Journal
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Volume 40, Issue 5, Pages 431-438Publisher
GAUTHIER-VILLARS/EDITIONS ELSEVIER
DOI: 10.1016/S0981-9428(02)01390-6
Keywords
Arabidopsis thaliana; development; oligogalacturonides; receptor-like kinase; senescence; stress-related process
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The lectin receptor protein kinases (lecRKs) belong to a large gene family in Arabidopsis thaliana. As for numerous receptor-like kinases (RLKs) of plants, no physiological role has been assigned to lecRKs. To try to elucidate the role of one of them, the expression of lecRK-al was studied during development and in response to abiotic stimuli. Histochemical analysis of transgenic plants containing the lecRK-al promoter fused to the GUS reporter gene revealed an increase of the expression level of lecRK-al in parallel with natural senescence processes. These results were confirmed by in situ hybridization and RT-PCR experiments and appeared to be specific to this member of the lecRK-a family. The expression of lecRK-al is locally activated in response to wounding and is also activated in response to oligogalacturonides. LecRK-al seems to play an important role in both the developmental program and adaptive processes in A. thaliana. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
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