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园艺学报 ›› 2026, Vol. 53 ›› Issue (7): 2169-2184.doi: 10.16420/j.issn.0513-353x.2026-0251

• 栽培 · 生理生化 • 上一篇    下一篇

棘孢木霉提高香蕉抗旱的生理生态机制

张妙宜1,*, 燕昆1,2,*, 王尉1, 赵炎坤1, 李凯1, 陈宇丰1, 冯筠庭1,**(), 谢江辉1,**()   

  1. 1 中国热带农业科学院三亚研究院热带生物技术研究所,热带作物生物育种全国重点实验室, 海南三亚 570100
    2 中国农业大学园艺学院, 北京 100193
  • 收稿日期:2026-04-10 修回日期:2026-06-07 出版日期:2026-07-25 发布日期:2026-07-23
  • 通讯作者:
  • 作者简介:

    * 共同第一作者

  • 基金资助:
    三亚崖州湾科技城科技专项资助(SKJC-JYRC-2024-78); 全国重点实验室PI项目(NKLTCBCXTD27); 中国热带农业科学院基本业务费项目(1630052022006); 现代农业产业技术体系建设专项资助(CARS-31)

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 Published:2026-07-25 Online:2026-07-23

摘要:

以前期分离具有多重功能的棘孢木霉M7(Trichoderma asperellum M7)为研究对象,通过生理生化测定、基因表达分析及微生物组学技术,探究其提升香蕉抗旱能力的生理与生态机制。结果表明,接种M7显著提高叶片超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)的活性,增加脯氨酸和可溶性糖含量,降低丙二醛(MDA)积累,并促进根系脱落酸(ABA)与生长素(IAA)合成,有效缓解了干旱对幼苗生长的抑制。基因表达分析显示,接种后ABA生物合成基因(MaAOMaNCED2)、信号转导基因(MaSnRK2-11)及水通道蛋白基因(MaPIP1;1)的表达水平显著上调。此外,与接种M7的灭菌土壤处理相比,自然土壤中显著富集了假单胞菌属(Pseudomonas)、亚硝化球菌属(Nitrosococcus)和链霉菌属(Streptomyces)等有益微生物。通过核心微生物分离和回接验证试验,发现复合微生物群落可有效提高植株的抗旱性,其中部分微生物单独接种也有一定作用。综上,棘孢木霉M7通过直接调控宿主生理生化与抗旱基因表达,以及间接重塑根际有益微生物群落,协同增强香蕉抗旱能力。

关键词: 香蕉, 干旱胁迫, 棘孢木霉, 生理调控, 根际微生物

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