Arbuscular mycorrhizal fungi improve photosynthetic energy use efficiency and decrease foliar construction cost under recurrent water deficit in woody evergreen species

Barros, Vanessa Andrade de; Frosi, Gabriella; Santos, Mariana; Ramos, Dalila de Brito Marques; Falcão, Hiram Marinho

doi:10.1016/j.plaphy.2018.04.016

Cited by 31 publications

(15 citation statements)

References 37 publications

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“…Increased SLA enhances the photosynthetic area and thus the leaf photosynthetic rate, which is conducive to the accumulation of photosynthetic products [61]. Similar results were also found in Cynophalla flexuosa [64] and wheat (Triticum spp.) [74], confirming that mycorrhizal inoculated plants are beneficial for the adaptation to arid environments.…”

Section: Discussionsupporting

confidence: 73%

“…Both inoculated and non-inoculated C. bungei seedlings subjected to drought stress had strongly reduced Gs, and consequently reduced photosynthesis. Reducing Gs to decrease the transpiration-induced water loss is a key strategy for maintaining adequate levels of tissue hydration and cell expansion to sustain growth and biomass production, even under water deficit conditions [64,65]. Studies have shown the Gs, Tr, and Pn of mycorrhizal inoculated plants to be higher than those of non-mycorrhizal treated plants under water deficit [8,47].…”

Section: Discussionmentioning

confidence: 99%

“…SLA is the main leaf functional trait connected with the nutrient retention capacity, which reflects the plant's ability to exploit and utilize the environmental resources [64,73]. SLA directly affects the assimilation of CO 2 and the light, water, and nutrient utilization efficiency [64].…”

Section: Discussionmentioning

confidence: 99%

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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: Discussionsupporting

confidence: 73%

Section: Discussionmentioning

confidence: 99%

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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 plants from both treatments presented lower SLA values (Table 3), meaning thicker leaves. Barros et al (2018) had similar results with mycorrhizal plants after few days of water stress. This can be interpreted as an hydraulic strategy to surpass the stress, as the decreased leaf area per leaf matter would be more efficient controlling water loss under water deficit conditions (Erice, Louahlia, Irigoyen, Sanchez-Diaz, & Avice, 2010).…”

Section: Mycorrhizal Plants Showed a Higher Photosynthetic Efficiensupporting

confidence: 65%

The arbuscular mycorrhizal symbiosis regulates aquaporins activity and improves root cell water permeability in maize plants subjected to water stress

Quiroga

Erice

Ding

et al. 2019

Plant Cell & Environment

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Studies have suggested that increased root hydraulic conductivity in mycorrhizal roots could be the result of increased cell‐to‐cell water flux via aquaporins. This study aimed to elucidate if the key effect of the regulation of maize aquaporins by the arbuscular mycorrhizal (AM) symbiosis is the enhancement of root cell water transport capacity. Thus, water permeability coefficient (Pf) and cell hydraulic conductivity (Lpc) were measured in root protoplast and intact cortex cells of AM and non‐AM plants subjected or not to water stress. Results showed that cells from droughted‐AM roots maintained Pf and Lpc values of nonstressed plants, whereas in non‐AM roots, these values declined drastically as a consequence of water deficit. Interestingly, the phosphorylation status of PIP2 aquaporins increased in AM plants subjected to water deficit, and Pf values higher than 12 μm s−1 were found only in protoplasts from AM roots, revealing the higher water permeability of AM root cells. In parallel, the AM symbiosis increased stomatal conductance, net photosynthesis, and related parameters, showing a higher photosynthetic capacity in these plants. This study demonstrates a better performance of AM root cells in water transport under water deficit, which is connected to the shoot physiological performance in terms of photosynthetic capacity.

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“…Recently, the role of AMF inoculation to alleviate drought stress has been receiving great attention [39]. Mycorrhizal association with host plants increases the hydration status at whole-plant level, as characterized by leaf relative water content (LRWC) [40,41], while a detailed review of the literature shows that leaf water potential was not static in some experiments [42,43] (Table 1). Although the AMF colonization-mediated adaptive mechanisms in plants have been firmly established, several questions still remain open.…”

Section: Amf and Host Plant Association During Drought Stressmentioning

confidence: 99%

Mechanistic Insights into Arbuscular Mycorrhizal Fungi-Mediated Drought Stress Tolerance in Plants

Bahadur

Batool

Nasir

et al. 2019

IJMS

181

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Arbuscular mycorrhizal fungi (AMF) establish symbiotic interaction with 80% of known land plants. It has a pronounced impact on plant growth, water absorption, mineral nutrition, and protection from abiotic stresses. Plants are very dynamic systems having great adaptability under continuously changing drying conditions. In this regard, the function of AMF as a biological tool for improving plant drought stress tolerance and phenotypic plasticity, in terms of establishing mutualistic associations, seems an innovative approach towards sustainable agriculture. However, a better understanding of these complex interconnected signaling pathways and AMF-mediated mechanisms that regulate the drought tolerance in plants will enhance its potential application as an innovative approach in environmentally friendly agriculture. This paper reviews the underlying mechanisms that are confidently linked with plant–AMF interaction in alleviating drought stress, constructing emphasis on phytohormones and signaling molecules and their interaction with biochemical, and physiological processes to maintain the homeostasis of nutrient and water cycling and plant growth performance. Likewise, the paper will analyze how the AMF symbiosis helps the plant to overcome the deleterious effects of stress is also evaluated. Finally, we review how interactions between various signaling mechanisms governed by AMF symbiosis modulate different physiological responses to improve drought tolerance. Understanding the AMF-mediated mechanisms that are important for regulating the establishment of the mycorrhizal association and the plant protective responses towards unfavorable conditions will open new approaches to exploit AMF as a bioprotective tool against drought.

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Arbuscular mycorrhizal fungi improve photosynthetic energy use efficiency and decrease foliar construction cost under recurrent water deficit in woody evergreen species

Cited by 31 publications

References 37 publications

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

The arbuscular mycorrhizal symbiosis regulates aquaporins activity and improves root cell water permeability in maize plants subjected to water stress

Mechanistic Insights into Arbuscular Mycorrhizal Fungi-Mediated Drought Stress Tolerance in Plants

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