Embryogenesis generates the primary plant body of the seedling which is fairly uniform among flowering plants (Steeves and Sussex, 1989). How this body organisation is established in the plant embryo has become a focus of genetic analysis, using Arabidopsis as a model (Jürgens et al., 1991). A large-scale screen for mutations affecting the seedling body organisation identified genes that appear...

Drought significantly reduces yield of many crop plants including wheat in the world. Identification of wheat genotypes that can thrive on limited water is vital to boost the wheat production of rainfed areas. Forty wheat genotypes were screened for drought tolerance using 0, 7.5, 15 and 22.5% Polyethylene Ethylene Glycol 6000 solutions at PMAS Arid Agriculture University, Rawalpindi, Pakistan ...

Abscisic acid (ABA) plays regulatory roles in a host of physiological processes throughout plant growth and development. Seed germination, early seedling development, stomatal guard cell functions, and acclimation to adverse environmental conditions are key processes regulated by ABA. Recent evidence suggests that signaling processes in both seeds and guard cells involve heterotrimeric G protei...

The magnitude of inbreeding depression within populations is important for the evolution and maintenance of mixed mating systems. However, data are sparse on the magnitude of inbreeding depression in Robinia pseudoacacia. In this study, we compared differences in the mature seed set per fruit, seed mass, germination success, and seedling growth between self- and cross-pollination treatments and...

Measurements of methane (CH(4)) and nitrous oxide (N(2)O) fluxes have been extensively taken following rice seedlings transplanted into paddy fields, while little is known about CH(4) and N(2)O fluxes from rice seedling nurseries. Fluxes of CH(4) and N(2)O were simultaneously measured in rice seedling nurseries under the water regimes of continuous flooding and moist irrigation without waterlog...

10 Abstract. Research regarding seedling quality issues has been performed for decades and focused 11 primarily on conifer species, which comprise the greatest proportion of nursery production 12 worldwide. Demand for hardwood seedlings, particularly for conservation purposes, has increased 13 steadily in recent years, emphasizing the need for seedling quality assessment protocols specific to 1...

The landscape (matrix) surrounding habitat fragments critically aVects the biodiversity of those fragments due to biotic interchange and physical eVects. However, to date, there have been only a limited number of studies on plant– animal interactions in fragmented landscapes, particularly on how tree seedling herbivory is aVected by fragmentation. We have examined this question in a fog-depende...

Initial seedling recruitment is one of the most critical stages for plants in the Mediterranean basin. Moreover, wildfires and post-fire environmental conditions might deteriorate regeneration success, which can lead to problems for sustainable forest restoration and forest persistence. On this context, different seed origins and pine species may be better adapted to new environmental condition...

Seasonal drought is a common phenomenon in many forests predominated by monsoon climate. The impact of seasonal drought, however, may vary with elevations, and tree species of forests hence may differ in their response to elevations. In this study, we monitored the seasonal variation of seedling species composition, and their relative growth rate (RGR) along an elevational transect in tropical ...