Biologia plantarum 15:65-71, 1973 | DOI: 10.1007/BF02922343
High temperature - induced changes in germination, seedling vigour and the metabolic activities in rice seeds
- 1 Department of Botany, University of Calcutta, Calcutta-19, India
The effects of temperature treatments on rice seeds in the early imbibitional phase were studied with respect to changes in germination percentage, seedling growth in terms of root and shoot lengths, water uptake, respiration and hydrolytic enzymes,viz. α-amylase, adenosine triphosphatase (ATPase) and phytase. As compared with the control, the treatment for 30 min at 50 °C caused a variable degree of increase in all these characters and a positive correlation existed between seedling vigour and hydrolase activities. The treatment for 30 min at 60 °C, on the other hand, elicited a retarding influence on these characters. As regards the enzyme activities, the damaging effect of 60 °C could, however, be visualized only after 72 h of germination which was preceded by an enhancement during the early hours.
Received: November 17, 1971; Published: March 1, 1973 Show citation
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