https://www.ahs.ac.cn/images/0513-353X/images/top-banner1.jpg|#|苹果
https://www.ahs.ac.cn/images/0513-353X/images/top-banner2.jpg|#|甘蓝
https://www.ahs.ac.cn/images/0513-353X/images/top-banner3.jpg|#|菊花
https://www.ahs.ac.cn/images/0513-353X/images/top-banner4.jpg|#|灵芝
https://www.ahs.ac.cn/images/0513-353X/images/top-banner5.jpg|#|桃
https://www.ahs.ac.cn/images/0513-353X/images/top-banner6.jpg|#|黄瓜
https://www.ahs.ac.cn/images/0513-353X/images/top-banner7.jpg|#|蝴蝶兰
https://www.ahs.ac.cn/images/0513-353X/images/top-banner8.jpg|#|樱桃
https://www.ahs.ac.cn/images/0513-353X/images/top-banner9.jpg|#|观赏荷花
https://www.ahs.ac.cn/images/0513-353X/images/top-banner10.jpg|#|菊花
https://www.ahs.ac.cn/images/0513-353X/images/top-banner11.jpg|#|月季
https://www.ahs.ac.cn/images/0513-353X/images/top-banner12.jpg|#|菊花

园艺学报 ›› 2025, Vol. 52 ›› Issue (9): 2410-2424.doi: 10.16420/j.issn.0513-353x.2024-0858

• 栽培·生理生化 • 上一篇    下一篇

丛枝菌根真菌对苹果品种耐盐碱的影响及缓解机理

杜丽君, 刘英材, 史妍妍, 汪洋, 李春晖, 何银涛, 王旭, 边传杰, 张满让*()   

  1. 西北农林科技大学园艺学院, 陕西杨凌 712100
  • 收稿日期:2025-01-24 修回日期:2025-03-15 出版日期:2025-09-25 发布日期:2025-09-24
  • 通讯作者:
    * E-mail:
  • 基金资助:
    现代农业产业技术体系建设专项资助(CARS-27)

Effect of Arbuscular Mycorrhizal Fungi on the Growth and Mechanism of Different Apple Cultivar Under Salt-Alkali Stress

DU Lijun, LIU Yingcai, SHI Yanyan, WANG Yang, LI Chunhui, HE Yintao, WANG Xu, BIAN Chuanjie, ZHANG Manrang*()   

  1. College of HorticultureNorthwest A & F University,Yangling, Shaanxi 712100, China
  • Received:2025-01-24 Revised:2025-03-15 Published:2025-09-25 Online:2025-09-24

摘要:

为探究接种丛枝菌根真菌(AMF)对盐碱胁迫下苹果嫁接苗生长的影响及其作用机理,以1年生‘秦脆’和‘瑞雪’嫁接盆苗(砧木M26)为试材,设置对照(清水灌溉)、盐碱胁迫(0.2 mol · L-1 NaHCO3NaCl = 11,SA)、接种AMF(接种根内球囊霉,AMF)和SA + AMF(提前60 d接种AMF,再浇灌SA)处理。SA处理显著降低了‘秦脆’和‘瑞雪’的株高、茎粗、新梢生长量、根面积、根长、根体积以及叶绿素含量和光合速率,而接种AMF缓解了盐碱胁迫对苹果幼苗造成的伤害;与SA处理相比,SA + AMF处理‘秦脆’和‘瑞雪’的抗氧化酶活性显著升高,‘秦脆’叶片的POD、SOD和CAT活性分别升高了28.27%、48.72%和37.01%,而‘瑞雪’叶片POD、SOD和CAT活性分别升高了12.75%、23.37%和16.10%,并且叶片和根系的MDA含量均显著下降;‘秦脆’和‘瑞雪’的TTC还原强度分别升高71.40%和34.29%,根系柠檬酸含量分别增长了105.26%和122.22%,AMF通过促进柠檬酸的分泌来降低根系pH,增强了‘秦脆’和‘瑞雪’的耐盐碱性。盐碱条件下AMF共生降低了叶片中Na+含量,根系和叶片中的K+含量进一步上升,Na+/K+比值显著下降,其中‘秦脆’根系的Na+/K+比值恢复到了对照水平。可见,接种AMF能够促进苗木树势的恢复,增加根系活力、叶绿素含量和光合速率,调节Na+/K+比率来维持离子平衡,减少盐碱胁迫对植株造成的离子毒害,通过增强植株的SOD、POD和CAT活性来减少活性氧的积累,减少植株所受到的氧化损伤。此外,盐碱胁迫下AMF通过增加柠檬酸分泌来平衡根系pH,减少根系受到的pH胁迫,以此来缓解盐碱胁迫对植株造成的生长抑制。

关键词: 苹果, 丛枝菌根真菌, 盐碱胁迫, 离子稳态, 氧化损伤

Abstract:

To investigate the effects and mechanisms of the arbuscular mycorrhizal fungi(AMF)on the growth of apple grafted under salt-alkali stress,‘Qincui’and‘Ruixue’as experimental materials was grafted on M26. The experiment included four treatment groups:the control(CK,Irrigated with water),the salinity-alkality(0.2 mol · L-1 NaHCO3NaCl = 11,SA),inoculation with AMF(Inoculated with Glomus intraradices,AMF),and SA + AMF(inoculation with AMF 60 d in advance,followed by watering with SA). SA treatment significantly reduced plant height,stem diameter,shoot growth,root area,root length,root volume,chlorophyll content,and photosynthetic rate in‘Qincui’ and‘Ruixue’apple seedlings,however,AMF inoculation alleviated the growth inhibition caused by salt-alkali stress. Compared with SA treatment,the SA + AMF treatment significantly enhanced the activities of antioxidant enzymes(POD,SOD,and CAT)in‘Qincui’and‘Ruixue’. In‘Qincui’leaves,POD,SOD,and CAT activities increased by 28.27%,48.72%,and 37.01%,respectively,while in‘Ruixue’,these activities increased by 12.75%,23.37%,and 16.10%,and MDA content in leaves and roots significantly decreased. Compared with SA treatment,the SA + AMF treatment significantly enhanced TTC reduction intensity of‘Qincui’and‘Ruixue’increased by 71.40% and 34.29%,the root citrate content increased by 105.26% and 122.22%,respectively. AMF facilitated citrate secretion,thereby reducing root pH and enhancing the salt-alkali tolerance of‘Qincui’and‘Ruixue’. Under salt-alkali stress,AMF symbiosis decreased Na+ content in the leaves,while K+ content in both roots and leaves increased,leading to a significant reduction in the Na+/K+ ratio. Notably,the Na+/K+ ratio in the roots of‘Qincui’returned to control levels. These findings indicate that AMF inoculation promotes seedling vigor,root activity,chlorophyll content,and photosynthetic rate. Inaddition,AMF regulates the Na+/K+ ratio to maintain ion homeostasis,thereby mitigating ion toxicity caused by salt-alkali stress. Moreover,AMF enhanced the activities of antioxidant enzymes(SOD,POD and CAT),thereby reducing reactive oxygen species(ROS)accumulation and oxidative damage. Under salt-alkali stress,AMF also increases citrate secretion,which maintain balance of root pH and alleviates pH stress,further mitigating the growth inhibition caused by salt-alkali conditions.

Key words: apple, arbuscular mycorrhizal fungi, saline-alkalini stress, ion homeostasis, oxidative damage