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Internode length in Pisum. Two further gibberellin‐insensitivity genes, lka and lkb
Author(s) -
Reid James B.,
Ross John J.
Publication year - 1989
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1989.tb02067.x
Subject(s) - gibberellin , pisum , biology , mutant , gene , sativum , botany , genetics
Two further internode length genes are identified in Pisum sativum L. and named lka (identified from line NGB5865) and lkb (from NGB5862). These genes result in a similar phenotype, which includes reduced stem elongation, peduncle length and basal branching, and ‘banding’ of the stem. These effects are similar to, but less severe than, those of gene lk . Genes lka and lkb influence gibberellin (GA) sensitivity, since mutants NGB5865 and NGB5862 possess similar levels of endogenous GA‐like substances to the wild‐type parental cultivar Torsdag and respond less to applied GA 1 than do wild‐type plants or GA‐synthesis mutants of a similar stature. The action of genes lka and lkb is localised in the young apical tissue but is not thought to involve GA‐perception, since plants possessing genes lka and lkb are not true phenocopies of GA‐deficient plants. The genetic interaction of genes lka and lkb is examined and the action of gene lkb on a le gene background determined.