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Effects of Different Forms of Tagetes erecta Biofumigation on the Growth of Apple Seedlings and Replanted Soil Microbial Environment

Authors :
Xiaofang Wang
Kang Li
Shaozhuo Xu
Yanan Duan
Haiyan Wang
Chengmiao Yin
Xuesen Chen
Zhiquan Mao
Kun Xiang
Source :
Horticulturae, Vol 8, Iss 7, p 633 (2022)
Publication Year :
2022
Publisher :
MDPI AG, 2022.

Abstract

Apple replant disease (ARD) is a common soil disease that occurs in apple-growing areas around the world, causing root tip rot and necrosis, plant growth retardation and even plant death. Biofumigation is a promising strategy for controlling ARD due to its advantages of convenient application and being environmentally friendly. Tagetes erecta is an effective biological fumigant, but its effect on ARD is unclear. In the present study, we used Malus hupehensis Rehd. seedlings as the test material to detect the mitigating effects of different forms of T. erecta: air-dried sample (DS), fresh samples (FS) and fresh sample infusion solution (IS) on ARD. The effects of different forms of T. erecta on the growth of apple seedlings, leaf photosynthesis, root antioxidant enzyme, soil enzymatic activity and microbial environment were investigated. Compared with the CK treatments, DS, FS, and IS treatments all significantly increased the biomass of apple seedlings and promoted root growth under replanting conditions. Among them, DS showed the best results. The activity of antioxidant enzyme including superoxide dismutase, peroxidase and catalase were significantly increased in roots grown in soils treated with T. erecta. Moreover, T. erecta treatment also increased the activity of soil urease, phosphatase, sucrase and catalase enzyme, significantly altered the abundance of soil fungal communities and, in particular, reduced the abundance of Fusarium oxysporum, the main causal fungus of ARD. Therefore, our results suggest that biofumigation of different forms of T. erecta enhanced the resistance of ARD by regulating root reactive oxygen levels and improving the soil fungal communities.

Details

Language :
English
ISSN :
23117524
Volume :
8
Issue :
7
Database :
Directory of Open Access Journals
Journal :
Horticulturae
Publication Type :
Academic Journal
Accession number :
edsdoj.9901f3149d1247d9b4481d709ce48166
Document Type :
article
Full Text :
https://doi.org/10.3390/horticulturae8070633