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Short‐ and Long‐term Effects of High Temperatures (47–49°C) on Tobacco Leaves. II. O 2 Uptake and Amylolytic Activity
Author(s) -
ITAI C.,
BENZIONI ALIZA
Publication year - 1973
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.1399-3054.1973.tb08594.x
Subject(s) - kinetin , tobacco leaf , chemistry , solanaceae , chloroplast , botany , nicotiana tabacum , biology , horticulture , biochemistry , in vitro , agricultural engineering , engineering , gene , explant culture
Detached tobacco (Nicotiana rustiest L.) leaves were exposed for 2 min to a temperature range of 24° to 47.5°C. The heat treatment enbanced O 2 uptake by 30 Vs. Likewise, amylolytic activity in chloroplast extracts was intensified; this activity being observed also in situ . The enhancements can be reversed either by short‐term cold treatment (7°C for 10 min), or by application of kinetin.