نتایج جستجو برای: vegetative and generative traits
تعداد نتایج: 16840975 فیلتر نتایج به سال:
A polarized division occurs normally in the development of microspores in plants. The result is a presumptive vegetative cell and generative cell within the young pollen grain. The generative nucleus in Tradescantia synthesizes DNA and considerably later, in the pollen tube, it divides to form two sperm nuclei. The vegetative nucleus probably degenerates in the pollen tube. In Tradescantia, it ...
Salinity stress is one of the most important problems of arid and semi-arid regions in the world. Based on Food and Agriculture Organization report, more than 40% of Iran’s under Irrigation lands, are against secondary salinity. The effects of salinity stress on some of vegetative traits and water relations on two rangeland plants species of leguminosae family was the main objective of this exp...
Chrysanthemum is one of the most important ornamental and medicinal plants in the world. In this study, diversity among 50 genotypes of chrysanthemum morifolium was analyzed using phenologic and morphologic traits. The variation between studied genotypes showed a significant difference for all traits and coefficient of genetic variations for most traits was greater than 40%. The highest general...
Genetic based knowledge of different vegetative and yield traits play a major role in varietal improvement of rice. Genetic variation gives room for recombinants which are essential for the development of a new variety in any crop. Based on this background, this work was carried out to evaluate genetic diversity of derived mutant lines and establish relationships between their yield and yield c...
Plants can respond with sink stimulation of photosynthesis when colonized with fungal or bacterial root symbionts, compensating costs of carbohydrate allocation to the microbes. However, constraints may arise under light limitation when plants cannot extensively increase photosynthesis. We hypothesize that under such conditions the costs for maintaining the symbiosis outweigh the benefits, ulti...
Many things change during shoot development. Although the most obvious of these is the production of reproductive structures, the morphology and physiology of leaves and vegetative buds changes as well. Some traits change continuously (either increasing or decreasing), while others are expressed in bimodal (present or absent) or even more complex patterns. Some traits vary in the same way in ev...
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