Evaluation of freezing tolerance inActinidiagermplasm based on relative electrolyte leakage

文献类型： 外文期刊

第一作者： Sun, Shihang

作者： Sun, Shihang;Qi, Xiujuan;Wang, Ran;Lin, Miaomiao;Fang, Jinbao

作者机构：

关键词： Cold stress; Freezing tolerance; Germplasm resource; Kiwifruit; Relative electrolyte leakage

期刊名称：HORTICULTURE ENVIRONMENT AND BIOTECHNOLOGY （ 影响因子：1.842； 五年影响因子：2.083 ）

ISSN： 2211-3452

年卷期： 2020 年 61 卷 4 期

页码：

收录情况： SCI

摘要： Cold stress in winter can have a disastrous effect on kiwifruit yield and affect geographical distribution. However, freezing tolerance inActinidiagenotypes remains largely unknown. Here, we report changes in metabolite content and enzyme activity in the shoots ofActinidiagenotypes exposed to low-temperature stress (- 5 degrees C, - 10 degrees C, - 15 degrees C, - 20 degrees C, - 25 degrees C and - 30 degrees C). Moreover, the relative electrolyte leakage method was used to evaluate the freezing tolerance of kiwifruit germplasm; 51 genotypes from 16 species ofActinidiawere evaluated in total. The data revealed that relative electrolyte leakage, proline (Pro), soluble protein, and catalase (CAT) activity changed with different low temperatures. Results showed that among 16 species,A. kolomikta,A. polygama, andA. argutahad lower LT50 than other species.A. arguta, originating from the northeast of China, exhibited stronger freezing resistance than the ones from other places. There was little difference in freezing tolerance betweenA. chinensisandA. deliciosa. These findings provide new insights into the freezing tolerance ability and mechanisms of kiwifruit and further contribute to our understanding of the relationship between freezing tolerance and geographic distribution.

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