WRKY6 restricts Piriformospora indica-stimulated and phosphate-induced root development in Arabidopsis

BMC Plant Biology

Research Article

Ajit Varma¹  Irena Sherameti²  Ralf Oelmüller²  Madhunita Bakshi²  Khabat Vahabi²  Kai-Wun Yeh³  Samik Bhattacharya⁴  Ian Baldwin⁴  Atul Kumar Johri⁵ 

[1] Amity Institute of Microbial Technology, AUUP, Noida, India;Institute of General Botany and Plant Physiology, Friedrich-Schiller-University Jena, Dornburgerstr. 159, D-07743, Jena, Germany;Institute of Plant Biology, Taiwan National University, Taipei, Taiwan;Max-Planck-Institute for Chemical Ecology, Beutenberg Campus, Hans-Knöll-Straße 8, D-07745, Jena, Germany;School of Life Sciences, Jawaharlal Nehru University, 110067, New Delhi, India;

关键词: WRKY6;    Piriformospora indica;    Phosphate;    Root development;    Expression profiles;   

DOI  :  10.1186/s12870-015-0673-4

 received in 2015-08-01, accepted in 2015-12-03,  发布年份 2015

来源: Springer

【 摘 要 】

BackgroundArabidopsis root growth is stimulated by Piriformospora indica, phosphate limitation and inactivation of the WRKY6 transcription factor. Combinations of these factors induce unexpected alterations in root and shoot growth, root architecture and root gene expression profiles.ResultsThe results demonstrate that P. indica promotes phosphate uptake and root development under Pi limitation in wrky6 mutant. This is associated with the stimulation of PHOSPHATE1 expression and ethylene production. Expression profiles from the roots of wrky6 seedlings identified genes involved in hormone metabolism, transport, meristem, cell and plastid proliferation, and growth regulation. 25 miRNAs were also up-regulated in these roots. We generated and discuss here a list of common genes which are regulated in growing roots and which are common to all three growth stimuli investigated in this study.ConclusionSince root development of wrky6 plants exposed to P. indica under phosphate limitation is strongly promoted, we propose that common genes which respond to all three growth stimuli are central for the control of root growth and architecture. They can be tested for optimizing root growth in model and agricultural plants.

【 授权许可】

CC BY   
© Bakshi et al. 2015