文献类型： 外文期刊

作者： WEN, J. I. N. F. E. N. ¹ ; ZHAO, K. A. I. ² ; L, J. U. N. H. E. N. G., V ² ; HUO, J. I. N. L. O. N. G. ² ; WAN, H. O. N. G. J. I. A. N. ³ ; ZHANG, S. H. U. I. ² ; ZHANG, X. I. A. N. G. ² ; XIE, Z. H. I. H. E. ² ; DENG, M. I. N. G. H. U. A. ² ;

作者机构： 1.Kunming Univ Sci & Technol, Kunming 650500, Yunnan, Peoples R China

2.Yunnan Agr Univ, Kunming 650201, Yunnan, Peoples R China

3.Zhejiang Acad Agr Sci, Hangzhou 310021, Peoples R China

关键词： Pepper (Capsicum annuum L.); Drought and re-watering stress; Antioxidant defense system; Stress memory

期刊名称：PAKISTAN JOURNAL OF BOTANY （ 影响因子：1.101； 五年影响因子：1.066 ）

ISSN： 0556-3321

年卷期： 2022 年 54 卷 5 期

页码：

收录情况： SCI

摘要： Stress causes a stress memory in some plants, which appears to play a vital role in responding to repeated stress conditions. However, it's uncertain whether pepper has drought stress memory and, if so, what the physiological process is. We investigated the creation of pepper drought memory following the half-wilting and re-watering treatment cycles and the induction of the reaction oxygen species (ROS) scavenging system by evaluating antioxidant content, activity, and gene expression of antioxidant enzymes. The results indicated this treatment can significantly increase the ASA and GSH content in pepper seedlings under 5 cycles of drought and re-watering stress, and significantly increase the POD, SOD, CAT, APX, GPX, and GR activities and gene expression; This physiological and biochemical change improves the ability of pepper seedlings to remove ROS, so its ROS content is lower than that of untreated pepper seedlings under drought stress. In the end, the MDA content was remarkably lower than the untreated, indicating that the damage to the plants was less than that of the untreated. These results indicate that the antioxidant defence system is associated with memory response to circular drought and re-watering stress in pepper.