Drought stress in 'Shine Muscat' grapevine: Consequences and a novel mitigation strategy-5-aminolevulinic acid
文献类型: 外文期刊
作者: Yang, Yuxian 1 ; Xia, Jiaxin 1 ; Fang, Xiang 2 ; Jia, Haoran 1 ; Wang, Xicheng 4 ; Lin, Yiling 1 ; Liu, Siyu 1 ; Ge, Mengqing 1 ; Pu, Yunfeng 5 ; Fang, Jinggui 1 ; Shangguan, Lingfei 1 ;
作者机构: 1.Nanjing Agr Univ, Coll Hort, Nanjing, Jiangsu, Peoples R China
2.Fruit Crop Variety Improvement & Seedling Propagat, Nanjing, Jiangsu, Peoples R China
3.Jiangsu Vocat Coll Agr & Forestry, Sch Agron & Hort, Jurong, Jiangsu, Peoples R China
4.Jiangsu Acad Agr Sci, Inst Pomol, Nanjing, Jiangsu, Peoples R China
5.Tarim Univ, Coll Life Sci, Alar, Xinjiang, Peoples R China
关键词: grapevine; drought stress; ALA; transcriptome; metabolome; alleviation
期刊名称:FRONTIERS IN PLANT SCIENCE ( 影响因子:5.6; 五年影响因子:6.8 )
ISSN: 1664-462X
年卷期: 2023 年 14 卷
页码:
收录情况: SCI
摘要: Drought is a common and serious abiotic stress in viticulture, and it is urgent to select effective measures to alleviate it. The new plant growth regulator 5-aminolevulinic acid (ALA) has been utilized to alleviate abiotic stresses in agriculture in recent years, which provided a novel idea to mitigate drought stress in viticulture. The leaves of 'Shine Muscat' grapevine (Vitis vinifera L.) seedlings were treated with drought (Dro), drought plus 5-aminolevulinic acid (ALA, 50 mg/L) (Dro_ALA) and normal watering (Control) to clarify the regulatory network used by ALA to alleviate drought stress in grapevine. Physiological indicators showed that ALA could effectively reduce the accumulation of malondialdehyde (MDA) and increase the activities of peroxidase (POD) and superoxide dismutase (SOD) in grapevine leaves under drought stress. At the end of treatment (day 16), the MDA content in Dro_ALA was reduced by 27.63% compared with that in Dro, while the activities of POD and SOD reached 2.97- and 5.09-fold of those in Dro, respectively. Furthermore, ALA reduces abscisic acid by upregulating CYP707A1, thus, relieving the closure of stomata under drought. The chlorophyll metabolic pathway and photosynthetic system are the major pathways affected by ALA to alleviate drought. Changes in the genes of chlorophyll synthesis, including CHLH, CHLD, POR, and DVR; genes related to degradation, such as CLH, SGR, PPH and PAO; the RCA gene that is related to Rubisco; and the genes AGT1 and GDCSP related to photorespiration form the basis of these pathways. In addition, the antioxidant system and osmotic regulation play important roles that enable ALA to maintain cell homeostasis under drought. The reduction of glutathione, ascorbic acid and betaine after the application of ALA confirmed the alleviation of drought. In summary, this study revealed the mechanism of effects of drought stress on grapevine, and the alleviating effect of ALA, which provides a new concept to alleviate drought stress in grapevine and other plants.
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