Arabidopsis proline-rich extensin-like receptor kinase 4 modulates the early event toward abscisic acid response in root tip growth.
Exogenous application of plant hormone abscisic acid (ABA) can inhibit root growth. We recently reported that the proline-rich extensin-like receptor kinase 4 (PERK4) functions at an early stage of ABA signaling to inhibit primary root cell elongation by perturbing Ca2+ homeostasis.(1) Transcription analysis indicated that PERK4 modulates the expression of the genes related to cell elongation and ABA signaling in root growth, such as polygalacturonases, AtExt1, AtMYC2 and ABR1. Under ABA treatment, the transcript level of ZAT10, a Ca(2+)-responsive gene, increased in perk4 plants compared to that of wild-type. Based on both present data and the previous evidence, we propose a probable model for PERK4-mediated ABA-regulated primary root cell growth.
Bai
Ling
L
Henan Key Laboratory of Plant Stress Biology, Department of Biology, Henan University, Kaifeng, China.
Zhou
Yun
Y
Song
Chun-Peng
CP
D000040:Abscisic Acid / Q000235:genetics / Q000378:metabolism*; D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D002118:Calcium / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D006706:Homeostasis; D018519:Meristem / Q000254:growth & development / Q000378:metabolism*; D010937:Plant Growth Regulators / Q000235:genetics / Q000378:metabolism*; D011494:Protein Kinases / Q000378:metabolism*; D015398:Signal Transduction / Q000235:genetics
D000040:Abscisic Acid; D029681:Arabidopsis Proteins; D002118:Calcium; D010937:Plant Growth Regulators; D011494:Protein Kinases; C516241:STZ protein, Arabidopsis; C550344:proline-rich extensin-like receptor kinase 4, Arabidopsis