The Russian wheat aphid, Diuraphis noxia (Mordvilko) (Hemiptera: Aphididae), is a serious pest of cereal crops worldwide. D. noxia typically aggregates on the new growth of the host plant. The most obvious plant injury symptom is chlorosis. Research was conducted to understand the biochemical mechanisms of aphid-elicited chlorosis by using a set of aphid resistant wheat isolines (i.e., Tugela, Tugela-Dn1, Tugela-Dn2 and Tugela-Dn5) and three aphid infestation level (i.e., control, chlorosis-eliciting D. noxia and non-chlorosis-eliciting Rhopalosiphum padi). The objective was to determine temporal changes (3, 6, 9 and 12 days) of chlorophyll degradation enzyme (i.e., chlorophyllase, oxidative bleaching and Mg-dechelatase) activities and photosynthetic pigments among wheat isolines elicited by different aphid infestations.
Species 1: Homoptera Aphididae Diuraphis noxia (Russian Wheat Aphid)
Keywords: Chlorosis, Chlorophyll Degradation Enzyme
Back to Student Competition Ten-Minute Papers, Subsection Ea. Extension, Eb. Regulatory, F. Crop Protection Entomology, Fa. Host Plant Resistance
Back to Student Competition 10-minute Paper
Back to The 2002 ESA Annual Meeting and Exhibition