Plant sciences: Molecular view of pollen rejection
نویسندگان
چکیده
منابع مشابه
A global view of funding for the plant sciences
Research in plant biology has contributed much to our understanding of fundamental biological processes and will factor importantly in our ability to feed a growing population. However, a global view of funding for the plant sciences suggests a mixed outlook, with some success stories at individual institutions, but a general neglect in terms of national funding priorities. Cyrus Martin reports...
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Although plants were the organisms of choice in several classical centromere studies, molecular and biochemical studies of plant centromeres have lagged behind those in model animal species. However, in the past several years, several centromeric repetitive DNA elements have been isolated in plant species and their roles in centromere function have been demonstrated. Most significantly, a Ty3/g...
متن کاملEssential for Rejection of Self-Pollen
S proteins, pistil-specific ribonucleases that cosegregate with S alleles, have previously been shown to control rejection of self-pollen in Pefunia inflafa and Nicofiana alafa, two solanaceous species that display gametophytic self-incompatibility. The ribonuclease activity of S proteins was thought to degrade RNA of self-pollen tubes, resulting in the arrest of their growth in the style. Howe...
متن کاملSelf Rejection during Pollen-pistil Interactions
Plants being sessile by nature have developed sophisticated mechanisms to assist in their selection of mating partners. During a compatible pollination event, pollen grains that have landed on the stigmatic surface at the top of the pistil will adhere to the stigmatic cells, hydrate, germinate and form pollen tubes. The actively growing pollen tubes are often capable of penetrating the stigmati...
متن کاملS-RNase complexes and pollen rejection.
Biochemical interactions between the pollen and the pistil allow plants fine control over fertilization. S-RNase-based pollen rejection is among the most widespread and best understood of these interactions. At least three plant families have S-RNase-based self-incompatibility (SI) systems, and S-RNases have also been implicated in interspecific pollen rejection. Although S-RNases determine the...
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ژورنال
عنوان ژورنال: Nature
سال: 1985
ISSN: 0028-0836,1476-4687
DOI: 10.1038/318231a0