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The Dual Effect of Selenium Application in Reducing Fusarium Wilt Disease Incidence in Banana and Producing Se-Enriched Fruits

文献类型： 外文期刊

作者： Liu, Lina 1 ; Wang, Chengye 3 ; Yin, Kesuo 1 ; Ni, Ming 1 ; Ding, Yue 1 ; Li, Chengyun 2 ; Zheng, Si-Jun 1 ;

作者机构： 1.Yunnan Acad Agr Sci, Agr Environm & Resource Res Inst, Minist Agr & Rural Affairs Int Joint Res Ctr Agr, Yunnan Key Lab Green Prevent & Control Agr Transbo, Kunming 650205, Peoples R China

2.Yunnan Agr Univ, State Key Lab Conservat & Utilizat Bioresources Yu, Kunming 650500, Peoples R China

3.Chinese Acad Forestry, Inst Highland Forest Sci, Kunming 650224, Peoples R China

4.Biovers Int, Kunming 650205, Peoples R China

关键词： banana; Fusarium oxysporum f. sp. cubense tropical race 4; Se-enriched fruits; selenium; antioxidant enzymes

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2024 年 13 卷 23 期

页码：

收录情况： SCI

摘要： Fusarium wilt disease severely constrains the global banana industry. The highly destructive disease is caused by Fusarium oxysporum f. sp. cubense, especially its virulent tropical race 4 (Foc TR4). Selenium (Se), a non-essential mineral nutrient in higher plants, is known to enhance plant resistance against several fungal pathogens. The experiments we conducted showed that selenium (>= 10 mg/L) dramatically inhibited the growth of Foc TR4 mycelia and promoted plant growth. The further study we performed recorded a substantial reduction in the disease index (DI) of banana plants suffering from Foc TR4 when treated with selenium. The selenium treatments (20 similar to 160 mg/L) demonstrated significant control levels, with recorded symptom reductions ranging from 42.4% to 65.7% in both greenhouse and field trials. The DI was significantly negatively correlated with the total selenium content (TSe) in roots. Furthermore, selenium treatments enhanced the antioxidant enzyme activities of peroxidase (POD), polyphenol oxidase (PPO), and glutathione peroxidase (GSH-Px) in banana. After two applications of selenium (100 and 200 mg/plant) in the field, the TSe in banana pulps increased 23.7 to 25.9-fold and achieved the Se enrichment standard for food. The results demonstrate that selenium applications can safely augment root TSe levels, both reducing Fusarium wilt disease incidence and producing Se-enriched banana fruits. For the first time, this study has revealed that selenium can significantly reduce the damage caused by soil-borne pathogens in banana by increasing the activities of antioxidant enzymes and inhibiting fungal growth.

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