Application of Xerophytophysiology and Signal Transduction in Plant Production: Partial Root-Zone Drying in Potato Crops
文献类型： 外文期刊
作者： Su, Feifei 1 ; Li, Yong 1 ; Liu, Shangwu 1 ; Liu, Zhenyu 1 ; Nie, Shengjun 3 ; Xu, Qicong 3 ; Qin, Feifei 4 ; Li, Fenglan 5 ;
作者机构： 1.Heilongjiang Acad Agr Sci, Virus Free Seedling Res Inst, Harbin 150086, Peoples R China
2.Heilongjiang Acad Agr Sci, Postdoctoral Programme, Harbin 150086, Peoples R China
3.Int Nat Farming Res Ctr, Hata 5632, Matsumoto, Nagano 3901401, Japan
4.Shandong Acad Agr Sci, Peanut Inst, Qingdao 266100, Peoples R China
5.Northeast Agr Univ, Coll Life Sci, Harbin 150030, Heilongjiang, Peoples R China
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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