Insights into physiological and molecular mechanisms underlying efficient utilization of boron in different boron efficient Beta vulgaris L. varieties

文献类型： 外文期刊

第一作者： Wang, Xiangling

作者： Wang, Xiangling;Song, Baiquan;Wu, Zhenzhen;Zhao, Xiaoyu;Song, Xin;Adil, Muhammad Faheem;Riaz, Muhammad;Lal, Milan Kumar;Huang, Wengong

作者机构：

关键词： Antioxidant enzyme; Boron deficiency; Lignin; Root morphology; Sugar beet

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 197 卷

页码：

收录情况： SCI

摘要： Boron (B) deficiency and consequent limitation of plant yield and quality, particularly of sugar beet (Beta vulgaris L.) has emerged as a maior problem,which is exacerbating due to cultivar dependent variability in B deficiency tolerance. Pertinently, the current study was designed to elucidate the physiological and molecular mechanisms of B deficiency tolerance of sugar beet varieties KWS1197 (B-efficient variety) and KWS0143 (B-inefficient va-riety). A hydroponic experiment was conducted employing two B levels B0.1 (0.1 mu M L-1 H3BO3, deficiency) and B50 (50 mu M L-1 H3BO3, adequacy). Boron deficiency greatly inhibited root elongation and dry matter accu-mulation; however, formation of lateral roots stimulated and average root diameter was increased. Results exhibited that by up-regulating the expression of NIP5-1, NIP6-1, and BOR2, and suppressing the expression of BOR4, cultivar KWS1197, in contrast to KWS0143, managed to transfer sufficient amount of B to the above-ground plant parts, facilitating its effective absorption and utilization. Accumulation of malondialdehyde (MDA) and reactive oxygen species (ROS) was also mellowed in KWS1197, as well as the oxidative damage to root cells via preservation of the antioxidant enzyme system. Additionally, the expression of essential enzymes for biosynthesis of phytohormone (PYR/PYL) and lignin (COMT, POX, and CCoAOMT) were found to be highly up-regulated in KWS1197. Deductively, through effective B absorption and transportation, balanced nutrient accumulation, and an activated antioxidant enzyme system, B-efficient cultivars may cope with B deficiency while retaining a superior cellular structure to enable root development.

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