Articles
CIRCUMVENTING THERMODORMANCY IN LETTUCE
Article number
504_16
Pages
147 – 152
Language
Abstract
High temperature during germination can lead to thermodormancy in lettuce.
Several methods to circumvent this dormancy have been proposed including resistant germplasm, adjusting the seed production environment, the use of growth hormones, and seed priming.
The mechanism of action for each of these methodologies appears to be related specifically to endosperm loosening which allows the embryo to grow under high temperature.
Endosperm loosening has been associated with the induction of endo-
-mannanase at the micropylar end.
Several methods to circumvent this dormancy have been proposed including resistant germplasm, adjusting the seed production environment, the use of growth hormones, and seed priming.
The mechanism of action for each of these methodologies appears to be related specifically to endosperm loosening which allows the embryo to grow under high temperature.
Endosperm loosening has been associated with the induction of endo-
-mannanase at the micropylar end.
Authors
W.M. Nascimento, D.J. Cantliffe
Keywords
Lactuca sativa, endosperm weakening, seed priming, stand establishment
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