pathogenic fungi; leaves; plant reproduction; fruiting bodies; Citrus; fruit trees; Mycosphaerella citri; Florida
Abstract:
... Greasy spot, caused by Mycosphaerella citri, is a serious disease of citrus in the Caribbean basin. M. citri is a loculoascomycete and produces pseudothecia in decomposing leaves after intermittent wetting and drying. A new in vitro mating technique was developed for production of pseudothecia on sterilized leaf disks in petri dishes. Of the single-ascospore cultures that were recovered from indiv ...
DOI:
10.1094/PHYTO.2004.94.9.978
PubMed:
18943074

8. Population differentiation and plastic responses to drought stress in the generalist annual Polygonum persicaria

Author:
Heschel, M.S.; Sultan, S.E.; Glover, S.; Sloan, D.
Source:
International journal of plant sciences 2004 v.165 no.5 pp. 817-824
ISSN:
1058-5893
Subject:
phenotypic plasticity; plant stress; water use efficiency; drought; water stress; plant adaptation; physiological response; Persicaria maculosa; plant response; plant reproduction; soil water; plant morphology
DOI:
10.1086/421477

9. Geranium purpureum Vill

Author:
Tofts, R.J.
Source:
Journal of ecology 2004 v.92 no.4 pp. 720-731
ISSN:
0022-0477
Subject:
geographical distribution; plant stress; taxonomy; seeds; plant communities; phenology; flowers; Geranium; plant reproduction; plant morphology; stress tolerance; British Isles
DOI:
10.1111/j.0022-0477.2004.00909.x

10. Tolerance as a mechanism of resistance to Thrips palmi in common beans

Author:
Frei, A.; Bueno, J.M.; Diaz-Montano, J.; Gu, H.; Cardona, C.; Dorn, S.
Source:
Entomologia experimentalis et applicata 2004 v.112 no.2 pp. 73-80
ISSN:
0013-8703
Subject:
plant growth; Thrips palmi; beans; crop damage; Phaseolus vulgaris; antixenosis; crop yield; genotype; population density; plant reproduction; pest resistance; Colombia
Abstract:
... Tolerance as a mechanism of resistance to the melon thrips, Thrips palmi Karny (Thysanoptera: Thripidae), in common beans, Phaseolus vulgaris L., was evaluated under field and greenhouse conditions. Seven resistant (Brunca, BH-5, BH-60, BH-130, BH-144, EMP 486, and FEB 115) and five susceptible (PVA 773, EMP 514, BAT 477, APN 18, and RAZ 136) bean genotypes were assessed according to adult and lar ...
DOI:
10.1111/j.0013-8703.2004.00178.x

11. Effects of enhanced UV-B radiation on the hormonal content of vegetative and reproductive tissues of two tomato cultivars and their relationships with reproductive characteristics

Author:
Yang, H.; Zhao, Z.; Qiang, W.; An, L.; Xu, S.; Wang, X.
Source:
Plant growth regulation 2004 v.43 no.3 pp. 251-258
ISSN:
0167-6903
Subject:
tomatoes; seed germination; Solanum lycopersicum var. lycopersicum; cultivars; flowering; dose response; quantitative analysis; gibberellic acid; zeatin; genetic variation; plant reproduction; pollen germination; chemical constituents of plants; ultraviolet radiation; abscisic acid; indole acetic acid; vegetative growth; China

12. Rapid change in relative growth rate between the vegetative and reproductive stage of the life cycle in Plantago coronopus

Author:
Koelewijn, H.P.
Source:
New phytologist 2004 v.163 no.1 pp. 67-76
ISSN:
0028-646X
Subject:
source-sink relationships; flowering; plant nutrition; herbaceous plants; Plantago coronopus; plant reproduction; life cycle (organisms); vegetative growth
DOI:
10.1111/j.1469-8137.2004.01078.x

13. Style persistence, pollen limitation, and seed set in the common prairie plant Echinacea angustifolia (Asteraceae)

Author:
Wagenius, S.
Source:
International journal of plant sciences 2004 v.165 no.4 pp. 595-603
ISSN:
1058-5893
Subject:
fecundity; Echinacea angustifolia; florets; plant reproduction; pollen; seed set
DOI:
10.1086/386376

14. The reproductive biology of Agalinis auriculata (Michx.) Raf. (Orobanchaceae), a threatened North American prairie inhabitant

Author:
Mulvaney, C.R.; Molano-Flores, B.; Whitman, D.W.
Source:
International journal of plant sciences 2004 v.165 no.4 pp. 605-614
ISSN:
1058-5893
Subject:
plant breeding; Agalinis; Bombus impatiens; phenology; plant-insect relations; fruit set; plant reproduction; Melissodes; pollinating insects
DOI:
10.1086/386564

15. Current status and environmental impact of transgenic forest trees

Author:
van Frankenhuyzen, K.; Beardmore, T.
Source:
Canadian journal of forest research = 2004 v.34 no.6 pp. 1163-1180
ISSN:
0045-5067
Subject:
forest trees; environmental impact; transgenic plants; artificial regeneration; herbicide resistance; pest resistance; abiotic stress; stress tolerance; wood quality; fiber content; tree growth; plant reproduction; lignin; introgression; forest genetics; nontarget organisms; adverse effects; genetic engineering; forest ecosystems; disease resistance; gene flow; gene expression
Abstract:
... Advances in technology for in vitro propagation and genetic transformation have accelerated the development of genetically engineered trees during the past 15 years. At least 33 species of transformed forest trees have been successfully regenerated to date. Targeted traits include herbicide tolerance, pest resistance, abiotic stress tolerance, modified fiber quality and quantity, and altered growt ...
DOI:
10.1139/x04-024

16. Heritability of nectar traits: why do we know so little?

Author:
Mitchell, Randall J.
Source:
Ecology 2004 v.85 no.6 pp. 1527-1533
ISSN:
0012-9658
Subject:
amino acid composition; environmental factors; experimental design; genetic variation; genotype-environment interaction; greenhouses; heritability; nectar; odors; plant reproduction; sugars; taste
Abstract:
... Although floral and extrafloral nectar traits are important for plant reproduction and defense, we know little about their genetic basis. Only a handful of studies have quantified heritable variation for nectar traits, primarily in controlled environments that minimize environmental variation. Most such studies have reported strong genetic influences, with heritabilities often >0.35. However, beca ...
DOI:
10.1890/03-0388

17. Seedling survival and seed size: a synthesis of the literature

Author:
MOLES, ANGELA T.; WESTOBY, MARK
Source:
The journal of ecology 2004 v.92 no.3 pp. 372-383
ISSN:
0022-0477
Subject:
seedlings; mass; mortality; plant reproduction; seed productivity; seedling emergence; seedling growth; life history
Abstract:
... 1 Large‐seeded species have long been known to have higher survivorship during establishment than small‐seeded species. Here, we assessed the size of this advantage by compiling published data on survival through seedling emergence, seedling establishment and sapling establishment. 2 We found no relationship between seed mass and survival through the transition from viable seed in or on the soil t ...
DOI:
10.1111/j.0022-0477.2004.00884.x

18. The effect of within‐genet and between‐genet competition on sexual reproduction and vegetative spread in Potentilla anserina ssp. egedii

Author:
RAUTIAINEN, PIRJO; KOIVULA, KARI; HYVÄRINEN, MARKO
Source:
The journal of ecology 2004 v.92 no.3 pp. 505-511
ISSN:
0022-0477
Subject:
Potentilla anserina; clones; dry matter partitioning; plant reproduction; sexual reproduction; vegetative propagation; vegetative growth; intraspecific competition; seed dispersal; Finland
Abstract:
... 1 Patterns of biomass allocation to sexual and vegetative reproduction were examined in a perennial stoloniferous clonal plant, Potentilla anserina (L.) Rydb. ssp. egedii (Wormsk.) Hiitonen, in relation to intraspecific competition between monoclonal and multiclonal ramets. 2 We predicted that a lack of competition would generate allocation to rapid, short‐distance spread (vegetative propagation), ...
DOI:
10.1111/j.0022-0477.2004.00878.x

19. Facilitative effects of top-canopy plants on four dwarf shrub species in habitats severely distributed by pollution

Author:
Zvereva, E.L.; Kozlov, M.V.
Source:
Journal of ecology 2004 v.92 no.2 pp. 288-296
ISSN:
0022-0477
Subject:
air pollution; boreal forests; forest trees; overstory; shrubs; interspecific competition; forest habitats; plant reproduction; Russia
Abstract:
... 1. We hypothesized that the role of positive plant-plant interactions will increase with the environmental stress imposed by long-term pollution. We studied the effects of top-canopy plants on two deciduous (Vaccinium myrtillus, V. uliginosum) and two evergreen (V. vitis-idaea, Empetrum nigrum ssp. hermaphroditum) dwarf shrubs by comparing their growth and reproduction under trees and in gaps in i ...
DOI:
10.1111/j.0022-0477.2004.00854.x

20. Efectos de la fragmentation sobre la aborcion y depredacion de semillas en el Chaco Serrano

Author:
Chacoff, N.P.; Morales, J.M.; Vaquera, M. del P.
Source:
Biotropica 2004 v.36 no.1 pp. 109-117
ISSN:
0006-3606
Subject:
habitat fragmentation; Acacia; Parkinsonia; seed abortion; seed predation; Bruchidae; seed dispersal; plant reproduction; Argentina
Abstract:
... Effects of habitat fragmentation on the seed abortion and predation in the Chaco Serrano. ...
DOI:
10.1111/j.1744-7429.2004.tb00301.x