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Effect of sucrose taken up by developing Avena fatua L. panicles on the dormancy and α‐amylase synthesis of the seeds produced
Author(s) -
CAIRNS A. L. P.,
VILLIERS O. T.
Publication year - 1989
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1989.tb00855.x
Subject(s) - avena fatua , dormancy , caryopsis , panicle , sucrose , seed dormancy , biology , germination , botany , chemistry , biochemistry
Summary Dormancy of seeds harvested from excised Avena fatua panicles grown in solutions containing sucrose increased with increasing concentrations of sucrose. Induction of this sucrose‐imposed dormancy could be partially inhibited by the inclusion of GA 4/7 in the growing medium. The sucrose‐grown seeds were fully viable and dormancy could be broken by methods commonly used to break dormancy, such as treatment with GA 3 or dehusking and pricking the caryopsis. Low concentrations of sucrose added to the incubation medium stimulated GA 3 ‐induced α‐amylase synthesis in mature de‐embryonated A. fatua caryopses but higher concentrations inhibited it. The relevance of these findings to the explanation of the environmental component of A. fatua seed dormancy is discussed.