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Acta Horticulturae Sinica ›› 2026, Vol. 53 ›› Issue (7): 2169-2184.doi: 10.16420/j.issn.0513-353x.2026-0251

• Cultivation · Physiology & Biochemistry • Previous Articles     Next Articles

Physiological and Ecological Mechanisms of Trichoderma asperellum in Enhancing Drought Resistance of Banana Plants

ZHANG Miaoyi1, YAN Kun1,2, WANG Wei1, ZHAO Yankun1, LI Kai1, CHEN Yufeng1, FENG Junting1,**(), XIE Jianghui1,**()   

  1. 1 Sanya Research InstituteInstitute of Tropical Biotechnology,National Key Laboratory of Biological Breeding of Tropical Crops,Chinese Academy of Tropical Agricultural Sciences,Sanya, Hainan 570100, China
    2 College of HorticultureChina Agricultural University, Beijing 100193, China
  • Received:2026-04-10 Revised:2026-06-07 Online:2026-07-25 Published:2026-07-23
  • Contact: FENG Junting, XIE Jianghui

Abstract:

This study investigated the physiological and microecological mechanisms by which Trichoderma asperellum M7 enhances drought tolerance in banana using physiological and biochemical assays,gene expression analysis,and microbiome technology. The results showed that M7 inoculation significantly increased the activities of superoxide dismutase(SOD),peroxidase(POD),and catalase(CAT)in leaf. The strain treatment also elevated proline and soluble sugar contents,reduced malondialdehyde(MDA)accumulation,and promoted the synthesis of abscisic acid(ABA)and auxin(IAA)in roots,thereby effectively alleviating the inhibitory effects of drought on seedling growth. Gene expression analysis revealed that the M7 significantly up-regulated transcript levels of ABA biosynthesis genes(MaAOMaNCED2),a signal transduction gene(MaSnRK2-11),and an aquaporin gene(MaPIP1;1). Furthermore,compared with the sterilized soil treated with M7,the natural soil significantly enriched beneficial microorganisms such as PseudomonasNitrosococcus,and Streptomyces. Through core microbe isolation and reconnection verification experiments,it was found that the composite microbial community could effectively enhance the drought-resistant phenotype of plants,and some of the microorganisms alone also had certain effects. In conclusion,M7 inoculation was associated with enhanced drought tolerance in banana,which correlated with direct modulation of host physiological responses and drought-responsive gene expression,as well as indirect reshaping of the beneficial rhizosphere microbial community,suggesting a synergistic effect.

Key words: banana, drought stress, Trichoderma asperellum, physiological regulation, rhizosphere microorganisms