Signal Transduction Pathways Activated by R Proteins

Coaker, Gitta; Baker, Daniel H.

doi:10.1002/9781118481431.ch3

Cited by 1 publication

(1 citation statement)

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“…Several up-regulated At MAPK orthologous transcripts are associated with both PTI- and ETI- defence responses. FG511331 is orthologous with AtMAPK4 , which is associated with PTI- and ETI-response signalling [ 70 , 71 , 74 , 75 ] and has been shown to be associated with long-lasting resistance to pathogen attack in A . thaliana plants [ 76 ].…”

Section: Discussionmentioning

confidence: 99%

Transcriptome Analysis of Kiwifruit (Actinidia chinensis) Bark in Response to Armoured Scale Insect (Hemiberlesia lataniae) Feeding

et al. 2015

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The kiwifruit cultivar Actinidia chinensis ‘Hort16A’ is resistant to the polyphagous armoured scale insect pest Hemiberlesia lataniae (Hemiptera: Diaspididae). A cDNA microarray consisting of 17,512 unigenes selected from over 132,000 expressed sequence tags (ESTs) was used to measure the transcriptomic profile of the A. chinensis ‘Hort16A’ canes in response to a controlled infestation of H. lataniae. After 2 days, 272 transcripts were differentially expressed. After 7 days, 5,284 (30%) transcripts were differentially expressed. The transcripts were grouped into 22 major functional categories using MapMan software. After 7 days, transcripts associated with photosynthesis (photosystem II) were significantly down-regulated, while those associated with secondary metabolism were significantly up-regulated. A total of 643 transcripts associated with response to stress were differentially expressed. This included biotic stress-related transcripts orthologous with pathogenesis related proteins, the phenylpropanoid pathway, NBS-LRR (R) genes, and receptor-like kinase–leucine rich repeat signalling proteins. While transcriptional studies are not conclusive in their own right, results were suggestive of a defence response involving both ETI and PTI, with predominance of the SA signalling pathway. Exogenous application of an SA-mimic decreased H. lataniae growth on A. chinensis ‘Hort16A’ plants in two laboratory experiments.

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