Fungal Endophyte Improves Survival of Lolium perenne in Low Fertility Soils by Increasing Root Growth, Metabolic Activity and Absorption of Nutrients

Chen, Zhenjiang; Jin, Yuanyuan; Xiang, Yanqiao; Chen, Taixiang; Wei, Xuekai; Li, Chunjie; White, James F.; Zhang, Nan

doi:10.1007/s11104-020-04556-7

Cited by 42 publications

(26 citation statements)

References 96 publications

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“…Our research found that the P content in E+ and E− tissues of Achnatherum inebrians reduced clearly with the decrease of P level. However, Epichloë gansuensis did not significantly affect the P content in leaves and roots at different P concentrations, which was contrary to previous studies [ 15 ]. It has been confirmed that many microorganisms play an important role in enhancing the P absorption of the host at P deficiency conditions [ 29 ].…”

Section: Discussioncontrasting

confidence: 99%

“…The Epichloë endophyte exists in many cool-season grasses, including Achnatherum inebrians , Festuca arundinacea , Hordeum brevisubulatum , and Lolium perenne [ 11 , 12 , 15 , 23 ]. The relationship between Epichloë endophyte and host grasses is mutually beneficial as has been confirmed by previous studies [ 24 ].…”

Section: Discussionmentioning

confidence: 99%

“…P deficiency stress can interfere with the absorption of other nutrients [ 15 ]. We found that the N content of leaves and roots of Achnatherum inebrians at 0.01 mM P level were increased compared with 0.5 mM P. One study reported that P deficiency can affect the activity of nitrate reductase (NR) in Rosa roxburghii , resulting in the decrease of N content [ 31 ].…”

Section: Discussionmentioning

confidence: 99%

“…One study have shown that endophyte infection affects the distribution of photosynthetic products in roots and improves the ability of nutrient removal, therefore, increasing the resistance of tall fescue to P deficiency [ 14 ]. Besides, recent study confirm that Epichloë endophyte plays an important role in promoting Lolium perenne growth in low fertility soil by increasing root growth, metabolic activity, biomass, and changing nutrients [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

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Epichloë gansuensis Increases the Tolerance of Achnatherum inebrians to Low-P Stress by Modulating Amino Acids Metabolism and Phosphorus Utilization Efficiency

Liu

Hou

Jin

et al. 2021

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In the long-term evolutionary process, Achnatherum inebrians and seed-borne endophytic fungi, Epichloë gansuensis, formed a mutually beneficial symbiosis relationship, and Epichloë gansuensis has an important biological role in improving the tolerance of host grasses to abiotic stress. In this work, we first assessed the effects of Epichloë gansuensis on dry weight, the content of C, N, P and metal ions, and metabolic pathway of amino acids, and phosphorus utilization efficiency (PUE) of Achnatherum inebrians at low P stress. Our results showed that the dry weights, the content of alanine, arginine, aspartic acid, glycine, glutamine, glutamic acid, L-asparagine, lysine, phenylalanine, proline, serine, threonine, and tryptophan were higher in leaves of Epichloë gansuensis-infected (E+) Achnatherum inebrians than Epichloë gansuensis-uninfected (E−) Achnatherum inebrians at low P stress. Further, Epichloë gansuensis increased C content of roots compared to the root of E− plant at 0.01 mM P and 0.5 mM P; Epichloë gansuensis increased K content of leaves compared to the leaf of E− plant at 0.01 mM P and 0.5 mM P. Epichloë gansuensis reduced Ca content of roots compared to the root of E− plant at 0.01 mM P and 0.5 mM P; Epichloë gansuensis reduced the content of Mg and Fe in leaves compared to the leaf of E− plant at 0.01 mM P and 0.5 mM P. In addition, at low P stress, Epichloë gansuensis most probably influenced aspartate and glutamate metabolism; valine, leucine, and isoleucine biosynthesis in leaves; and arginine and proline metabolism; alanine, aspartate, and glutamate metabolism in roots. Epichloë gansuensis also affected the content of organic acid and stress-related metabolites at low P stress. In conclusion, Epichloë gansuensis improves Achnatherum inebrians growth at low P stress by regulating the metabolic pathway of amino acids, amino acids content, organic acid content, and increasing PUE.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Epichloë gansuensis Increases the Tolerance of Achnatherum inebrians to Low-P Stress by Modulating Amino Acids Metabolism and Phosphorus Utilization Efficiency

Liu

Hou

Jin

et al. 2021

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“…Most of the research on endophyte-mediated nutrient acquisition are from either root or seed endophytes, reports of foliar endophyte roles in nutrient acquisition are scarce. In a study of growth and nutrient acquisition of Lolium perenne containing an Epichloë endophyte in leaves, Chen et al (2020) found enhanced nutrient acquisition and attributed it to increased root growth and enhanced root symbiosis with rhizobacteria, a case where leaf endophytes stimulate root symbiosis with soil microbes to enhance nutrient acquisition into plants. In a recent study, Christian et al (2019) reported that colonization by foliar endophyte Colletotrichum tropicale in leaves of Theobroma cocoa significantly affected N uptake and distribution.…”

Section: Accepted Articlementioning

confidence: 99%

Endophyte roles in nutrient acquisition, root system architecture development and oxidative stress tolerance

et al. 2021

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Plants associate with communities of microbes (bacteria and fungi) that play critical roles in plant development, nutrient acquisition, and oxidative stress tolerance. The major share of plant microbiota is endophytes which inhabit plant tissues and help them in various capacities. In this article, we have reviewed what is presently known with regard to how endophytic microbes interact with plants to modulate root development, branching, root hair formation, and their implications in overall plant development. Endophytic microbes link the interactions of plants, rhizospheric microbes, and soil to promote nutrient solubilization and further vectoring these nutrients to the plant roots making the soil-plant-microbe continuum. Further, plant roots internalize microbes and oxidatively extract nutrients from microbes in the rhizophagy cycle. The oxidative interactions between endophytes and plants result in the acquisition of nutrients by Accepted ArticleThis article is protected by copyright. All rights reserved plants and are also instrumental in oxidative stress tolerance of plants. It is evident that plants actively cultivate microbes internally, on surfaces and in soils to acquire nutrients, modulate development and improve health. Understanding this continuum could be of greater significance in connecting endophytes with the hidden half of the plant that can also be harnessed in applied terms to enhance nutrient acquisition through the development of favorable root system architecture for sustainable production under stress conditions.

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Effects of Achnatherum inebrians ecotypes and endophyte status on plant growth, plant nutrient, soil fertility and soil microbial community

Jin

Chen

et al. 2022

Soil Science Soc of Amer J

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Effects of endophytes infection on bacterial and fungal communities in soil have been extensively studied. However, how the presence of Epichloë endophytes and environmental factors influence the nitrifying genes abundance of ammonia-oxidizing archaea (amoA-AOA) and bacteria (amoA-AOB), and denitrifying genes abundances of N reduction (nirS and nirK) and nitrous oxide reduction (nosZ) in soil is unclear. In the study, the copy number of 16S rRNA, 18S rRNA, amoA-AOB, amoA-AOA, nirS, nirK, and nosZ genes in rhizosphere soils of drunken horse grass [Achnatherum inebrians (Hance) Keng] with the infected (E+) and uninfected (E-)endophyte five ecotypes after 3 yr field cultivation were investigated using quantitative polymerase chain reaction (PCR). The effects of A. inebrians in geographic source on plant growth, soil fertility, and microbial community was greater than in different endophyte status. The copy number of the 16S rRNA, amoA-AOA, nirK, and nosZ genes from different ecotypes (Qinghai, QH; and Tianzhu, TZ) were significantly affected by Epichloë endophyte. The copy number of the 16S rRNA, 18S rRNA, amoA-AOB. amoA-AOA, nirS, nirK, and nosZ genes positively related to soil pH, moisture, C/N ratio, and soil ammonium nitrogen (NH 4 + ), and soil organic carbon (SOC) contents.Endophyte infection significantly increased plant biomass of A. inebrians from QH ecotype. Plant total chlorophyll and soil nitrate nitrogen (NO 3 -) were the main factor for the Epichloë endophyte and ecotype to affect plant dry weight. Further studies are required to confirm the regulation of soil NO 3 as an important factor in Epichloë endophyte affecting plant growth and the soil microbial community structure in relation to N cycling.

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Fungal Endophyte Improves Survival of Lolium perenne in Low Fertility Soils by Increasing Root Growth, Metabolic Activity and Absorption of Nutrients

Cited by 42 publications

References 96 publications

Epichloë gansuensis Increases the Tolerance of Achnatherum inebrians to Low-P Stress by Modulating Amino Acids Metabolism and Phosphorus Utilization Efficiency

Epichloë gansuensis Increases the Tolerance of Achnatherum inebrians to Low-P Stress by Modulating Amino Acids Metabolism and Phosphorus Utilization Efficiency

Endophyte roles in nutrient acquisition, root system architecture development and oxidative stress tolerance

Effects of Achnatherum inebrians ecotypes and endophyte status on plant growth, plant nutrient, soil fertility and soil microbial community

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