文献类型： 外文期刊

作者： Liu, Lei ¹ ; Zhang, Pengfei ³ ; Feng, Guozhong ¹ ; Hou, Wenfeng ¹ ; Liu, Tianhao ² ; Gai, Zhijia ⁴ ; Shen, Yanhui ⁵ ; Qiu, Xin ⁶ ; Li, Xiangnan ² ;

作者机构： 1.Jilin Agr Univ, Coll Resources & Environm, Key Lab Straw Comprehens Utilizat & Black Soil Con, Changchun 130118, Peoples R China

2.Chinese Acad Sci, Northeast Inst Geog & Agroecol, State Key Lab Black Soils Conservat & Utilizat, Changchun 130102, Peoples R China

3.Northeast Agr Univ, Coll Agr, Harbin 150030, Peoples R China

4.Heilongjiang Acad Agr Sci, Jiamusi Branch, Jiamusi 154007, Peoples R China

5.Zhejiang Univ, Shandong Linyi Inst Modern Agr, Linyi 276000, Peoples R China

6.Jilin Agr Univ, Coll Econ & Management, Changchun 130118, Peoples R China

7.Univ Chinese Acad Sci, Coll Adv Agr Sci, Beijing 100049, Peoples R China

关键词： Cross-tolerance; Nitrogen recycling; Ion homeostasis; ABA; ROS; Carbohydrate metabolism

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：6.5； 五年影响因子：6.4 ）

ISSN： 0981-9428

年卷期： 2023 年 201 卷

页码：

收录情况： SCI

摘要： To understand the physiological mechanisms involved in xanthine metabolism during salt priming for improving low-temperature tolerance, salt priming (SP), xanthine dehydrogenase inhibitor (XOI), exogenous allantoin (EA), and back-supplemented EA (XOI + EA) treatments were given and the low-temperature tolerance of sugar beet was tested. Under low-temperature stress, salt priming promoted the growth of sugar beet leaves and increased the maximum quantum efficiency of PS II (Fv/Fm). However, during salt priming, either XOI or EA treatment alone increased the content of reactive oxygen species (ROS), such as superoxide anion and hydrogen peroxide, in the leaves under low-temperature stress. XOI treatment increased allantoinase activity with its gene (BvallB) expression under low-temperature stress. Compared to the XOI treatment, the EA treatment alone and the XOI + EA treatment increased the activities of antioxidant enzymes. At low temperatures, the sucrose content and the activity of key carbohydrate enzymes (AGPase, Cylnv, and FK) were significantly reduced by XOI compared to the changes under salt priming. XOI also stimulated the expression of protein phosphatase 2C and sucrose nonfermenting1-related protein kinase (BvSNRK2). The results of a correlation network analysis showed that BvallB was positively correlated with malondialdehyde, D-Fructose-6-phosphate, and D-Glucose-6-phosphate, and negatively correlated with BvPOX42, BvSNRK2, dehydroascorbate reductase, and catalase. These results suggested that salt-induced xanthine metabolism modulated ROS metabolism, photosynthetic carbon assimilation, and carbohydrate metabolism, thus enhancing low-temperature tolerance in sugar beet. Additionally, xanthine and allantoin were found to play key roles in plant stress resistance.