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Zhang R, Zheng D, Feng N, Qiu QS, Zhou H, Liu M, Li Y, Meng F, Huang X, Huang A, Li Y. Prohexadione calcium enhances rice growth and tillering under NaCl stress. PeerJ 2023; 11:e14804. [PMID: 36778152 PMCID: PMC9910188 DOI: 10.7717/peerj.14804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 01/05/2023] [Indexed: 02/09/2023] Open
Abstract
Salt stress affects crop quality and reduces crop yields, and growth regulators enhance salt tolerance of crop plants. In this report, we examined the effects of prohexadione-calcium (Pro-Ca) on improving rice (Oryza sativa L.) growth and tillering under salt stress. We found that NaCl stress inhibited the growth of two rice varieties and increased malondialdehyde (MDA) levels, electrolyte leakage, and the activities of the antioxidant enzymes. Foliar application of Pro-Ca reduced seedling height and increased stem base width and lodging resistance of rice. Further analyses showed that Pro-Ca application reduced MDA content, electrolyte leakage, and membrane damage in rice leaves under NaCl stress. Pro-Ca enhanced the net photosynthetic rate (Pn), stomatal conductance (Gs), and intercellular CO2 concentration (Ci) of rice seedlings, while increasing the activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and ascorbic acid peroxidase (APX) at the tillering stage under salt stress. Overall, Pro-Ca improves salt tolerance of rice seedlings at the tillering stage by enhancing lodging resistance, reducing membrane damages, and enhancing photosynthesis and antioxidant capacities of rice seedlings.
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Affiliation(s)
- Rongjun Zhang
- Guangdong Ocean University, College of Coastal Agricultural Sciences, Zhanjiang, China
| | - Dianfeng Zheng
- Guangdong Ocean University, College of Coastal Agricultural Sciences, Zhanjiang, China,South China, National Saline-tolerant Rice Technology Innovation Center, Zhanjiang, China,Shenzhen Institute of Guangdong Ocean University, Shenzhen, China
| | - Naijie Feng
- Guangdong Ocean University, College of Coastal Agricultural Sciences, Zhanjiang, China,South China, National Saline-tolerant Rice Technology Innovation Center, Zhanjiang, China,Shenzhen Institute of Guangdong Ocean University, Shenzhen, China
| | - Quan-Sheng Qiu
- Guangdong Ocean University, College of Coastal Agricultural Sciences, Zhanjiang, China,School of Life Sciences, Lanzhou University, MOE Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou, Gansu, China
| | - Hang Zhou
- Guangdong Ocean University, College of Coastal Agricultural Sciences, Zhanjiang, China,South China, National Saline-tolerant Rice Technology Innovation Center, Zhanjiang, China
| | - Meiling Liu
- Guangdong Ocean University, College of Coastal Agricultural Sciences, Zhanjiang, China
| | - Yao Li
- Guangdong Ocean University, College of Coastal Agricultural Sciences, Zhanjiang, China
| | - Fengyan Meng
- Guangdong Ocean University, College of Coastal Agricultural Sciences, Zhanjiang, China
| | - XiXin Huang
- Guangdong Ocean University, College of Coastal Agricultural Sciences, Zhanjiang, China
| | - Anqi Huang
- Guangdong Ocean University, College of Coastal Agricultural Sciences, Zhanjiang, China
| | - Yixiang Li
- Guangdong Ocean University, College of Coastal Agricultural Sciences, Zhanjiang, China
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