Results 71 to 80 of about 26,188 (307)

How do sink and source activities influence the reproduction and vegetative growth of spring ephemeral herbs under different light conditions? [PDF]

open access: yes, 2014
Spring ephemeral herbs inhabiting deciduous forests commonly complete reproduction and vegetative growth before canopy closure in early summer. Effects of shading by early canopy closure on reproductive output and vegetative growth, however, may vary ...
Kudo, Gaku, Sunmonu, Ninuola
core   +1 more source

Seeds of change: The impact of Ethiopia's direct seed marketing approach on smallholders' seed purchases and productivity

open access: yesAmerican Journal of Agricultural Economics, EarlyView.
Abstract While multiple factors explain low adoption rates of improved varieties by small‐scale farmers in sub‐Saharan Africa, a key supply‐side constraint is the limited availability of seed embodying new traits in the volume, quality, price, and timeliness required by farmers. This constraint is partly attributable to classical failures in the market
Dawit Mekonnen   +5 more
wiley   +1 more source

Estimation of the SNP Mutation Rate in Two Vegetatively Propagating Species of Duckweed

open access: yesG3: Genes, Genomes, Genetics, 2020
Mutation rate estimates for vegetatively reproducing organisms are rare, despite their frequent occurrence across the tree of life. Here we report mutation rate estimates in two vegetatively reproducing duckweed species, Lemna minor and Spirodela ...
George Sandler   +3 more
doaj   +1 more source

Vegetative Reproduction in Populations of Justicia Americana in Ohio and Alabama [PDF]

open access: yes, 1980
Author Institution: Department of Biology, University of Alabama in HuntsvilleCommunity structure and the role of vegetative reproduction were studied in the essentially monotypic stands of water willow within the Scioto and Hocking Rivers of Ohio and ...
Lewis, Kenneth P.
core  

Warm temperature conditions restrict the sexual reproduction and vegetative growth of the spring ephemeral Gagea lutea (Liliaceae) [PDF]

open access: yes, 2015
The responses of reproduction and growth to climate warming are important issues to predict the fate of plant populations at high latitudes. Spring ephemerals inhabiting cool-temperate forests grow better under cool conditions, but how reproductive ...
Kudo, Gaku, Sunmonu, Ninuola
core   +1 more source

Climate change and perennial crop production: Evidence of yield impact and adaptation in California

open access: yesAmerican Journal of Agricultural Economics, EarlyView.
Abstract Perennial crops are economically important. They contribute to food security, providing essential nutrients that are often lacking in annual crops, and provide additional environmental benefits compared with annual crops. Despite their importance, empirical research on the impacts of climate change and adaptation on perennial crops remains ...
Yuanyuan Wen   +2 more
wiley   +1 more source

Coordinated regulation of vegetative and reproductive branching in rice [PDF]

open access: yesProceedings of the National Academy of Sciences, 2015
Significance The patterns of lateral branching, including tillers and inflorescence branches, determine grain yields of many cereals. In this study, we characterized a regulatory network composed of microRNAs and transcription factor that coordinately regulate vegetative (tiller) and reproductive (panicle) branching in rice. The findings hold
Lei, Wang   +9 more
openaire   +2 more sources

High‐elevation endemic plants predicted to lose habitat from changing climate in Washington State

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise High‐elevation plants face unique challenges from potential climate change impacts that will likely require upslope migration into increasingly smaller suitable habitat. This situation is particularly acute for endemic species that by definition occupy small geographic ranges.
Nicholas L. Gjording   +4 more
wiley   +1 more source

Vegetative Powers: The Roots of Life in Ancient, Medieval, and Early Modern Natural Philosophy

open access: yes, 2021
The volume analyzes the natural philosophical accounts and debates concerning the vegetative powers, namely nutrition, growth, and reproduction. While principally focusing on the early modern approaches to the lower functions of the soul, readers will ...
Blank, Andreas   +3 more
core   +1 more source

Interactions between maternal provisioning and natural selection on seed mass fluctuate across heat waves

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Changing climates are leading to more frequent and severe heat waves, potentially threatening plant populations. Both acclimation to stress and selection for heat‐escape or heat‐resistance phenotypes occur during heat waves. However, plastic responses and selection do not necessarily interact cohesively—even producing trait responses ...
Lana F. Gaspard   +4 more
wiley   +1 more source

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