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The Presence of an Abscisic Acid like Factor in Nonviable Rice Seeds
Author(s) -
Dey Bharati,
Sircar S. M.
Publication year - 1968
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.1399-3054.1968.tb07333.x
Subject(s) - abscisic acid , endosperm , germination , biology , oryza sativa , embryo , botany , chemistry , biochemistry , microbiology and biotechnology , gene
Experiments were carried out with viable and nonviable rice seeds to detect the nature of germination inhibitors. An abscisic acid like factor is present in nonviable seeds but absent in viable ones. The main source of the factor is the embryo although measurable amounts are also obtained from the husk; it is not found in the endosperm however. Interaction with GA 3 and IAA suggests that both the rice seed inhibitor and abscisic acid are antagonistic to GA 3 and partially reversed the IAA induced growth. The similarity of the UV absorption spectra of the inhibitor and abscisic acid also proves its presence in nonviable seeds. The inhibitor suppresses the α‐anivlase activity both in intact and excised seeds in the same way as abscisic acid but the suppression is partially overcome with higher concentrations of GA 3 .