24-Epibrassinoslide enhances plant tolerance to stress from low temperatures and poor light intensities in tomato (Lycopersicon esculentum Mill.)
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- 作者：Lirong Cui ; Zhirong Zou ; Jing Zhang ; Yanyan Zhao…
- 关键词：Antioxidant enzymes ; ATP synthase β subunit ; 24 ; Epibrassinolide ; Mass spectrometry ; Reactive oxygen species ; Tomato
- 刊名：Functional & Integrative Genomics
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：16
- 期：1
- 页码：29-35
- 全文大小：595 KB
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Zhirong Zou (1)
Jing Zhang (1)
Yanyan Zhao (1)
Fei Yan (1)
1. College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, People’s Republic of China - 刊物类别：Biomedical and Life Sciences
- 刊物主题：Life Sciences
Cell Biology
Plant Genetics and Genomics
Microbial Genetics and Genomics
Biochemistry
Bioinformatics
Animal Genetics and Genomics - 出版者：Springer Berlin / Heidelberg
- ISSN：1438-7948
文摘
Brassinosteroids (Brs) are a newly recognized group of active steroidal hormones that occur at low concentrations in all plant parts and one of the active and stable forms is 24-epibrassinolide (EBR). We investigated the effect of EBR on tomato (Lycopersicon esculentum Mill.) and its mechanism when seedlings were exposed to low temperature and poor light stress conditions. Leaves of stress-tolerant ‘Zhongza9’ and stress-sensitive ‘Zhongshu4’ cultivars were pre-treated with spray solutions containing either 0.1 μM EBR or no EBR (control). The plants were then transferred to chambers where they were exposed to low temperatures of 12 °C/6 °C (day/night) under a low light (LL) level of 80 μmol · m−2 · s−1. Exogenous application of EBR significantly increased the antioxidant activity of superoxide dismutase, catalase and peroxidase, and decreased the rate of O2 · − formation and H2O2 and malondialdehyde contents. Additionally, the ATP synthase β subunit content was increased by exogenous hormone application. Based on these results, we conclude that exogenous EBR can elicit synergism between the antioxidant enzyme systems and the ATP synthase β subunit so that scavenging of reactive oxygen species becomes more efficient. These activities enable plants to cope better under combined low temperature and poor light stresses. Keywords Antioxidant enzymes ATP synthase β subunit 24-Epibrassinolide Mass spectrometry Reactive oxygen species Tomato