Premium
Characterisation of the High Temperature Inhibition of Germination of Lettuce ( Lactuca sativa )
Author(s) -
REYNOLDS T.,
THOMPSON P. A.
Publication year - 1971
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.1399-3054.1971.tb03532.x
Subject(s) - lactuca , germination , kinetin , abscisic acid , horticulture , botany , chemistry , biology , biochemistry , explant culture , gene , in vitro
Lactuca sativa L., lettuce (Arctic King) fruit germination is inhibited in the light at temperatures above 27 ° C(±1.5 ° ). This value, which is precise and repeatable is referred to as the upper temperature cut‐off point, and is characteristic for a particular species. It was found, that this cut‐off point is shifted upwards by applying kinetin solutions (0.1–1 mg/1) or downwards by applying (±)‐abscisic acid solutions (over 1 mg/1), the amount of shift being proportional to the level of active compound. In the presence of both compounds a balance was achieved. Effects of stimulators and inhibitors can most explicitly be described by reference to the direction and magnitude of the shift in the upper temperature cut‐off point, which results from their application.