Applied Botany Section, Indian Institute of Technology, Kharagpur
Online published on 25 January, 2012.
Mutations affecting anthocyanin pigmentation in various plant parts have been recovered after different mutagenic treatments of dry seeds of black gram (Phaseolus mungo L.) variety T. 9. Of these, the anthocyanin negative I and anthocyanin negative II have no purple pigment in cotyledons, hypocotyl, epicotyl, stem, petiole and peduncle, unlike T. 9, which has anthocyanin pigmentation in all these parts except cotyledons which are green. Absence of pigmentation in these mutants is due to recessive genes at one of two loci which are complementary to each other. In the purple-cotyledon mutant, the cotyledon cocour changes to purple, a character that is controlled by an inhibitory gene.
