Abstract
The effect of water stress (5 days of no watering) on leaf growth and its subsequent recovery after 5 days of watering was investigated in potted plants of eight potato (Solanum tuberosum L.) genotypes. The genotypes fell into three groups. Group A was characterized by minimum growth reduction under stress and rapid recovery on rewatering with final increase in leaf length exceeding that of the unstressed controls. In Group B, stress created moderate reduction in growth and on recovery the increase in leaf length became comparable to that of controls. Group C was characterized by large growth reduction and rewatering did not result in final leaf length increases comparable to that of controls. Statistical analysis showed a negative correlation between reduction in growth and stomatal conductance (r=−0.917;P<0.01) and between reduction in growth and transpiration (r=−0.912;P<0.01).
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