Conditioning of Fasciation by Gibberellin and Genotype in Cotton (Gossypium hirsutum L.).

The round-leafed mutant cotton line L-501 developed fasciation of the upper stem when field grown in Central Asia. Fasciation co-segregated with the mutant gene for round leaves In.(l) Fasciation developed at the flowering stage, but removal of floral buds did not prevent fasciation. Fasciation in L-501 could be inhibited by the gibberellin (GA) biosynthesis inhibitor chlorocholine chloride or by fusicoccin. GA(3) application in the field induced fasciation in the mutant's parental line L-463, which has five-lobed leaves and does not normally develop fasciation. Fasciation did not develop in either line, even after GA(3) treatment, in UK glasshouse conditions.Key Words. Fasciation-Gibberellin-Gossypium-Leaf-shape-Mutanthttp://link.springer-ny.com/link/service/journals/00344/bibs/18n1p45.html