TY  - JOUR
AU  - Schwachtje, J.
AU  - Minchin, P. E. H.
AU  - Jahnke, S.
AU  - van Dongen, J. T.
AU  - Schittko, U.
AU  - Baldwin, I. T.
TI  - SNF1-related kinases allow plants to tolerate herbivory by allocating carbon to roots
JO  - Proceedings of the National Academy of Sciences of the United States of America
VL  - 103
SN  - 0027-8424
CY  - Washington, DC
PB  - Academy
M1  - PreJuSER-52212
SP  - 12935 - 12940
PY  - 2006
N1  - Record converted from VDB: 12.11.2012
AB  - Herbivore 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.
KW  - Animals
KW  - Carbon: metabolism
KW  - Feeding Behavior
KW  - Molecular Sequence Data
KW  - Plant Roots: growth & development
KW  - Plant Roots: metabolism
KW  - Plants, Genetically Modified
KW  - Protein-Serine-Threonine Kinases: genetics
KW  - Protein-Serine-Threonine Kinases: metabolism
KW  - Tobacco: enzymology
KW  - Tobacco: genetics
KW  - Tobacco: growth & development
KW  - Tobacco: metabolism
KW  - Carbon (NLM Chemicals)
KW  - Protein-Serine-Threonine Kinases (NLM Chemicals)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:16912118
C2  - pmc:PMC1568949
UR  - <Go to ISI:>//WOS:000240035900052
DO  - DOI:10.1073/pnas.0602316103
UR  - https://juser.fz-juelich.de/record/52212
ER  -