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Wilt caused by Fusarium oxysporum f. sp. Cubense is currently the most serious disease affecting the sustainable and healthy development of the global banana industry. To screen superior arbuscular mycorrhizal (AM) fungi that significantly promote the growth and disease resistance of banana tissue culture seedlings, this study compared the effects of five dominant AM fungi isolated from the main banana producing areas in Guangxi on the growth and Fusarium wilt of banana tissue culture seedlings under pot conditions. The results showed that the mycorrhizal infection rate of banana tissue culture seedlings inoculated with AM fungi ranged from 15.00% to 95.00%, they were as follows: BNMJ-1 (C. etunicatum) > BNTJ-6 (G. mosseae) > HTJ2-60 (C. lamellosum) > BDQJ-2 (G. fulvum) > GZXJ-10 (Paraglomus sp.). All the inoculation treatments significantly promoted the growth of banana tissue culture seedlings except for the GZXJ-10 treatment, and the results of membership function comprehensive analysis showed that the BNMJ-1 treatment had the most significant growth-promoting effect, which increased plant height, stem diameter, number of leaves, maximum root length and total biomass by 68.60%, 44.54%, 40.67%, 12.05% and 65.15%, respectively, compared with the control, followed by the BNTJ-6 treatment. BNMJ-1 treatment was the most effective in wilt control, followed by BNTJ-6 treatment, which decreased the disease index by 93.37% and 89.03% compared to the control and the preventive efficacy reached 93.64% and 88.85%. In summary, among the five AM fungi for testing, the strains with better disease-promoting resistance to banana seedlings grown in tissue culture were BNMJ-1 and BNTJ-6. Therefore, screening to obtain the advantageous AM fungal strains for banana tissue culture seedlings lays the foundation for the later development of banana mycorrhizal seedlings as well as special mycorrhizal fungal fungicides and fungal fertilizers.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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