Effects of elevated atmospheric CO2 concentrations on phloem sap composition of spring crops and aphid performance

Publication Type
Journal contribution (peer reviewed)
Authors
Oehme, V., Högy, P., Zebitz, C.P.W., Fangmeier, A.
Year of publication
2013
Published in
Journal of Plant Interactions
Band/Volume
8/
DOI
10.1080/17429145.2012.736200
Page (from - to)
74-84
Abstract

The concentration and composition of free amino acids and carbohydrates in the phloem sap of wheat and oilseed rape (OSR) and the effects on the performance of aphids (Rhopalosiphum padi and Myzus persicae) were determined under atmospheric carbon dioxide (CO2) enrichment. The analysis of phloem sap showed that carbohydrates and amino acid levels of the host plants were significantly affected by elevated CO2. Among carbohydrate concentrations in the phloem sap, significant increases were observed in fructose and glucose in spring wheat under CO2 enrichment, whereas no changes were observed in OSR. These changes in plant chemistry affected the performance of herbivorous insects (i.e aphids) in varying ways, positively impacting the relative growth rate (RGR) of R. padi in spring wheat and negatively impacting the RGR of M. persicae on OSR.

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