Insights on the Impact of Arbuscular Mycorrhizal Symbiosis on
            <i>Eucalyptus grandis</i>
            Tolerance to Drought Stress

Wang, Sijia; Ren, Ying; Han, Lizhen; Nie, Yuying; Zhang, Shuyuan; Xie, Xianan; Hu, Wentao; Chen, Hui; Tang, Ming

doi:10.1128/spectrum.04381-22

Cited by 6 publications

(2 citation statements)

References 84 publications

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“…AMF can cope with environmental stresses by establishing a symbiotic relationship with the host and exchanging nutrients with the host while mobilizing enzyme metabolism systems in the plant to improve plant resistance ( Wang et al, 2023 ). Although no study has shown that AMF can reduce the persecutory effects of P deficiency on plant growth, the AMF-inoculated plants in this study will have lower levels of MDA and higher protease activities relative to plants without AMF symbiosis, and R.i -inoculated Chinese fir will have higher SOD and CAT enzyme activities relative to F.m .…”

Section: Discussionmentioning

confidence: 99%

Effect of arbuscular mycorrhizal symbiosis on growth and biochemical characteristics of Chinese fir (Cunninghamia lanceolata) seedlings under low phosphorus environment

Tian,

Xu,

et al. 2024

PeerJ

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Background The continuous establishment of Chinese fir (Cunninghamia lanceolata) plantations across multiple generations has led to the limited impact of soil phosphorus (P) on tree growth. This challenge poses a significant obstacle in maintaining the sustainable management of Chinese fir. Methods To investigate the effects of Arbuscular mycorrhizal fungi (AMF) on the growth and physiological characteristics of Chinese fir under different P supply treatments. We conducted an indoor pot simulation experiment in the greenhouse of the Forestry College of Fujian Agriculture and Forestry University with one-and-half-year-old seedlings of Chinese fir from March 2019 to June 2019, with the two P level treatment groups included a normal P supply treatment (1.0 mmol L−1 KH2PO4, P1) and a no P supply treatment (0 mmol L−1 KH2PO4, P0). P0 and P1 were inoculated with Funneliformis mosseae (F.m) or Rhizophagus intraradices (R.i) or not inoculated with AMF treatment. The AMF colonization rate in the root system, seedling height (SH), root collar diameter (RCD) growth, chlorophyll (Chl) photosynthetic characteristics, enzyme activities, and endogenous hormone contents of Chinese fir were estimated. Results The results showed that the colonization rate of F.m in the roots of Chinese fir seedlings was the highest at P0, up to 85.14%, which was 1.66 times that of P1. Under P0 and P1 treatment, root inoculation with either F.m or R.i promoted SH growth, the SH of R.i treatment was 1.38 times and 1.05 times that of F.m treatment, respectively. In the P1 treatment, root inoculation with either F.m or R.i inhibited RCD growth. R.i inhibited RCD growth more aggressively than F.m. In the P0 treatment, root inoculation with F.m and R.i reduced the inhibitory effect of phosphorus deficiency on RCD. At this time, there was no significant difference in RCD between F.m, R.i and CK treatments (p < 0.05). AMF inoculation increased Fm, Fv, Fv/Fm, and Fv/Fo during the chlorophyll fluorescence response in the tested Chinese fir seedlings. Under the two phosphorus supply levels, the trend of Fv and Fm of Chinese fir seedlings in different treatment groups was F.m > R.i > CK. Under P0 treatment, The values of Fv were 235.86, 221.86 and 147.71, respectively. The values of Fm were 287.57, 275.71 and 201.57, respectively. It increased the antioxidant enzyme activity and reduced the leaf’s malondialdehyde (MDA) content to a certain extent. Conclusion It is concluded that AMF can enhance the photosynthetic capacity of the host, regulate the distribution of endogenous hormones in plants, and promote plant growth by increasing the activity of antioxidant enzymes. When the P supply is insufficient, AMF is more helpful to plants, and R.i is more effective than F.m in alleviating P starvation stress in Chinese fir.

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Section: Discussionmentioning

confidence: 99%

Effect of arbuscular mycorrhizal symbiosis on growth and biochemical characteristics of Chinese fir (Cunninghamia lanceolata) seedlings under low phosphorus environment

Tian,

Xu,

et al. 2024

PeerJ

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“…Over the past decades, studies have indicated that AM fungi enhance the drought tolerance by regulating plant physiological and molecular response (Chitarra et al ., 2016; Cheng et al ., 2021; Wang et al ., 2023a). The AM symbiosis regulates photosynthesis, stomatal conductance, antioxidant substance content (Aalipour et al ., 2020; Begum et al ., 2020; He et al ., 2020; Zou et al ., 2021), functional genes expression (such as aquaporin genes) and module the movement of water in mycorrhizal plant under drought stress (Li et al ., 2013; Bárzana et al ., 2014).…”

Section: Introductionmentioning

confidence: 99%

The receptor kinase RiSho1 in Rhizophagus irregularis regulates arbuscule development and drought tolerance during arbuscular mycorrhizal symbiosis

Wang,

Han,

Ren

et al. 2024

New Phytologist

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Summary In terrestrial ecosystems, most plant species can form beneficial associations with arbuscular mycorrhizal (AM) fungi. Arbuscular mycorrhizal fungi benefit plant nutrient acquisition and enhance plant tolerance to drought. The high osmolarity glycerol 1 mitogen‐activated protein kinase (HOG1‐MAPK) cascade genes have been characterized in Rhizophagus irregularis. However, the upstream receptor of the HOG1‐MAPK cascade remains to be investigated. We identify the receptor kinase RiSho1 from R. irregularis, containing four transmembrane domains and one Src homology 3 (SH3) domain, corresponding to the homologue of Saccharomyces cerevisiae. Higher expression levels of RiSho1 were detected during the in planta phase in response to drought. RiSho1 protein was localized in the plasma membrane of yeast, and interacted with the HOG1‐MAPK module RiPbs2 directly by protein–protein interaction. RiSho1 complemented the growth defect of the yeast mutant ∆sho1 under sorbitol conditions. Knock‐down of RiSho1 led to the decreased expression of downstream HOG1‐MAPK cascade (RiSte11, RiPbs2, RiHog1) and drought‐resistant genes (RiAQPs, RiTPSs, RiNTH1 and Ri14‐3‐3), hampered arbuscule development and decreased plants antioxidation ability under drought stress. Our study reveals the role of RiSho1 in regulating arbuscule development and drought‐resistant genes via the HOG1‐MAPK cascade. These findings provide new perspectives on the mechanisms by which AM fungi respond to drought.

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Exploring the synergy of microbes and plants: a promising strategy for managing moisture stress in medicinal and aromatic crops

Bhattacharjee,

Nath,

Bhattacharjee

et al. 2024

Microbial Biostimulants for Plant Growth and Abiotic Stress Amelioration

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Insights on the Impact of Arbuscular Mycorrhizal Symbiosis on Eucalyptus grandis Tolerance to Drought Stress

Abstract: Arbuscular mycorrhizal (AM) fungi play an important role in improving plant growth and development under drought stress. The MAPK cascade may regulate many physiological and biochemical processes in plants in response to drought stress.

Cited by 6 publications

References 84 publications

Effect of arbuscular mycorrhizal symbiosis on growth and biochemical characteristics of Chinese fir (Cunninghamia lanceolata) seedlings under low phosphorus environment

Effect of arbuscular mycorrhizal symbiosis on growth and biochemical characteristics of Chinese fir (Cunninghamia lanceolata) seedlings under low phosphorus environment

The receptor kinase RiSho1 in Rhizophagus irregularis regulates arbuscule development and drought tolerance during arbuscular mycorrhizal symbiosis

Exploring the synergy of microbes and plants: a promising strategy for managing moisture stress in medicinal and aromatic crops

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