Auxin signaling is closely associated with Zn-efficiency in rice ( Oryza sativa L.)

Journal of plant interactions

article

Most Champa Begum¹  Monirul Islam¹  Mamunur Rashid Sarkar¹  Md Abu Sayem Azad²  A. K. M. Nazmul Huda³  Ahmad Humayan Kabir¹ 

[1] Department of Botany, University of Rajshahi;Department of Agronomy and Agricultural Extension, University of Rajshahi;Biotechnology and Genetic Engineering, Islamic University

关键词: Auxin signaling;    Znefficiency;    antioxidant defense;    Zn chelation;   

DOI  :  10.1080/17429145.2016.1220026

学科分类：纳米科学和纳米技术

来源: Taylor & Francis

【 摘 要 】

This study elucidates the involvement of auxin with Zn-efficiency (ZE) in Zn-efficient rice var. Pokkali. Pokkali showed no significant decrease in morpho-physiological features, electrolyte leakage and total soluble proteins due to Zn deficiency as compared with Zn-sufficient seedlings. However, auxin inhibitor under Zn deficiency severely affected these characteristics, suggesting that ZE is associated with auxin signaling in rice. Results further revealed significant decreases in the expression of Zn transporter genes (OsIRT1, OsZIP4 and OsZIP1), OsDMAS1 (deoxymugeneic acid synthase) and phytochelatin in roots due to auxin inhibitor. It implies that auxin signaling may trigger Zn uptake, transport and chelation in rice seedlings to withstand Zn-deficiency. Further, significant reduction of major S-metabolites (cysteine, methionine, glutathione) and antioxidant enzymes (superoxide dismutase and glutathione reductase) along with increased H2O2 content, due to auxin inhibitor under Zn deficiency compared with controls. Taken together, these findings reveal that mechanisms associated with ZE in Pokkali are dependent on auxin signaling.

【 授权许可】

CC BY|CC BY-NC