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STUDIES ON TUBERIZATION OF SOLANUM ANDIGENA
Author(s) -
KUMAR D.,
WAREING P. F.
Publication year - 1974
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1974.tb01311.x
Subject(s) - gibberellin , gibberellic acid , endogeny , kinetin , abscisic acid , chlormequat , hormone , ammonium chloride , biology , paclobutrazol , chemistry , biochemistry , botany , plant growth , germination , tissue culture , organic chemistry , gene , in vitro
S ummary The role of various growth‐regulating substances in tuberization in Solarium andigena was studied (1) by application of exogenous growth regulators, and (2) by studying variation in the levels of endogenous hormones under tuber‐inducing and non‐inducing conditions. In short‐day induced cuttings tuberization was inhibited by gibberellic acid; indole acetic acid and kinetin (6‐furfuryl amino purine) caused slight stimulation of tuber growth at low concentrations, but inhibited it at higher concentrations. Application of (2‐chloroethyl) trimethyl‐ammonium chloride (CCC) promoted tuberization in plants growing under non‐inducing long‐day conditions and in buds produced on isolated plugs of tuber tissue. The tuber‐inducing effects of CCC were not reversed by simultaneous application of GA 3 . Levels of endogenous gibberellins decreased markedly under short‐day conditions, but there was no difference in the levels of endogenous abscisic acid under long and short days. The reduced levels of gibberellins were maintained for at least 2 weeks when induced plants were transferred from short‐day to long‐day conditions. Application of CCC under conditions which promoted tuberization caused a reduction in gibberellin levels. The role of growth hormones in the regulation of tuberization is discussed.