Biologia Plantarum

, Volume 49, Issue 3, pp 459–462 | Cite as

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

Brief Communication


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.

Additional key words

anaerobiosis chlorophyll flooding net photosynthetic rate okra stomatal conductance transpiration rate 



ambient CO2 concentration


intercellular CO2 concentration




transpiration rate


stomatal conductance


net photosynthetic rate


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Copyright information

© Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Praha 2005

Authors and Affiliations

  1. 1.Department of BotanyUniversity of AgricultureFaisalabadPakistan

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