文献类型： 外文期刊

作者： Zhou, Xinpeng ¹ ; Tan, Zhanming ² ; Zhou, Yaguang ¹ ; Guo, Shirong ¹ ; Sang, Ting ³ ; Wang, Yu ¹ ; Shu, Sheng ¹ ;

作者机构： 1.Nanjing Agr Univ, Coll Hort, Key Lab Southern Vegetable Crop Genet Improvement, Minist Agr, Nanjing 210095, Peoples R China

2.Tarim Univ, Coll Hort & Forestry Sci, Alar 843300, Xinjiang, Peoples R China

3.NingXia Acad Agr & Forestry Sci, Inst Hort Res, Yinchuan 750002, Ningxia, Peoples R China

关键词： Antioxidant metabolism; Cucumber; Low light stress; Photosynthesis; Strigolactone; Sucrose metabolism

期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.26； 五年影响因子：5.761 ）

ISSN： 1471-2229

年卷期： 2022 年 22 卷 1 期

页码：

收录情况： SCI

摘要： Strigolactone is a newly discovered type of plant hormone that has multiple roles in modulating plant responses to abiotic stress. Herein, we aimed to investigate the effects of exogenous GR24 (a synthetic analogue of strigolactone) on plant growth, photosynthetic characteristics, carbohydrate levels, endogenous strigolactone content and antioxidant metabolism in cucumber seedlings under low light stress. The results showed that the application of 10 mu M GR24 can increase the photosynthetic efficiency and plant biomass of low light-stressed cucumber seedlings. GR24 increased the accumulation of carbohydrates and the synthesis of sucrose-related enzyme activities, enhanced antioxidant enzyme activities and antioxidant substance contents, and reduced the levels of H2O2 and MDA in cucumber seedlings under low light stress. These results indicate that exogenous GR24 might alleviate low light stress-induced growth inhibition by regulating the assimilation of carbon and antioxidants and endogenous strigolactone contents, thereby enhancing the tolerance of cucumber seedlings to low light stress.