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A growth analysis of waterlogging damage in mung bean (Phaseolus aureus)Mung beans (Phaseolus aureus Roxb.) were grown for 2 weeks in gravel-vermiculite soilless mix in a growth chamber and subjected to a 1-week waterlogging period followed by a 1-week recovery period. Sequential harvests were made to determine the time course of effects of waterlogging and subsequent recovery on growth parameters by techniques of growth analysis. Root dry matter was the first to be affected, along with an increase in leaf dry matter and specific leaf weight. After a 1-week waterlogging period, specific leaf weight had more than doubled in the stressed plants. Leaf area declined in relation to the control plants as did the ratio of root dry matter to shoot dry matter. During the recovery period there was an increase in the dry matter allocation to the roots relative to the shoot. Specific leaf weight fell to control levels although the rate of leaf area elaboration did not increase during this time, suggesting a redistribution of stored assimilates from the leaves. Net assimilation rate increased during the waterlogging period, probably due to a restriction in root metabolism and reduced translocation out of the leaf rather than to an increase in photosynthesis. Net assimilation rate of waterlogged plants was severely reduced compared with control plants during the recovery period. Both relative growth rate and leaf area duration declined during the waterlogging period and declined further subsequent to the waterlogging treatment. The results illustrate the interrelationships between root and shoot carbon budgets in mung bean during response to the stress of waterlogging.
Document ID
20040090365
Document Type
Reprint (Version printed in journal)
Authors
Musgrave, M. E.
(Louisiana State University Agricultural Center Baton Rouge 70803)
Vanhoy, M. A.
Date Acquired
August 21, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Canadian journal of botany
Volume: 67
ISSN: 0008-4026
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: BSR83-14925
CONTRACT_GRANT: DMB-87-06872
CONTRACT_GRANT: NAGW-70
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Number 40-99
NASA Discipline Plant Biology
NASA Program Space Biology Research Associates
Non-NASA Center
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