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Indigenous arbuscular mycorrhizal fungi enhance resistance of apple rootstock ‘M9T337’ to apple replant disease
Physiological and Molecular Plant Pathology ( IF 2.7 ) Pub Date : 2021-09-07 , DOI: 10.1016/j.pmpp.2021.101717
Mei Wang 1 , Rong Zhang 1 , Lei Zhao 1 , Haiyan Wang 1 , Xuesen Chen 1 , Zhiquan Mao 1 , Chengmiao Yin 1
Affiliation  

Apple replant disease is common in apple cultivation, leading to decay and necrosis of the root tip, growth retardation, and even death of the plant. Biological control, inducing activation of the plant's defense systems, is a promising alternative strategy for controlling the disease. In this study, we used the common rootstock ‘M9T337’ as the test material and harvested the plants at 60 and 120 days after transplantation. We investigated the physiological effects of inoculating the soil with indigenous arbuscular mycorrhizal fungi (AMF) to improve the resistance of the apple rootstock under replant conditions. The Glomus sp. and Paraglomus sp. acted as the major fungal species in QX and LZ. The results showed that inoculation of indigenous AMF increased the biomass of the plants and promoted root growth under replanting conditions. The antioxidant and defense-related enzyme activities in the plants were significantly raised, including the activities of the enzymes superoxide dismutase, peroxidase, catalase, ascorbate peroxidase, phenylalanine ammonia-lyase, and polyphenol oxidase. In the seedling root system, the H2O2 content and O2· production were reduced, resulting in decreased lipid oxidation. Indigenous AMF treatment also induced the activity of chitinase and β-1,3-glucanase. This suggests that inoculation of indigenous AMF enhances the resistance of apple rootstock by regulating root reactive oxygen species levels and the antioxidant system under replanting conditions. This provides a theoretical basis for the prevention and treatment of apple replant disease.



中文翻译:

本土丛枝菌根真菌增强苹果砧木'M9T337'对苹果再植病害的抗性

苹果再植病在苹果栽培中很常见,导致根尖腐烂坏死,生长迟缓,甚至植株死亡。诱导植物防御系统激活的生物控制是控制疾病的一种有前途的替代策略。在这项研究中,我们使用常见的砧木“M9T337”作为试验材料,并在移植后 60 天和 120 天收获植物。我们研究了在土壤中接种本土丛枝菌根真菌 (AMF) 以提高苹果砧木在再植条件下的抗性的生理效应。该菌根菌。和Paraglomussp. 是QX和LZ的主要真菌物种。结果表明,接种本地 AMF 增加了植物的生物量,促进了再植条件下的根系生长。植物的抗氧化和防御相关酶活性显着提高,包括超氧化物歧化酶、过氧化物酶、过氧化氢酶、抗坏血酸过氧化物酶、苯丙氨酸解氨酶和多酚氧化酶的活性。在幼苗根系中,H 2 O 2含量和O 2 · -产量减少,导致脂质氧化减少。土著 AMF 处理还诱导了几丁质酶和 β-1,3-葡聚糖酶的活性。这表明接种本地 AMF 可通过调节再植条件下根系活性氧水平和抗氧化系统来增强苹果砧木的抗性。这为苹果再植病害的防治提供了理论依据。

更新日期:2021-09-12
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