The sugar transporter ZmSWEET11 participates in plant autophagy to respond to salt stress
Zhiyang Xing, Zengyuan Tian, Tongxian Chen, Haoyu Zang, Jiaying Wang, Shuting Zheng, Yuqi Guo
TL;DR
The ZmSWEET11 protein helps plants tolerate salt stress by enhancing autophagy, a process that helps cells survive under stress.
Contribution
This study is the first to show a direct interaction between ZmSWEET11 and autophagy-related proteins in response to salt stress.
Findings
ZmSWEET11 is localized to the plasma membrane and is induced by salt stress in maize seedlings.
Overexpression of ZmSWEET11 in Arabidopsis increases salt tolerance and autophagosome abundance.
ZmSWEET11 interacts with autophagy-related proteins ZmATG2a, ZmATG2b, ZmATG8e, and ZmATG18f.
Abstract
The sugar will eventually be exported transporters (SWEET) proteins play an important role in plant growth, development and stress responses. However, current research on the function of SWEET proteins in maize in response to salt stress is limited. In this study, we characterized the function of ZmSWEET11, a gene involved in salt stress response and autophagy induced by salt stress in plants. ZmSWEET11 is primarily expressed in the stems and is significantly induced by salt stress at maize seedlings stage. Subcellular localization analysis showed that ZmSWEET11 is localized to the plasma membrane. Gene silencing of ZmSWEET11 via the technology of virus-induced gene silencing (VIGS) impaired maize salt tolerance and autophagic activity. Furthermore, we also determined that ZmSWEET11 interacts with autophagy-related (ATG) proteins (ZmATG2a, ZmATG2b, ZmATG8e and ZmATG18f). Overexpression…
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Taxonomy
TopicsPlant nutrient uptake and metabolism · Polysaccharides and Plant Cell Walls · Autophagy in Disease and Therapy