Herbivory by sucking mirid bugs can reduce nectar production in Asphodelus aestivus Brot.Reportar como inadecuado




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Arthropod-Plant Interactions

, Volume 4, Issue 3, pp 153–158

First Online: 29 April 2010Received: 10 March 2009Accepted: 14 April 2010

Abstract

This experimental study focused on the effects of a mirid bug herbivore, Capsodes infuscatus on the flower nectar yield of a Mediterranean geophyte, Asphodelus aestivus. The effects of increasing densities of adult C. infuscatus bugs on A. aestivus, on the nectar volume and concentration were examined. Significant decreases were found in the number of flowers and nectar production as C. infuscatus densities increased. Analysis of covariance ANCOVA showed that nectar production was not affected by environmental variables air temperature, relative air humidity and day-time that were treated as covariates for the various bug herbivory intensities. Sugar concentration did not vary significantly among treatments, indicating that abiotic conditions were not responsible for differing nectar amounts. In light of A. aestivus’s dependence on pollinator visits to produce seeds, we conclude that C. infuscatus could impair pollination success by reducing the amount of nectar in flowers. To the best of our knowledge, the present study is the first to show that insect herbivores do not necessarily have to remove segments from the flower in order to decrease nectar secretion.

KeywordsCapsodes infuscatus Geophyte Leaf damage Plant-insect interaction Pollination success Seed production Handling Editor: Anna-Karin Borg-Karlson

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Autor: Yael Samocha - Marcelo Sternberg

Fuente: https://link.springer.com/







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