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GrainGenes Reference Report: JEE-97-661

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Reference	JEE-97-661
Title	Enzymatic chlorophyll degradation in wheat near-isogenic lines elicited by cereal aphid (Homoptera : Aphididae) feeding
Journal	Journal of Economic Entomology
Year	2004
Volume	97
Pages	661-667
Author	Wang T Quisenberry SS Ni XZ Tolmay V
Abstract	Summary: Chlorophyll degradation enzyme (i.e., chlorophyllase, Mg-dechelatase, and chlorophyll oxidase) activities of aphid-infested and uninfested 'Tugela' and Tugela near-isogenic wheat lines (i.e., Tugela-Dn1, Tugela-Dn2, and Tugela-Dn5) were assayed. Chlorophyllase activity was higher in bird cherry-oat aphid, Rhopalosiphum padi (L.) (Homoptera: Aphididae),-infested wheat lines compared with Russian wheat aphid, Diuraphis noxia (Mordvilko) (Homoptera: Aphididae)]-infested and uninfested plants. Mg-dechelatase activity was higher in D. noxia-infested wheat lines than in R. padi-infested and uninfested plants. Also, Mg-dechelatase activity was lower in Tugela wheat infested with D. noxia than in Tugela near-isogenic lines with Dn genes. Based on the in vitro assays of chlorophyll degradation enzyme (i.e., chlorophyllase and Mg-dechelatase) activities, we proposed that the chlorotic symptoms observed on D. noxia-infested Tugela wheat were most likely to be elicited by unbalanced chlorophyll biosynthesis and degradation
External Databases	Pubmed: 15154496
Keyword	[ Hide all but 1 of 34 ] aphid apr assay assays biosynthesis breakdown catabolites chlorophyll chlorophyll biosynthesis chlorophyll degradation chlorophyll oxidase chlorophyllase cleavage control degradation diuraphis noxia diuraphis-noxia enzyme gene homoptera mg-dechelatase mordvilko near isogenic lines near-isogenic line near-isogenic wheat lines purification rape cotyledons resistance rhopalosiphum padi russian wheat russian wheat aphid senescent cotyledons symptoms triticum aestivum

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