Premium
Preconditioning of Tobacco and Bean Leaves to Heat Shock by High Temperature or NaCl
Author(s) -
BENZIONI ALIZA,
ITAI CHANNAN
Publication year - 1975
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.1399-3054.1975.tb03872.x
Subject(s) - chemistry , shock (circulatory) , efflux , sodium , biochemistry , horticulture , botany , biophysics , biology , medicine , organic chemistry
The present paper examines whether leaves subjected to heat or salt pretreatment are better adapted to heat shock than untreated leaves. Such adaptation could result from either acquired thermo‐stability and/or better recovery. The rates of metabolic processes such as 14 CO 2 fixation, 14 C‐leucine incorporation into the TCA insoluble fraction, 32 P incorporation into phospholipids and 36 Cl efflux were used as indicators of adaptability. It was found that pretreatments (heat or salt) protect leaves only slightly against the short‐term effects of a heat treatment, but have a pronounced effect on recovery. Cytokinin level was reduced by heat shock, and as in the case of metabolic response, pretreatment had no effect on this reduction.