Abstract
Excised tomato cotyledons subjected to mannitol induced water stress had more total sugars than normal cotyledons during injury but less total sugars than normal cotyledons in the adaptive phase. During water stress injury, protein and UNA synthesis were reduced, activities of beta-fructofuranosidase and phosphofructokinase were reduced but activities of proteases, ribonuclease, hexokinase and glucose-6-phosphate dehydrogenase were increased. Additions of kinetin reversed the water stress effects on enzyme activities. It is concluded that during water stress injury, there was a fundamental reduction in cytokinin activities leading to the selective shift in the enzyme populations.
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Tatt, O.H. Selective shift in the metabolic pathways of excised tomato cotyledons in response to mannitol induced water stress. Biol Plant 20, 324–329 (1978). https://doi.org/10.1007/BF02923322
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DOI: https://doi.org/10.1007/BF02923322