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Reversal of Low Temperature Effects on a Tropical Plant by Gibberellic Acid 1
Author(s) -
Karbassi P.,
Garrard L. A.,
West S. H.
Publication year - 1971
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1971.0011183x001100050046x
Subject(s) - gibberellic acid , biology , starch , shoot , digitaria , botany , incubation , horticulture , food science , biochemistry , germination
Summary Pangolagrass plants ( Digitaria decumbens Stent.) exposed to 10C night temperature had increased starch contents and decreased amylolytic activities, dry weights, leaf areas, and shoot lengths as compared with control plants exposed to 30C night temperatures. Application of 10 ‐5 M gibberellic acid (GA 3 ) reversed these effects of 10C night temperature. The direct addition of GA 3 to the reaction mixture did not alter the in vitro amylolytic activity of crude leaf extracts of pangolagrass during their incubation either at 10C or 30C, which indicates that perhaps the effect of low temperature was on synthesis of amylolytic enzymes.