Endophytic fungus Beauveria bassiana can enhance drought tolerance in red oak seedlings

Ferus, Peter; Barta, Marek; Konôpková, Jana

doi:10.1007/s00468-019-01854-1

Cited by 28 publications

(16 citation statements)

References 35 publications

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“…However, drought-tolerant plants can reduce chlorophyll degradation, MDA accumulation, and water loss compared with drought-sensitive plants. Plants inoculated with certain endophytes can maintain higher water and chlorophyll contents and lower MDA levels than noninoculated plants under drought stress, suggesting that these microbes can enhance plant drought resistance 16 , 17 , 22 , 23 , 28 – 30 . Similar to the above reports, P. tabulaeformis seedlings treated with PTD37 accumulated less MDA, broke down less chlorophyll, and lost less tissue water than the plants in other treatments.…”

Section: Discussionmentioning

confidence: 99%

“…Our study showed that the seedlings in the PTD37 treatment had a higher proline content than those in the other treatments. Some researchers have shown that plants inoculated with endophytes can produce less proline than noninoculated plants under drought conditions 16 , 23 . However, more researchers have demonstrated that inoculated plants have higher levels of proline than noninoculated plants under drought conditions 23 , 24 , 28 , 29 , 46 .…”

Section: Discussionmentioning

confidence: 99%

“…Under drought conditions, hybrid poplars inoculated with endophytic communities increased their antioxidant activities to achieve higher drought resistance than uninoculated plants 21 . Endophytic fungi improved the gas exchange, chlorophyll content, photosynthesis, and chloroplast fluorescence in both red oak and Sorghum bicolor seedlings to respond to drought stress 16 , 17 , 22 , 23 . Increased metabolism of amino acids, proteins, and other secondary substances has also been related to drought-resistance responses in some inoculated plants 22 , 24 .…”

Section: Introductionmentioning

confidence: 99%

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A strain of Phoma species improves drought tolerance of Pinus tabulaeformis

Zhou

Dai

et al. 2021

Sci Rep

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Global warming has led to frequent droughts, posing challenges for afforestation in arid and semiarid regions. In search of labor-saving and money-saving methods to improve the survival and growth rates of trees in these regions, we isolated and identified fungal endophytes that can potentially enhance the drought-resistance abilities of seedlings. We isolated 93 endophytic strains from the roots of Pinus tabulaeformis trees grown on an arid cliff. Three isolates increased the drought resistance of the tree seedlings. Using morphological, molecular, and physiological-biochemical methods, we identified three isolates as different clones of a strain of Phoma spp. and studied the strain’s effect on stress resistance-related substances in the seedlings. The results showed that the strain improved drought tolerance and increased the seedlings’ proline levels and antioxidant enzyme activities. The strain also secreted abundant extracellular abscisic acid, which likely triggered the seedlings’ protective mechanisms. This endophytic strain may provide a cheaper labor-saving, sustainable alternative to traditional methods of enhancing drought resistance.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A strain of Phoma species improves drought tolerance of Pinus tabulaeformis

Zhou

Dai

et al. 2021

Sci Rep

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“…Foliar endophytic fungi (FEF) reside within leaf tissue and exhibit beneficial effects on the host plant. In trees, FEF can trigger effects on leaf productivity [7], plant growth [8], draught tolerance [9], resistance against pathogens and pests [8, [10][11][12][13] and, furthermore, Life 2021, 11, 1081 2 of 11 moderate the nutrient cycle via the quality and decomposition rates of leaf litter [8,14]. In summary, FEF could play a significant role in shaping the observed positive effects of tree diversity on the functioning of a forest ecosystem [15] and might provide a mechanism to alleviate climate-change related stressors.…”

Section: Introductionmentioning

confidence: 99%

Foliar Fungal Endophytes in a Tree Diversity Experiment Are Driven by the Identity but Not the Diversity of Tree Species

Kambach

Sadlowski

Peršoh

et al. 2021

Life

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Symbiotic foliar fungal endophytes can have beneficial effects on host trees and might alleviate climate-induced stressors. Whether and how the community of foliar endophytes is dependent on the tree neighborhood is still under debate with contradicting results from different tree diversity experiments. Here, we present our finding regarding the effect of the tree neighborhood from the temperate, densely planted and 12-years-old Kreinitz tree diversity experiment. We used linear models, redundancy analysis, Procrustes analysis and Holm-corrected multiple t-tests to quantify the effects of the plot-level tree neighborhood on the diversity and composition of foliar fungal endophytes in Fagus sylvatica, Quercus petraea and Picea abies. Against our expectations, we did not find an effect of tree diversity on endophyte diversity. Endophyte composition, however, was driven by the identity of the host species. Thirteen endophytes where overabundant in tree species mixtures, which might indicate frequent spillover or positive interactions between foliar endophytes. The independence of the diversity of endophytes from the diversity of tree species might be attributed to the small plot size and the high density of tree individuals. However, the mechanistic causes for these cryptic relationships still remain to be uncovered.

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“…While genetic improvement of trees is a valuable strategy for plantation forestry, it is less feasible to natural forests, and it is also a long-term project which needs initial investment in research. Thus, the options of biological control of pests and pathogens (Hurley et al, 2012;Martín-García et al, 2019) and the use of microorganisms such as mycorrhiza and endophytes to alleviate abiotic stress tolerance (Liu et al, 2015;Khan et al, 2016;Ferus et al, 2019) should be explored. However, these biological agents have been used against single stresses under optimum environmental conditions (Slippers et al, 2012), and thus, may not function under multiple stress settings.…”

Section: Mitigation Strategiesmentioning

confidence: 99%

The Threat of the Combined Effect of Biotic and Abiotic Stress Factors in Forestry Under a Changing Climate

2020

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Plants encounter several biotic and abiotic stresses, usually in combination. This results in major economic losses in agriculture and forestry every year. Climate change aggravates the adverse effects of combined stresses and increases such losses. Trees suffer even more from the recurrence of biotic and abiotic stress combinations owing to their long lifecycle. Despite the effort to study the damage from individual stress factors, less attention has been given to the effect of the complex interactions between multiple biotic and abiotic stresses. In this review, we assess the importance, impact, and mitigation strategies of climate change driven interactions between biotic and abiotic stresses in forestry. The ecological and economic importance of biotic and abiotic stresses under different combinations is highlighted by their contribution to the decline of the global forest area through their direct and indirect roles in forest loss and to the decline of biodiversity resulting from local extinction of endangered species of trees, emission of biogenic volatile organic compounds, and reduction in the productivity and quality of forest products and services. The abiotic stress factors such as high temperature and drought increase forest disease and insect pest outbreaks, decrease the growth of trees, and cause tree mortality. Reports of massive tree mortality events caused by “hotter droughts” are increasing all over the world, affecting several genera of trees including some of the most important genera in plantation forests, such as Pine, Poplar, and Eucalyptus. While the biotic stress factors such as insect pests, pathogens, and parasitic plants have been reported to be associated with many of these mortality events, a considerable number of the reports have not taken into account the contribution of such biotic factors. The available mitigation strategies also tend to undermine the interactive effect under combined stresses. Thus, this discussion centers on mitigation strategies based on research and innovation, which build on models previously used to curb individual stresses.

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Endophytic fungus Beauveria bassiana can enhance drought tolerance in red oak seedlings

Cited by 28 publications

References 35 publications

A strain of Phoma species improves drought tolerance of Pinus tabulaeformis

A strain of Phoma species improves drought tolerance of Pinus tabulaeformis

Foliar Fungal Endophytes in a Tree Diversity Experiment Are Driven by the Identity but Not the Diversity of Tree Species

The Threat of the Combined Effect of Biotic and Abiotic Stress Factors in Forestry Under a Changing Climate

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