Leaf temperature of soybean grown under elevated CO 2 increases Aphis glycines [Hemiptera : Aphididae] population growth

Abstract Plants grown under elevated carbon dioxide [CO 2] experience physiological changes that influence their suitability as food for insects. To determine the effects of living on soybean [Glycine max Linnaeus] grown under elevated CO 2, population growth of the soybean aphid [Aphis glycines Matsumura] was determined at the SoyFACE research site at the University of Illinois, Urbana-Champaign, Illinois, USA, grown under elevated [550 uL/L] and ambient [370 uL/L] levels of CO 2. Growth of aphid populations under elevated CO 2 was significantly greater after 1 week, with populations attaining twice the size of those on plants grown under ambient levels of CO 2. Soybean leaves grown under elevated levels of CO 2 were previously demonstrated at SoyFACE to have increased leaf temperature caused by reduced stomatal conductance. To separate the increased leaf temperature from other effects of elevated CO 2, air temperature was lowered while the CO 2 level was increased, which lowered overall leaf temperatures to those measured for leaves grown under ambient levels of CO 2. Aphid population growth on plants grown under elevated CO 2 and reduced air temperature was not significantly greater than on plants grown under ambient levels of CO 2. By increasing Glycine max leaf temperature, elevated CO 2 may increase populations of Aphis glycines and their impact on crop productivity.

Bibliographic Details

Main Authors:	O’Neill, Bridget F., Zangerl, Arthur R., DeLucia, Evan H., Casteel, Clare L., Zavala, Jorge Alberto, Berenbaum, May R.
Format:	Texto biblioteca
Language:	eng
Subjects:	APHIS GLYCINES MATSUMURA, ELEVATED CO 2, GLYCINE MAX LINNAEUS, LEAF TEMPERATURE, APHIDIDAE, APHIS GLYCINES, GLYCINE MAX, HEMIPTERA, HEXAPODA,
Online Access:	http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46859
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