Uni-2—A Dominant Mutation Affecting Leaf Development in Phaseolus vulgaris
نویسندگان
چکیده
Uni-2, a dominant mutation that affects leaf development in Phaseolus vulgaris, is described. The mutant type is characterized by the production of unifoliolate true leaves as opposed to the trifoliolate true leaves that characterize the wild-type phenotype of this species. Segregation data from the F2, F3, and F4 generations of crosses between the unifoliolate mutant and trifoliolate genotypes suggest that the trait is coded by a single dominant gene with some deleteriousness in unifoliolate homozygotes. A new polymorphism for the enzyme methylumbelliferyl esterase was controlled by a single locus (Mue). No linkages were found between the unifoliolate trait and other molecular and morphological markers.
منابع مشابه
Seasonal Patterns of Nitrate Reductase and Nitrogenase Activities in Phaseolus vulgaris L.
The patterns of nitrate reductase activity (NRA) in the leaves (in vivo assay) and root nodule nitrogenase activity (C(2)H(2) reduction) were investigated throughout the season in field-grown Phaseolus vulgaris plants.Maximal NRA (per g fresh weight) occurred at early stages of leaf development but total activity (per leaf) was maximal when the leaf reached full size. In mature plants, most NRA...
متن کاملMechanism of cyanide inhibition of Phloem translocation.
Petiolar application of potassium cyanide inhibited (14)C-assimilate translocation without affecting source leaf photosynthesis or phloem loading of sucrose in Phaseolus vulgaris. The inhibition of transport was correlated with disruption of the structural integrity of the sieve tubes (sieve pore blockage) rather than impairment of a metabolic process in the translocation path driving transloca...
متن کاملIdentification of the protein storage vacuole and protein targeting to the vacuole in leaf cells of three plant species.
Protein storage vacuoles (PSVs) are specialized vacuoles devoted to the accumulation of large amounts of protein in the storage tissues of plants. In this study, we investigated the presence of the storage vacuole and protein trafficking to the compartment in cells of tobacco (Nicotiana tabacum), common bean (Phaseolus vulgaris), and Arabidopsis leaf tissue. When we expressed phaseolin, the maj...
متن کاملHeterogeneity of Glutamine Synthetase Polypeptides in Phaseolus vulgaris L.
Glutamine synthetases from roots, nodules, and leaves of Phaseolus vulgaris L. have been purified to homogeneity and their polypeptide composition determined.The leaf enzyme is composed of six polypeptides. The cytosolic fraction contains two 43,000 dalton polypeptides and the chloroplastic enzyme is formed by four 45,000 dalton polypeptides. Root glutamine synthetase consists only of the same ...
متن کاملSynthesis of Cellulase during Abscission of Phaseolus vulgaris Leaf Explants.
When abscission in leaf explants from Phaseolus vulgaris, cultivar Red Kidney, was allowed to proceed while the explants were in (2)H(2)O, a 1.25% increase in the buoyant density of cellulase in a cesium chloride gradient was observed. These data indicate that the increase in cellulase activity during abscission is a result of the synthesis of new protein. Two differentially soluble forms of ce...
متن کامل