Exogenous application of ABA mimic 1 (AM1) improves cold stress tolerance in bermudagrass (Cynodon dactylon)
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- 作者：Zhangmin Cheng ; Rui Jin ; Minjie Cao…
- 关键词：ABA ; Abiotic stress ; Bermudagrass ; Cold tolerance ; Reactive oxygen species
- 刊名：Plant Cell, Tissue and Organ Culture
- 出版年：2016
- 出版时间：May 2016
- 年：2016
- 卷：125
- 期：2
- 页码：231-240
- 全文大小：751 KB
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Rui Jin (1) (2) (3)
Minjie Cao (4)
Xiaodong Liu (5)
Zhulong Chan (1) (2)
1. Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China
2. Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan, 430074, China
3. University of Chinese Academy of Sciences, Beijing, 100039, China
4. Shanghai Center for Plant Stress Biology and Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes of Biological Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
5. College of Agronomy, Xinjiang Agricultural University, Ürümqi, 830052, Xinjiang, China - 刊物类别：Biomedical and Life Sciences
- 刊物主题：Life Sciences
Plant Sciences
Plant Physiology - 出版者：Springer Netherlands
- ISSN：1573-5044
文摘
In this study, small molecules AM1, which is an ABA-mimicking ligand, was used to investigate protective effect on cold tolerance of bermudagrass. Results of phenotypic and physiological changes showed that AM1 was an effective compound to increase bermudagrass cold resistance. In contrast to the control, exogenous AM1 pretreatment significantly improved the cold tolerance of bermudagrass seedlings, including promoted growth, decreased membrane conductivity, and increased survival rate in bermudagrass seedlings under cold condition. Moreover, AM1 pretreatment reduced contents of H2O2, O 2 ·− , ·OH and malondialdehyde, and increased activities of antioxidant enzymes including glutathione peroxidase, glutathione reductase, and superoxide dismutase. Osmolyte like proline accumulated in bermudagrass after AM1 pretreatment, indicating that these substances were also involved in osmotic adjustment in bermudagrass after AM1 treatment. Gene expression analysis indicated that genes encoding antioxidant enzymes and stress inducible proteins were modulated after AM1 pre-treatment. These results showed that exogenous AM1 pretreatment significantly reduced reactive oxygen species level and increased antioxidant enzyme activity to keep the homeostasis of reactive oxygen metabolism, as well as accumulation of proline and modulation of stress inducible genes, resulting in increased cold tolerance on bermudagrass .