Sensivity of different species of field crops to chilling temperature. Pt. 3. ATP content and electrolyte leakage from seedling leaves
1990
Markowski, A. | Augustyniak, G. | Jankowiak, S. (Agriculture University, Krakow (Poland). Dept. of Plant Physiology)
ATP content of leaves, electrolyte leakage and surface injuries to seedling leaves in bean, maize and soybean were determined after two, four and seven days of chilling at 6, 3 and 0 degrees C, and in pea, field bean, wheat and spring rape after seven days of chilling at 5 and 3 degrees C. When electrolyte leakage did not increase relatively to its initial value before chilling, then low temperature did cause by itself any decrease, but on the contrary an increase of ATP content of leaves in species with both low and high chilling tolerance. Similarly, no decrease and even some increase of ATP content was observed when electrolyte leakage increased after two days at 3 or 6 degrees C in bean and 6 degrees C in maize. In all other cases especially after prolonged chilling, higher rates of electrolyte leakage were accompanied by a significant decrease of ATP, which was symptom of partial or complete disintegration of cell membranes. Though ATP content is related to membrane permeability, a decrease of its content cannot be regarded as the primary reason for membrane leakiness at low temperatures
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