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000052212 084__ $$2WoS$$aMultidisciplinary Sciences
000052212 1001_ $$0P:(DE-HGF)0$$aSchwachtje, J.$$b0
000052212 245__ $$aSNF1-related kinases allow plants to tolerate herbivory by allocating carbon to roots
000052212 260__ $$aWashington, DC$$bAcademy$$c2006
000052212 300__ $$a12935 - 12940
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000052212 520__ $$aHerbivore attack elicits costly defenses that are known to decrease plant fitness by using resources that are normally slated for growth and reproduction. Additionally, plants have evolved mechanisms for tolerating attack, which are not understood on a molecular level. Using 11C-photosynthate labeling as well as sugar and enzyme measurements, we found rapid changes in sink-source relations in the annual Nicotiana attenuata after simulated herbivore attacks, which increased the allocation of sugars to roots. This herbivore-induced response is regulated by the beta-subunit of an SnRK1 (SNF1-related kinase) protein kinase, GAL83, transcripts of which are rapidly down-regulated in source leaves after herbivore attack and, when silenced, increase assimilate transport to roots. This C diversion response is activated by herbivore-specific elicitors and is independent of jasmonate signaling, which regulates most of the plant's defense responses. Herbivore attack during early stages of development increases root reserves, which, in turn, delays senescence and prolongs flowering. That attacked GAL83-silenced plants use their enhanced root reserves to prolong reproduction demonstrates that SnRK1 alters resource allocation so that plants better tolerate herbivory. This tolerance mechanism complements the likely defensive value of diverting resources to a less vulnerable location within the plant.
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000052212 650_2 $$2MeSH$$aAnimals
000052212 650_2 $$2MeSH$$aCarbon: metabolism
000052212 650_2 $$2MeSH$$aFeeding Behavior
000052212 650_2 $$2MeSH$$aMolecular Sequence Data
000052212 650_2 $$2MeSH$$aPlant Roots: growth & development
000052212 650_2 $$2MeSH$$aPlant Roots: metabolism
000052212 650_2 $$2MeSH$$aPlants, Genetically Modified
000052212 650_2 $$2MeSH$$aProtein-Serine-Threonine Kinases: genetics
000052212 650_2 $$2MeSH$$aProtein-Serine-Threonine Kinases: metabolism
000052212 650_2 $$2MeSH$$aTobacco: enzymology
000052212 650_2 $$2MeSH$$aTobacco: genetics
000052212 650_2 $$2MeSH$$aTobacco: growth & development
000052212 650_2 $$2MeSH$$aTobacco: metabolism
000052212 650_7 $$07440-44-0$$2NLM Chemicals$$aCarbon
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000052212 65320 $$2Author$$acarbon-11
000052212 65320 $$2Author$$adefense
000052212 65320 $$2Author$$aplant-herbivore interactions
000052212 65320 $$2Author$$atolerance
000052212 7001_ $$0P:(DE-Juel1)VDB23736$$aMinchin, P. E. H.$$b1$$uFZJ
000052212 7001_ $$0P:(DE-Juel1)129336$$aJahnke, S.$$b2$$uFZJ
000052212 7001_ $$0P:(DE-HGF)0$$avan Dongen, J. T.$$b3
000052212 7001_ $$0P:(DE-HGF)0$$aSchittko, U.$$b4
000052212 7001_ $$0P:(DE-HGF)0$$aBaldwin, I. T.$$b5
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