Genotype-Specific Synergy Between Arbuscular Mycorrhizal Fungi and Olive Cultivars Enhances Drought Resilience in China’s Olive Belt

IF 4.1 2区农林科学 Q1 AGRONOMY

Agronomy-Basel Pub Date : 2025-11-07 DOI:10.3390/agronomy15112568

Junlin Zhou, Yan Deng, Junfei Li, Zhou Xu, Bixia Wang, Xiao Xu, Chunyan Zhao

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Abstract

To address severe seasonal drought affecting over 60% of China’s olive-growing regions, this study evaluates whether arbuscular mycorrhizal fungi (AMF) can enhance drought tolerance in elite olive cultivars (Arbequina and Koroneiki) under simulated arid conditions. A controlled pot experiment inoculated seedlings with two AMF strains (Rhizophagus intraradices [AMF1], Funneliformis mosseae [AMF2]) under full irrigation or a 32-day water deficit. Biomass, root colonization, photosynthesis, PSII efficiency, osmolytes, antioxidants, and lipid peroxidation were measured. Data were analyzed via two-way ANOVA, Pearson’s correlation, and principal component analysis (PCA). Under optimal hydration, both AMF strains colonized >60% of roots, significantly increasing Arbequina biomass by 25–35% (p < 0.05) and Koroneiki biomass. Drought reversed benefits in Arbequina but triggered resilience: AMF1 restored photosynthesis (18%), Fv/Fm (37%), and water potential (18%) (p < 0.05) while reducing lipid peroxidation (79%) (p < 0.01). In Koroneiki, AMF2 restored Ψw to 47% of pre-irrigation levels and increased root volume (137%), PSII efficiency (43%), osmolytes (100%), and carotenoids (28%) (p < 0.01). PCA ranked Arbequina–drought–AMF1 as the most resilient combination. Pairing AMF strains with specific cultivars offers a scalable, chemical-free strategy to stabilize olive productivity in southwest China’s aridifying climate, advancing climate-smart agriculture for drought-prone regions.

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丛枝菌根真菌与橄榄树品种基因型特异性协同作用增强中国橄榄树带抗旱性

为了解决影响中国60%以上橄榄种植区的严重季节性干旱问题，本研究评估了丛枝菌根真菌（AMF）是否能在模拟干旱条件下提高优质橄榄品种（Arbequina和Koroneiki）的抗旱性。对照盆栽试验将两种AMF菌株（根噬菌（Rhizophagus intraradices） [AMF1]、mosseae (funeliformis mosseae) [AMF2]）在充分灌溉或32 d亏水条件下接种幼苗。测定生物量、根定植、光合作用、PSII效率、渗透物、抗氧化剂和脂质过氧化。数据通过双向方差分析、Pearson相关和主成分分析（PCA）进行分析。在最佳水化条件下，两株AMF定殖率均达到60%，显著提高了Arbequina生物量25-35% （p < 0.05）和Koroneiki生物量。干旱逆转了Arbequina的效益，但触发了恢复力：AMF1恢复了光合作用（18%）、Fv/Fm（37%）和水势（18%）（p < 0.05），同时降低了脂质过氧化（79%）（p < 0.01）。在Koroneiki， AMF2将Ψw恢复到灌溉前水平的47%，增加了根体积（137%），PSII效率（43%），渗透物（100%）和类胡萝卜素（28%）（p < 0.01）。PCA将Arbequina-drought-AMF1列为抗灾能力最强的组合。将AMF品系与特定品种配对提供了一种可扩展的、无化学物质的策略，以稳定中国西南干旱气候下的橄榄产量，促进干旱易发地区的气候智能型农业。

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来源期刊

Agronomy-Basel Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

6.20

自引率

13.50%

发文量

2665

审稿时长

20.32 days

期刊介绍： Agronomy (ISSN 2073-4395) is an international and cross-disciplinary scholarly journal on agronomy and agroecology. It publishes reviews, regular research papers, communications and short notes, and there is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental and/or methodical details must be provided for research articles.