The Effect of Herbivory on Temporal and Spatial Dynamics of Foliar Nectar Production in Cotton and Castor |
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| Authors: | Wackers F L; Zuber D; Wunderlin R; Keller F |
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| Institution: | Institute for Plant Science, Applied Entomology, ETH-Zentrum/NW, Clausiusstrasse 25, 8092, Zürich, Switzerland University of Zürich, Institute of Plant Biology, Zollikerstr. 107, CH-8008, Zürich, Switzerland |
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| Abstract: | The effects of feeding Spodoptera littoralis(Boisd.) (Lepidoptera:Noctuidae) larvae on the quantity and distribution of extrafloralnectar production by leaves of castor (Ricinus communis) andcotton (Gossypium herbaceum) were investigated. Following larvalfeeding, the total volume of nectar secreted by foliar nectariesincreased 2.5- and 12-fold, respectively. As HPLC-analysis showedno difference in sugar composition between extrafloral nectarfrom insect-damaged and control plants, it can be concludedthat the plants increased the secretion of carbohydrates inresponse to herbivory. In damaged castor leaves, the amountof sugar excreted through extrafloral nectaries representedapprox. 1 |
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