Application of Xerophytophysiology and Signal Transduction in Plant Production: Partial Root-Zone Drying in Potato Crops

文献类型： 外文期刊

第一作者： Su, Feifei

作者： Su, Feifei;Li, Yong;Liu, Shangwu;Liu, Zhenyu;Lyu, Dianqiu;Su, Feifei;Nie, Shengjun;Xu, Qicong;Xu, Hui-lian;Qin, Feifei;Li, Fenglan

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关键词： Antioxidants; Aquaporin; Partial root-zone drying; Potato; RD28 gene; Xerophytophysiology

期刊名称：POTATO RESEARCH （ 影响因子：2.07； 五年影响因子：1.848 ）

ISSN： 0014-3065

年卷期： 2020 年 63 卷 1 期

页码：

收录情况： SCI

摘要： The irrigation method of partial root-zone drying (PRD) is based on drought stimulation without real water stress in order to induce xerophytophysiological signalling and regulations. In the present study, a series of measurements with potato (Solanum tuberosum L.) crops were conducted to understand the mechanisms underlying PRD. The results showed that PRD-induced osmotic adjustment shown by lower osmotic potential and higher turgor potential in fully turgid leaves and higher symplastic water fraction in cells. The PRD-induced osmotic adjustment was also confirmed by the active accumulation of osmolytes such as free proline, soluble sugars and soluble proteins. In PRD-treated potato plants, turgor maintenance by osmotic adjustment ensured improvements in photosynthetic activities, plant growth and final tuber yield. One of the signal substances, superoxide (O-2(-)), was increased by PRD but soon eliminated by superoxide dismutase (SOD), which was activated by PRD along with catalase (CAT) and peroxidase (POD). As one of the stress-responsive genes, the aquaporin gene RD28 was upregulated by PRD and might explain the improved physiological activities associated with the abovementioned xerophytophysiological regulations.

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