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Plant and Cell Physiology, 1978, Vol. 19, No. 3 453-459
© 1978

Article

Heat stress: Effects of abscisic acid and kinetin on response and recovery of tobacco leaves

Chanan Itai1, Aliza Benzioni2 and Shlomit Munz1

1 Department of Biology Beer Sheva, Israel
2 Research and Development Authority, Ben Gurion University of the Negev Beer Sheva, Israel

The effects of kinetin and ABA application before or after heat shock were studied by determining the following parameters: CO2, fixation, leucine incorporation into protein and leakage of 36Cl or 14C-labeled metabolites. Kinetin pretreatment increased the heat damage while post-treatment enhanced recovery. ABA pretreatment did not reduce heat damage while post-treatment enhanced recovery, but to a lesser extent than kinetin. These findings are not consistent with the assumption that ABA plays a role in increasing the resistance of plants to stresses.

(Received October 27, 1977; )
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