biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 49:459-462, 2005 | DOI: 10.1007/s10535-005-0029-2

Gas exchange characteristics and water relations in two cultivars of Hibiscus esculentus under waterlogging

M. Ashraf1,*, M. Arfan1
1 Department of Botany, University of Agriculture, Faisalabad, Pakistan

Thirty-day-old plants of two okra cultivars, Sabzpari and Chinese-red, were subjected for 30 d to normal watering or continuous flooding. Continuous flooding did not cause any adverse effect on shoot fresh and dry biomass. Leaf water potential and pressure potential of both cultivars increased significantly due to waterlogging, but there was a slight increase in leaf osmotic potential. Chlorophyll a and b contents decreased significantly and chlorophyll a/b ratio increased. Waterlogging caused a significant reduction in net photosynthetic rate, water use efficiency and intrinsic water use efficiency, but stomatal conductance and intercellular CO2/ambient CO2 ratio remained unchanged.

Keywords: anaerobiosis; chlorophyll; flooding; net photosynthetic rate; okra; stomatal conductance; transpiration rate
Subjects: chlorophylls, anaerobiosis, gas exchange; cultivar and genotype differences, gas exchange, water relations; flooding, anaerobiosis, gas exchange; gas exchange, water relations, chlorophyll; Hibiscus esculentus; okra, gas exchange, water relations; osmotic potential; stomatal conductance, net photosynthetic rate, chlorophyll; transpiration rate; water potential; water relations

Received: August 18, 2004; Accepted: January 11, 2005; Published: September 1, 2005  Show citation

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Ashraf, M., & Arfan, M. (2005). Gas exchange characteristics and water relations in two cultivars of Hibiscus esculentus under waterlogging. Biologia plantarum, 49(3), 459-462. doi: 10.1007/s10535-005-0029-2
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