Evidence For Root Contraction In White Clover (Trifolium repens L.)
نویسندگان
چکیده
منابع مشابه
Molecular evolution of the Li/li chemical defence polymorphism in white clover (Trifolium repens L.).
White clover (Trifolium repens) is naturally polymorphic for cyanogenesis (hydrogen cyanide release following tissue damage). The ecological factors favouring cyanogenic and acyanogenic plants have been examined in numerous studies over the last half century, making this one of the best-documented examples of an adaptive polymorphism in plants. White clover cyanogenesis is controlled by two, in...
متن کاملRecurrent gene deletions and the evolution of adaptive cyanogenesis polymorphisms in white clover (Trifolium repens L.).
Understanding the molecular evolution of genes that underlie intraspecific polymorphisms can provide insights into the process of adaptive evolution. For adaptive polymorphisms characterized by gene presence/absence (P/A) variation, underlying loci commonly show signatures of long-term balancing selection, with gene-presence and gene-absence alleles maintained as two divergent lineages. We exam...
متن کاملRapid evolution of an adaptive cyanogenesis cline in introduced North American white clover (Trifolium repens L.).
White clover is polymorphic for cyanogenesis (HCN production after tissue damage), and this herbivore defence polymorphism has served as a classic model for studying adaptive variation. The cyanogenic phenotype requires two interacting biochemical components; the presence/absence of each component is controlled by a simple Mendelian gene (Ac/ac and Li/li). Climate-associated cyanogenesis clines...
متن کاملKunitz Proteinase Inhibitors Limit Water Stress Responses in White Clover (Trifolium repens L.) Plants
The response of plants to water deficiency or drought is a complex process, the perception of which is triggered at the molecular level before any visible morphological responses are detected. It was found that different groups of plant proteinase inhibitors (PIs) are induced and play an active role during abiotic stress conditions such as drought. Our previous work with the white clover (Trifo...
متن کاملAridity shapes cyanogenesis cline evolution in white clover (Trifolium repens L.).
Adaptive differentiation between populations is often proposed to be the product of multiple interacting selective pressures, although empirical support for this is scarce. In white clover, populations show adaptive differentiation in frequencies of cyanogenesis, the ability to produce hydrogen cyanide after tissue damage. This polymorphism arises through independently segregating polymorphisms...
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ژورنال
عنوان ژورنال: Annals of Botany
سال: 1999
ISSN: 0305-7364
DOI: 10.1006/anbo.1999.0928