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Effect of Insect Clip Cages on Photosynthesis of Cotton and Cantaloupes

S. J. Crafts-Brandner and C. C. Chu


 
ABSTRACT

In insect-plant interaction studies, small clip cages are frequently used to confine the target insects on attached leaves. Little information is available on the clip cage effects on the leaf physiology that may confound experimental results. Objective of the study was to quantify the clip cage effects on photosynthesis of cotton (Gossypium hirsutum L) and cantaloupes (Cucumis melo L). Results showed that 24 h after the enclosure of clip cages (11.3 cm2 area) leaf chlorophyll content of the sampled cotton leaves was significantly increased compared to the non-enclosed areas. Three days after attaching clip cages to cotton leaves, Rubisco activity and carbon dioxide exchange rate (CER) were significantly decreased. Effects of clip cages on cantaloupe photosynthesis were similar to that found for cotton leaves. We suggest that clip cage effects on leaf physiology and micro-environment should be considered when interpreting results for insect-plant interactions.



Reprinted from Proceedings of the 1999 Beltwide Cotton Conferences pp. 921 - 923
©National Cotton Council, Memphis TN

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Document last modified Monday, Jun 21 1999