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The effect of temperature on the germination‐promoting activities of cytokinin and gibberellin applied to celery seeds (Apium graveolens)
Author(s) -
BIDDINGTON NORMAN L.,
THOMAS TUDOR H.,
DEARMAN ANTHONY S.
Publication year - 1980
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.1399-3054.1980.tb08649.x
Subject(s) - apium graveolens , gibberellin , germination , imbibition , chemistry , phytochrome , cytokinin , horticulture , botany , biology , red light , auxin , biochemistry , gene
Celery seeds ( Apium graveolens L. cv. Lathom Blanching) made dormant by high temperature pretreatment (28–40°C) during imbibition in the dark, germinated at 22°C in the light after treatment with benzyladenine (BA). This BA‐induced promotion of germination increased with increasing pre‐treatment temperature from 32 to 38°C. whether BA was given before or after pretreatment. A mixture of gibberellins A 4 and A 7 (GA 4/7 ) given before a 4 day high temperature pretreatment at 32°C partially inhibited the germination‐promoting activity of GA 4/7 given after. It is suggested that gibberellin induces the formation of a thermola‐bile product which is necessary for germination, the precursor of which has a limited source.