Research Progress on Harmful Characteristics and Mechanism of Walnut Late Frost

doi:10.13304/j.nykjdb.2022.0952

Abstract

Abstract:

The occurrence of early spring and late frost damage brought severe challenges to the production of walnuts in China， seriously affecting their growth， development， yield and revenue. In order to clarify the harmful characteristics and influencing mechanisms of late frost on walnuts in China， the influencing factors of the degree of damage caused by late frost on walnuts， as well as the changes in physiological and biochemical indicators and molecular mechanisms in response to low temperature stress were reviewed. It was found that research on physiological changes focused on the three aspects including cell membrane system （relative conductivity）， antioxidant system （malondialdehyde， superoxide dismutase， peroxidase and catalase） and osmoregulation substances （soluble sugars， soluble protein and proline）， in addition， the expression levels of genes such as JrPAL， JrJAZ， JrGRAS， JrICE1， JrCBF/JrDREB1， JrCOR， JrWRKY， JrDHN， JrGST， and JrPUB were induced by low temperature stress. And prospects were put for future research directions， which provided scientific basis for further exploring the response mechanism of walnuts to late frost damage and adopting effective production measures.

Key words: walnut, late frost damage, low-temperature stress, influence factor, mechanism

摘要：

早春晚霜冻害的发生给我国核桃生产带来严峻的考验，严重影响核桃生长发育、产量及收益。为明确我国核桃晚霜危害特性及影响机制，综述了核桃受晚霜危害程度的影响因素及其在响应低温胁迫时生理生化指标变化和分子机制。分析发现，关于生理变化相关的研究集中在细胞膜系统（相对电导率）、抗氧化系统（丙二醛、超氧化物歧化酶、过氧化物酶及过氧化氢酶）和渗透调节物质（可溶性糖、可溶性蛋白质及脯氨酸）3个方面，JrPAL、JrJAZ、JrGRAS、JrICE1、JrCBF/JrDREB1、JrCOR、JrWRKY、JrDHN、JrGST和JrPUB等基因的表达量受到低温胁迫的诱导。对未来的研究方向进行了展望，为进一步挖掘核桃应对晚霜危害的响应机制及采取有效的生产措施提供了科学依据。

关键词: 核桃, 晚霜危害, 低温胁迫, 影响因素, 机理

CLC Number:

S664.1

Suilin ZHANG, Yang LI, Yan LI, Yunqi ZHANG, Jianxun QI, Zhixia HOU. Research Progress on Harmful Characteristics and Mechanism of Walnut Late Frost[J]. Journal of Agricultural Science and Technology, 2024, 26(4): 18-26.

张绥林, 李洋, 李琰, 张赟齐, 齐建勋, 侯智霞. 核桃晚霜危害特性及影响机制研究进展[J]. 中国农业科技导报, 2024, 26(4): 18-26.

Figures/Tables 2

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