Inoculation of Sunflower with Endophytic Fungi Alters Soil Physio-Chemical Properties to Nullify Drought Stress

Seema, Nighat; Hamayun, Muhammad; Ara, Husan; Khan, Raham Sheer

doi:10.17582/journal.sja/2019/35.1.109.115

Cited by 3 publications

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“…Thus, understanding fungal responses to drought may be especially critical for predicting future communities under climate change. Third, fungal symbionts could affect plant sensitivity to (or recovery from) drought and thereby influence primary production (Elmi & West, 1995; Gehring et al., 2017; Seema et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

“…In one dryland study, ectomycorrhizal fungal communities were reduced to a few dominant species during a natural drought event; however, these taxa were more, not less, beneficial to plants than was the pre‐drought community (Gehring et al., 2014). Since some fungi are known to ameliorate the effects of drought on plants (Ganjeali et al., 2018; Johnson et al., 2014; Kivlin et al., 2013; Seema et al., 2019), changes to root‐associated fungal composition could feed back to alter plant fitness in future climates. The few tests for drought effects on plant–microbe feedbacks return conflicting results.…”

Section: Introductionmentioning

confidence: 99%

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Experimental drought re‐ordered assemblages of root‐associated fungi across North American grasslands

et al. 2020

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Plant‐associated fungi can ameliorate abiotic stress in their hosts, and changes in these fungal communities can alter plant productivity, species interactions, community structure and ecosystem processes. We investigated the response of root‐associated fungi to experimental drought (66% reduction in growing season precipitation) across six North American grassland ecosystem types to determine how extreme drought alters root‐associated fungi, and understand what abiotic factors influence root fungal community composition across grassland ecosystems. Next generation sequencing of the fungal ITS2 region demonstrated that drought primarily re‐ordered fungal species' relative abundances within host plant species, with different fungal responses depending on host identity. Grass species that declined more under drought trended toward less community re‐ordering of root fungi than species less sensitive to drought. Host identity and grassland ecosystem type defined the magnitude of drought effects on community composition, diversity and root colonization, and the most important factor affecting fungal composition was plant species identity. Fungal diversity was less responsive to drought than fungal composition. Across ecosystems, latitude and soil pH were better predictors of fungal diversity than experimental drought. Drought significantly reduced fungal diversity and evenness only in sideoats grama Bouteloua curtipendula and reduced root colonization only in blue grama B. gracilis. Our results illustrate that predicting the effects of drought on root‐associated fungi will require attention to host plant identity and ecosystem type. By comparing our findings against soil microbe responses in the same experiment, we propose the hypothesis that fungi in plant roots are less sensitive to drought than fungi inhabiting soils. Our study highlights the importance of studying community‐level re‐ordering of fungal composition for understanding plant responses to climate change.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental drought re‐ordered assemblages of root‐associated fungi across North American grasslands

et al. 2020

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Endophytic Beauveria bassiana promotes drought tolerance and early flowering in corn

Kuzhuppillymyal-Prabhakarankutty

Tamez‐Guerra

Gómez-Flores

et al. 2020

World J Microbiol Biotechnol

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Endophytic Fusarium proliferatum Reprogrammed Phytohormone Production and Antioxidant System of Oryza sativa under Drought Stress

et al. 2023

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The aim of the current study was to isolate endophytes from the roots of Rhazya stricta and assess their potential to improve the growth of drought-stressed sunflower seedlings. The potential role of the isolated endophytic fungus was initially screened by using two rice varieties (mutant rice cultivar Waito-C: Gibberellins deficient; and Dongji byeo: Gibberellins-producing normal cultivar). A significant (p < 0.05) increase in various growth attributes of both rice varieties associated with one of the isolates i.e., N4 was noticed. Furthermore, the N4 isolate was tested for its role in improving the agronomic attributes of sunflowers under drought stress. The symbiotic association significantly (p < 0.05) improved the host growth and protection from PEG-induced drought stress. The drought mitigation in N4-associated sunflower seedlings can be linked with the regulation of phytohormones, stress-related metabolites, low-molecular-weight proteins and sugars, and scavenging of reactive oxygen species (ROS). Microscopic analysis revealed that the potent endophytic fungal strain consisted of thin and hyaline hyphae, forming dense olive-green mycelia (4–5 cm in dm) with black flask-shaped fruiting bodies. Based on the ITS sequence homology and phylogeny, the strain was identified as Fusarium proliferatum (MG251448). The results of this study concluded that this phytohormone-secreting endophyte can improve crop productivity in dry areas where drought stress is the main challenge faced by crops.

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Inoculation of Sunflower with Endophytic Fungi Alters Soil Physio-Chemical Properties to Nullify Drought Stress

Cited by 3 publications

References 0 publications

Experimental drought re‐ordered assemblages of root‐associated fungi across North American grasslands

Experimental drought re‐ordered assemblages of root‐associated fungi across North American grasslands

Endophytic Beauveria bassiana promotes drought tolerance and early flowering in corn

Endophytic Fusarium proliferatum Reprogrammed Phytohormone Production and Antioxidant System of Oryza sativa under Drought Stress

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