Influences of AM fungi on plant growth and water-stable soil aggregates under drought stresses

Jiashu, 叶佳舒 Ye; Tao, 李涛 Li; Yajun, 胡亚军 Hu; Zhipeng, 郝志鹏 Hao; Gao, Yanzheng; Youshan, 王幼珊 Wang; Chen, Baodong

doi:10.5846/stxb201205140707

Cited by 5 publications

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“…In addition, to ensure the transportation of water into the mycelium, it can seal the AMF extraradical hyphae in the rhizosphere soil [7], improve soil environment (enter the soil along with the degradation of fungal biomass), which can enhance soil stability, porous structure and moisture penetration, and provide necessary space and improved gas exchange channels for plant root growth [41,50]. Most studies suggest that T-GRSP is a stable glycoprotein accumulated by AMF over a long period of time, while EE-GRSP is a newly produced glycoprotein [102]. In this study, we found no detectable changes in the EE-GRSP and T-GRSP levels in the rhizosphere soil without AMF inoculation upon the aggravation of drought stress.…”

Section: Discussionmentioning

confidence: 99%

Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei C.A.Mey. under Drought Stress

Chen

Meng

Feng

et al. 2020

Forests

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Catalpa bungei C.A.Mey. is a common ornamental timber species. Its survival and growth are greatly affected by water scarcity in arid and semi-arid areas of Northwest China. Evidence suggests arbuscular mycorrhizal fungus (AMF) may improve plant drought resistance. However, there is limited information on the systematic effects of AMF on drought resistance in C. bungei seedlings. Here, a pot experiment was used to explore the effects of inoculation with the AMF Rhizophagus intraradices on the growth and physiological performance of C. bungei under different water treatment conditions. Three water levels and two mycorrhizal inoculation treatments were used with factorial design. The results showed that drought stress noticeably affected the growth and physiological performance of C. bungei seedlings. However, inoculation with R. intraradices significantly ameliorated the growth, and alleviated the effects of drought stress. The growth parameters of AMF-inoculated seedlings significantly increased regardless of water status. AMF changed the biomass allocation in seedlings by reducing the root mass ratio (RMR) and root/shoot ratio. AMF-inoculated seedlings displayed higher gas exchange parameters, photosynthetic pigment concentrations, specific leaf area (SLA), but lower specific leaf weight (SLW), regardless of water status. AMF alleviated drought-induced oxidative stress by attenuating the excess generation of reactive oxygen species (ROS), especially H2O2 and O2−, in leaves. Inoculation with AMF under drought stress also dramatically augmented indole-3-acetic acid (IAA) and gibberellins (GA3) levels and the IAA/abscisic acid (ABA) and GA3/ABA ratios, but reduced ABA and zeatin (ZT) levels in leaves. AMF symbiosis improved root morphology and promoted the absorption of nitrogen (N) and phosphorus (P) in seedlings. We conclude that inoculation with R. intraradices is potentially useful for afforestation and cultivation of C. bungei in Northwest China. Furthermore, AMF improved soil structure by increasing the glomalin-related soil protein (GRSP) contents and the proportion of macro-aggregates (0.25–0.5 mm) in the rhizosphere soil.

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Section: Discussionmentioning

confidence: 99%

Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei C.A.Mey. under Drought Stress

Chen

Meng

Feng

et al. 2020

Forests

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“…Mycorrhizal extraradical hyphae also directly contribute to the dispersive energy in the formation of soil macroaggregates under DS conditions ( Ji et al, 2019 ). Inoculation of Medicago sativa plants with AM fungi accelerated the formation of large soil aggregates and the stability of water-stable aggregates under DS conditions, thus, improving soil structure ( Ye et al, 2013 ). Collective studies indicate that the water content of plants increases in mycorrhizal substrates under both water-saturated and DS soil conditions ( Bitterlich et al, 2018 ).…”

Section: Drought-stress Adaptive Mechanisms Induced In Plants By Arbuscular Mycorrhizal Fungimentioning

confidence: 99%

Elucidating the Mechanisms Underlying Enhanced Drought Tolerance in Plants Mediated by Arbuscular Mycorrhizal Fungi

et al. 2021

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Plants are often subjected to various environmental stresses during their life cycle, among which drought stress is perhaps the most significant abiotic stress limiting plant growth and development. Arbuscular mycorrhizal (AM) fungi, a group of beneficial soil fungi, can enhance the adaptability and tolerance of their host plants to drought stress after infecting plant roots and establishing a symbiotic association with their host plant. Therefore, AM fungi represent an eco-friendly strategy in sustainable agricultural systems. There is still a need, however, to better understand the complex mechanisms underlying AM fungi-mediated enhancement of plant drought tolerance to ensure their effective use. AM fungi establish well-developed, extraradical hyphae on root surfaces, and function in water absorption and the uptake and transfer of nutrients into host cells. Thus, they participate in the physiology of host plants through the function of specific genes encoded in their genome. AM fungi also modulate morphological adaptations and various physiological processes in host plants, that help to mitigate drought-induced injury and enhance drought tolerance. Several AM-specific host genes have been identified and reported to be responsible for conferring enhanced drought tolerance. This review provides an overview of the effect of drought stress on the diversity and activity of AM fungi, the symbiotic relationship that exists between AM fungi and host plants under drought stress conditions, elucidates the morphological, physiological, and molecular mechanisms underlying AM fungi-mediated enhanced drought tolerance in plants, and provides an outlook for future research.

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Changes in soil physical and chemical properties after short drought stress in semi-humid forests

et al. 2019

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Influences of AM fungi on plant growth and water-stable soil aggregates under drought stresses

Cited by 5 publications

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Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei C.A.Mey. under Drought Stress

Effects of Arbuscular Mycorrhizal Fungi on Growth and Physiological Performance of Catalpa bungei C.A.Mey. under Drought Stress

Elucidating the Mechanisms Underlying Enhanced Drought Tolerance in Plants Mediated by Arbuscular Mycorrhizal Fungi

Changes in soil physical and chemical properties after short drought stress in semi-humid forests

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