University of Khartoum

Response of ethylene and chlorophyll in two eucalyptus clones during drought

Response of ethylene and chlorophyll in two eucalyptus clones during drought

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Title: Response of ethylene and chlorophyll in two eucalyptus clones during drought
Author: Michelozzii, M.; Johnson, J. D.; Warrag, Essam I.
Abstract: A study was conducted with seven-month-old plantlets, of the clone 2814 of Euca-lyptio grandis x E. camaiduknsis Dehnh. hybrid and of the clone 2798 of E. grandis x E. robusta Sm., subjected to sublethal water stress. During the imposed drought, leaf water potentials and transpiration rates decreased, while ethylene production and leaf chlorophyll concentration increased to a maximum during the onset of water stress, and then declined. Stomata' closure coincided with or preceded maximum ethylene production. A saturation type relationship between ethylene production and chlorophyll concentration was observed. Geno-typic differences in the response to water stress occurred between clones with clone 2814 appearing to be a drought avoider and clone 2798 a drought tolerator.
URI: http://khartoumspace.uofk.edu/handle/123456789/18556
Date: 2016-01-21


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