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The interaction between glucose and cytokinin signal transduction pathway in A rabidopsis thaliana
Author(s) -
KUSHWAH SUNITA,
LAXMI ASHVERYA
Publication year - 2014
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.12149
Subject(s) - auxin , arabidopsis , signal transduction , biology , hypocotyl , microbiology and biotechnology , arabidopsis thaliana , mutant , cytokinin , gene , gene expression , biochemistry , botany
Cytokinins ( CKs ) and glucose ( GLC ) control a number of common responses in plants. We hypothesize that there may be an extensive overlap between CK‐ and GLC ‐signalling pathways. Microarray along with physiological analysis has been performed to find out the interdependence/overlap between CK and GLC signal transduction pathways in Arabidopsis seedlings. GLC could transcriptionally affect 76% of CK ‐regulated genes at whole genome level, 89% of which are agonistically regulated. GLC may also affect CK ‐regulated gene expression via non‐transcriptional pathways. GLC can regulate several genes involved in CK metabolism and signalling. A number of gene families involved in development and stress are commonly regulated by CK and GLC . Physiologically, both GLC and CK could regulate hypocotyl length in dark. GLC and CK signalling may integrate at the level of type A A rabidopsis response regulators ( ARRs ) in controlling hypocotyl length. Both GLC and CK signalling cannot alter hypocotyl length in dark in auxin‐signalling mutants AUXIN RESPONSE2 / INDOLE ‐3‐ ACETIC ACID7 ( AXR2/IAA7 ) and AXR3/IAA17 suggesting that they may involve auxin‐signalling component as a nodal point. Here, we demonstrate that there is an extensive overlap between CK ‐ and GLC ‐regulated gene expression and physiological responses.