Endophytes as Plant Nutrient Uptake-Promoter in Plants

García-Latorre, Carlos; Rodrigo, Sara; Santamaría, O.

doi:10.1007/978-3-030-65447-4_11

Cited by 10 publications

(7 citation statements)

References 101 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mechanisms by which fungal endophytes induce water and nutrient uptake by plant hosts include increased production of phytohormones that increase root biomass; improved fungal colonisation of roots and hyphal interception of nutrients; enhanced secretion of hydrolytic enzymes that enhance nutrient solubilisation; increased activity of plasma membrane-associated proton-pumps, and elevated expression of phosphate transporters; and enhanced siderophore binding sites that chelate Fe 3+ ions and bind to Cu 2+ , Zn 2+ , and Mn 3+ [ 47 , 48 , 49 ]. Interestingly, a significant interactive effect of watering interval and B. bassiana inoculation on tissue Fe content was observed in this study, with the fungus-treated plants having higher Fe content at 5-day and 7-day watering intervals.…”

Section: Discussionmentioning

confidence: 99%

Interactive Effects of Water Deficiency and Endophytic Beauveria bassiana on Plant Growth, Nutrient Uptake, Secondary Metabolite Contents, and Antioxidant Activity of Allium cepa L.

Gana

Etsassala

Nchu

2022

JoF

View full text Add to dashboard Cite

The main aim of this research study was to assess the interactive effects of water deficiency and the inoculation of a growth medium with Beauveria bassiana on plant growth, nutrient uptake, secondary metabolite contents, and antioxidant capacity of Allium cepa. A. cepa seedlings were simultaneously exposed to one of three watering regime treatments (3-day, 5-day, and 7-day watering intervals) and B. bassiana or no-fungus treatment. While the longest watering interval induced reduced plant growth, plants inoculated with B. bassiana had better results than those in the no-fungus treatment. Significant interactive effects (DF = 2.0; p < 0.05) between fungus and the watering regime on P, K, and Fe contents were observed. Remarkably, at the 7-day watering interval, the polyphenol content (64.0 mg GAE/L) was significantly higher in the plants treated with B. bassiana than in the no-fungus-treated plants. The watering interval significantly affected (DF = 2, 6; F = 7.4; p < 0.05) total flavonol contents among the fungus-treated plants. The interaction of the watering interval and B. bassiana inoculation (DF = 2.0; F = 3.8; p < 0.05) significantly influenced the flavonol content in the onion bulbs and the antioxidant activities of onion bulbs in the FRAP assay (DF = 2.0; F = 4.1; p < 0.05).

show abstract

Section: Discussionmentioning

confidence: 99%

Interactive Effects of Water Deficiency and Endophytic Beauveria bassiana on Plant Growth, Nutrient Uptake, Secondary Metabolite Contents, and Antioxidant Activity of Allium cepa L.

Gana

Etsassala

Nchu

2022

JoF

View full text Add to dashboard Cite

show abstract

“…Endophytic bacteria support the plant growth by: (i) solubilizing mineral nutrients such as phosphorous (P), potassium (K), and zinc (Zn) [ 5 ]; (ii) synthesizing plant hormones such as indole-3-acetic acid (IAA) [ 6 ]; (iii) producing ammonia (NH 3 ) and hydrogen cyanide (HCN) [ 7 ], iron (Fe)-chelating compounds (e.g., siderophores) [ 8 ], and anti-microbial substances [ 9 ]; and (vi) releasing extracellular enzymes.…”

Section: Introductionmentioning

confidence: 99%

Stress-Tolerant Endophytic Isolate Priestia aryabhattai BPR-9 Modulates Physio-Biochemical Mechanisms in Wheat (Triticum aestivum L.) for Enhanced Salt Tolerance

Shahid

Zeyad

Syed

et al. 2022

IJERPH

View full text Add to dashboard Cite

In efforts to improve plant productivity and enhance defense mechanisms against biotic and abiotic stresses, endophytic bacteria have been used as an alternative to chemical fertilizers and pesticides. In the current study, 25 endophytic microbes recovered from plant organs of Triticum aestivum L. (wheat) were assessed for biotic (phyto-fungal pathogens) and abiotic (salinity, drought, and heavy metal) stress tolerance. Among the recovered isolates, BPR-9 tolerated maximum salinity (18% NaCl), drought (15% PEG-6000), and heavy metals (µg mL−1): Cd (1200), Cr (1000), Cu (1000), Pb (800), and Hg (30). Based on phenotypic and biochemical characteristics, as well as 16S rDNA gene sequencing, endophytic isolate BPR-9 was recognized as Priestia aryabhattai (accession no. OM743254.1). This isolate was revealed as a powerful multi-stress-tolerant crop growth promoter after extensive in-vitro testing for plant growth-promoting attributes, nutrient (phosphate, P; potassium, K; and zinc, Zn) solubilization efficiency, extracellular enzyme (protease, cellulase, amylase, lipase, and pectinase) synthesis, and potential for antagonistic activity against important fungal pathogens viz. Alternaria solani, Rhizoctonia solani, Fusarium oxysporum, and Ustilaginoidea virens. At elevated salt levels, increases were noted in indole-3-acetic acid; siderophores; P, K, and Zn-solubilization; ACC deaminase; and ammonia synthesized by Priestia aryabhattai. Additionally, under in-vitro plant bioassays, wheat seedlings inoculated with P. aryabhattai experienced superior growth compared to non-inoculated seedlings in high salinity (0–15% NaCl) environment. Under NaCl stress, germination rate, plant length, vigor indices, and leaf pigments of wheat seedlings significantly increased following P. aryabhattai inoculation. Furthermore, at 2%-NaCl, B. aryabhattai greatly and significantly (p ≤ 0.05) decreased relative leaf water content, membrane damage, and electrolyte leakage compared with the non-inoculated control. Catalase, superoxide dismutase, and peroxidase activity increased by 29, 32, and 21%, respectively, in wheat seedlings exposed to 2% NaCl and inoculated with the bacteria. The present findings demonstrate that endophytic P. aryabhattai strains might be used in the future as a multi-stress reducer and crop growth promoter in agronomically important crops including cereals.

show abstract

“…This benefit from fungal endophytes takes more relevance in Brassicaceae plants, which cannot establish functional mycorrhizal symbiotic associations (Cosme et al, 2018;Hiruma et al, 2018;Sarkar et al, 2021). Fungal endophytes can increase the plant content of all macronutrients and many micronutrients (Behie and Bidochka, 2014;García-Latorre et al, 2021). The mechanisms are not clear in most cases, but they can broadly be divided into three groups: (i) the increasing availability of soil nutrients (such as metabolization of macromolecules, mineralization and solubilization of organic or insoluble forms, or chelation of cations that can therefore be better assimilated by the plant), (ii) the transfer of nutrients from the soil to the root, acting as root extensions that transport nutrients to the plant, and (iii) the induction of changes in the plant, such as the promotion of root growth and development, which increases its absorption ability, or promoting the activity of plant enzymes or transporters (Behie and Bidochka, 2014;García-Latorre et al, 2021;Sarkar et al, 2021).…”

Section: Plant Growth Promotion and Increase In Yield And Qualitymentioning

confidence: 99%

Fungal endophytes of Brassicaceae: Molecular interactions and crop benefits

et al. 2022

View full text Add to dashboard Cite

Brassicaceae family includes an important group of plants of great scientific interest, e.g., the model plant Arabidopsis thaliana, and of economic interest, such as crops of the genus Brassica (Brassica oleracea, Brassica napus, Brassica rapa, etc.). This group of plants is characterized by the synthesis and accumulation in their tissues of secondary metabolites called glucosinolates (GSLs), sulfur-containing compounds mainly involved in plant defense against pathogens and pests. Brassicaceae plants are among the 30% of plant species that cannot establish optimal associations with mycorrhizal hosts (together with other plant families such as Proteaceae, Chenopodiaceae, and Caryophyllaceae), and GSLs could be involved in this evolutionary process of non-interaction. However, this group of plants can establish beneficial interactions with endophytic fungi, which requires a reduction of defensive responses by the host plant and/or an evasion, tolerance, or suppression of plant defenses by the fungus. Although much remains to be known about the mechanisms involved in the Brassicaceae-endophyte fungal interaction, several cases have been described, in which the fungi need to interfere with the GSL synthesis and hydrolysis in the host plant, or even directly degrade GSLs before they are hydrolyzed to antifungal isothiocyanates. Once the Brassicaceae-endophyte fungus symbiosis is formed, the host plant can obtain important benefits from an agricultural point of view, such as plant growth promotion and increase in yield and quality, increased tolerance to abiotic stresses, and direct and indirect control of plant pests and diseases. This review compiles the studies on the interaction between endophytic fungi and Brassicaceae plants, discussing the mechanisms involved in the success of the symbiosis, together with the benefits obtained by these plants. Due to their unique characteristics, the family Brassicaceae can be seen as a fruitful source of novel beneficial endophytes with applications to crops, as well as to generate new models of study that allow us to better understand the interactions of these amazing fungi with plants.

show abstract

Endophytes as Plant Nutrient Uptake-Promoter in Plants

Cited by 10 publications

References 101 publications

Interactive Effects of Water Deficiency and Endophytic Beauveria bassiana on Plant Growth, Nutrient Uptake, Secondary Metabolite Contents, and Antioxidant Activity of Allium cepa L.

Interactive Effects of Water Deficiency and Endophytic Beauveria bassiana on Plant Growth, Nutrient Uptake, Secondary Metabolite Contents, and Antioxidant Activity of Allium cepa L.

Stress-Tolerant Endophytic Isolate Priestia aryabhattai BPR-9 Modulates Physio-Biochemical Mechanisms in Wheat (Triticum aestivum L.) for Enhanced Salt Tolerance

Fungal endophytes of Brassicaceae: Molecular interactions and crop benefits

Contact Info

Product

Resources

About