Results 71 to 80 of about 108,494 (314)
A functional evolution of the Leucobryaceae [PDF]
, 1990 Recent conclusions on the limits of the Leucobryaceae and on the function of the Leucobryaceous leaf are used as basis for further observations on evolution of the group. Eight genera are recognized in the family; 1. Leucobryum, 2.
Robinson, Harold
core
Tissue culture of oil palm : finding the balance between mass propagation and somaclonal variation [PDF]
, 2019 The oil palm (Elaeis guineensis Jacq.) is typically propagated in vitro by indirect somatic embryogenesis, a process in which somatic cells of an explant of choice are, via an intermediate phase of callus growth, induced to differentiate into somatic ...
Inzé, Dirk, Maene, Ludo, Weckx, Sylvie
core +2 more sources
American 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
Combined genetic, genomic and physiological approaches to characterize flowering in Fragaria [W324] [PDF]
, 2015 Flowering is a key event for production of seeds or fruits. To date, studies of this process were mainly focused on the molecular mechanisms involved in the control of flowering until now.
Demene, M.N. +9 more
core
Sex allocation and reproductive success in the andromonoecious perennial, Solanum carolinense (Solanaceae). II. paternity and functional gender [PDF]
, 2017 The work was supported by a National Science Foundation Doctoral Dissertation Improvement grant (DEB‐9411513), by the Society for Sigma Xi, and by a Hutcheson Memorial Forest grant.According to Bateman's principle, male fitness in entomophilous plant ...
Elle, E, Meagher, Thomas Robert
core +1 more source
Climate change and perennial crop production: Evidence of yield impact and adaptation in California
American 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
Viewpoints on apornictic and sexual reproduction in angiosperms
Acta Societatis Botanicorum Poloniae, 2014 Gametophytic apomixis implies different changes of the reproductive cycle of sexual plants. Each of these "elements of apomixis" occurs in sexual plants, which may even display functional diploid parthenogenesis.
Sven Asker
doaj +1 more source
American Journal of Botany, EarlyView.Abstract Premise Insect herbivory is a major biotic factor shaping plant populations and driving the evolution of defensive traits. Polyploidy (whole‐genome duplication) often induces substantial phenotypic and genotypic changes that may affect species interactions, including herbivory.
Antonio J. Manzaneda +4 more
wiley +1 more source
Populus tremuloides seedling establishment: An underexplored vector for forest type conversion after multiple disturbances [PDF]
, 2017 Ecosystem resilience to climate change is contingent on post-disturbance plant regeneration. Sparse gymnosperm regeneration has been documented in subalpine forests following recent wildfires and compounded disturbances, both of which are increasing.
Buma, Brian +3 more
core +1 more source
Shaped by context: Evolutionary trajectories of desiccation tolerance in land plants
American Journal of Botany, EarlyView.Abstract Desiccation tolerance (DT), the ability to survive near‐complete cellular dehydration, is widespread in diaspores but rare in the vegetative tissues of land plants. The patchy and punctuated phylogenetic distribution of vegetative desiccation tolerance (VDT) suggests that the trait is both ancient and recurrent, yet the evolutionary ...
Rose A. Marks +2 more
wiley +1 more source