Strigolactone Alleviates NaCl Stress by Regulating Antioxidant Capacity and Hormone Levels in Rice ( Oryza sativa L.) Seedlings

Jianqin Zhang, Naijie Feng (), Dianfeng Zheng, Aaqil Khan, Youwei Du, Yaxing Wang, Rui Deng, Jiashuang Wu, Jian Xiong, Zhiyuan Sun, Qicheng Zhang and Mingxin Wang
Additional contact information
Jianqin Zhang: The Coastal Agricultural College, Guangdong Ocean University, Zhanjiang 524088, China
Naijie Feng: The Coastal Agricultural College, Guangdong Ocean University, Zhanjiang 524088, China
Dianfeng Zheng: The Coastal Agricultural College, Guangdong Ocean University, Zhanjiang 524088, China
Aaqil Khan: The Coastal Agricultural College, Guangdong Ocean University, Zhanjiang 524088, China
Youwei Du: The Coastal Agricultural College, Guangdong Ocean University, Zhanjiang 524088, China
Yaxing Wang: The Coastal Agricultural College, Guangdong Ocean University, Zhanjiang 524088, China
Rui Deng: The Coastal Agricultural College, Guangdong Ocean University, Zhanjiang 524088, China
Jiashuang Wu: The Coastal Agricultural College, Guangdong Ocean University, Zhanjiang 524088, China
Jian Xiong: The Coastal Agricultural College, Guangdong Ocean University, Zhanjiang 524088, China
Zhiyuan Sun: The Coastal Agricultural College, Guangdong Ocean University, Zhanjiang 524088, China
Qicheng Zhang: The Coastal Agricultural College, Guangdong Ocean University, Zhanjiang 524088, China
Mingxin Wang: The Coastal Agricultural College, Guangdong Ocean University, Zhanjiang 524088, China

Agriculture, 2024, vol. 14, issue 9, 1-19

Abstract: Salt stress is a key environmental factor altering rice plant growth. Strigolactones (GR24) play a vital role in responding to various abiotic stresses and regulating plant growth. However, the regulatory mechanisms of SLs on rice seedlings under salt stress have not yet been clarified. A pot experiment was undertaken to evaluate the effects of GR24 soaking on the rice variety ‘Huanghuazhan’ (salt-sensitive) seedling growth, antioxidant metabolism, and endogenous hormones under NaCl stress. Results showed that NaCl stress significantly inhibited rice growth; disrupted antioxidant enzymes activity; and increased the content of soluble proteins (SPs), proline (Pro), malondialdehyde (MDA) and hydrogen–peroxide (H 2 O 2 ). GR24 significantly improved photosynthetic pigments and antioxidant–enzyme activities, including superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and ascorbate–peroxidase (APX); increased SP, ascorbic acid (AsA); and reduced glutathione (GSH) content and MDA, H 2 O 2 , and Pro content, resulting in the mitigation of oxidative injury caused by NaCl stress. Moreover, GR24 significantly increased the content of strigolactones (SLs), cytokinin (CTK), auxin (IAA), Gibberellin A3 (GA3), and IAA/ABA and CTK/ABA ratios and decreased the abscisic acid (ABA). Findings indicated that GR24 alleviated oxidative damage caused by NaCl stress by increasing photosynthetic and antioxidant capacity and maintaining the balance of endogenous hormones, thus improving the salt tolerance of rice seedlings.

Keywords: rice seedlings; strigolactone; NaCl stress; morphogenesis; antioxidant metabolism; hormone level (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2077-0472/14/9/1662/pdf (application/pdf)
https://www.mdpi.com/2077-0472/14/9/1662/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jagris:v:14:y:2024:i:9:p:1662-:d:1483628

Access Statistics for this article

Agriculture is currently edited by Ms. Leda Xuan

More articles in Agriculture from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().