The root endophytic fungus Curvularia geniculata from Parthenium hysterophorus roots improves plant growth through phosphate solubilization and phytohormone production

Priyadharsini, Perumalsamy; Muthukumar, Thangavelu

doi:10.1016/j.funeco.2017.02.007

Cited by 116 publications

(59 citation statements)

References 38 publications

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“…Phytohormones, comprising auxins, like indole-3-acetic acid, gibberellins, ethylene, abscisic acid, brassinosteroids and cytokinins, regulate plant development by affecting many physiological and biochemical processes in plants (Fahad et al 2015). Beneficial bacteria and fungi can produce phytohormones promoting plant growth and development and inducing tolerance against environmental stresses (Fahad et al 2015;Priyadharsini & Muthukumar 2017). However, also pathogenic bacteria and fungi can produce phytohormones, thus interfering with plant growth, organ development, immune responses and hormonal signalling (Boivin et al 2016;Venturi & Keel 2016).…”

Section: Phytohormonesmentioning

confidence: 99%

Harnessing plant-bacteria-fungi interactions to improve plant growth and degradation of organic pollutants

Jambon

Thijs

Weyens

et al. 2018

Journal of Plant Interactions

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Exploiting the potential of bacteria in phytoremediation for the removal of organic and inorganic pollutants from soils and (ground)water holds great promise. Besides bacteria, mycorrhizal fungi and free-living saprotrophs are well known for their strong degradative capacities and plant growth promotion effects, which makes them of high interest for use in different bioremediation strategies. To further increase the efficiency and successes of phytoremediation, interactions between plants and their associated microorganisms, both bacteria and fungi, should be further investigated, in addition to the close interactions between bacteria and fungi. Benefitting from an increased understanding of microbial community structure and assembly allows us to better understand how the holobiont can be modified to improve pollutant degradation and plant growth. In this review, we present an overview of insights in plant-bacteria-fungi interactions and the opportunities of exploiting these tripartite interactions to enhance the effectiveness of phytoremediation of organic pollutants.

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Section: Phytohormonesmentioning

confidence: 99%

Harnessing plant-bacteria-fungi interactions to improve plant growth and degradation of organic pollutants

Jambon

Thijs

Weyens

et al. 2018

Journal of Plant Interactions

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“…The capacity to solubilize P, though, has been shown in others DSE species, using solid and liquid media with three phosphorus sources: calcium, aluminum and iron phosphate (Priyadharsini & Muthukumar, 2017;Spagnoletti et al, 2017). For instance, Aspergillus ustus, considered as a DSE fungi (Barrow & Osuna, 2002), and Curvularia geniculata (Priyadharsini & Muthukumar, 2017) promote plant growth due to their ability to solubilize P from unavailable phosphate. Further research is needed on this aspect of strain 22-1, using more sensitive methods and different sources of phosphorus.…”

Section: Physiological Characterizationmentioning

confidence: 99%

“…Curvularia spp, Phoma spp.) could be included within this group, as they colonize the root parenchymal tissue with melanized mycelium, behaving as typical DSE fungi (Loro et al, 2012;Priyadharsini & Muthukumar, 2017).…”

Section: Introductionmentioning

confidence: 99%

Xylariales): Physiological characterization and structural features of its association with wheat.

Rothen¹,

Miranda²,

Fracchia³

et al. 2018

Bol. Soc. Argent. Bot.

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Summary: Plant roots can be colonized by asymptomatic fungal strains belonging to several taxa, among them, the group defined as Dark Septate Endophytes (DSE). Microdochium bolleyi commonly colonizes wheat roots and other crops. It is considered a weak pathogen or even a non-pathogenic fungal species, which has also been considered as a potential biocontrol agent against aggressive soil-borne pathogens in cereal crops. We isolated a strain of M. bolleyi from wheat roots sampled in a crop field in Argentina, and characterized its abilities to grow in different carbon and nitrogen sources, to produce indole and to solubilize phosphorus; also several enzymatic activities were evaluated. In addition, resynthesis was performed under controlled conditions in order to characterize root fungal colonization under both, optical and transmission microscopy. The strain 22-1 colonized wheat root parenchymal tissue, forming chlamysdospores inside parenchymal cells and root hairs, and poorly grew in carbon and nitrogen sources. This fungus also synthesized indoles in in vitro culture, but it cannot solubilize phosphorus. Only amylase activity was detected out of seven enzymatic activity measured. Microdochium bolleyi (strain 22-1) colonized the roots, it formed typical DSE fungal structures and behaved like a "true endophyte"; however further studies are necessary to elucidate its role in the association with wheat.Key words: Dark septate endophytes, Microdochium bolleyi, root endophytes, wheat crop.Resumen: Microdochium bolleyi (Ascomycota: Xylariales): Caracterización fisiológica y caracteres estructurales de su asociación con trigo. Las raíces de las plantas hospedan una gran diversidad de hongos, entre ellos, se encuentran los Endofitos Septados Oscuros (ESO). Microdochium bolleyi coloniza las raíces de trigo y otros cereales, aunque algunos autores lo han considerado un patógeno débil, otros han demostrado su acción biocontroladora contra patógenos agresivos del suelo. En el presente trabajo, se aisló una cepa de M. bolleyi (22-1) de raíces de trigo. Esta cepa fue metabólicamente caracterizada y se realizó un ensayo de resíntesis bajo condiciones controladas con el fin de caracterizar la colonización del hongo en la raíz bajo microscopía óptica y de transmisión. Su crecimiento fue escaso en las fuentes de carbono y nitrógeno evaluadas, sintetizó indoles en cultivo in vitro, pero no mostró habilidades para solubilizar el fósforo, por último, solo se detectó actividad amilasa. La cepa 22-1 coloniza la corteza radicular del trigo, formando clamidosporas melanizadas inter e intracelularmente y en el interior de los pelos radiculares. Microdochium bolleyi (cepa 22-1) coloniza la raíz de trigo formando las típicas estructuras de los ESO y comportándose como un "verdadero endófito", sin embargo, se necesitan más estudios para terminar de dilucidar su papel en la asociación con el trigo.Palabras clave: Endofitos septados oscuros, hongos endofitos, Microdochium bolleyi, trigo.

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“…They also produce such secondary metabolites that are used in the preparation and improvement of drugs that are utilized to treat human infections [15]. The genus Curvularia belongs to a class hyphomycete found in soil that could be both pathogenic and beneficial partner for many plant species and may have a positive influence on plant's growth parameters [16]. In this study, healthy and mature plants of P. somniferum, C. fistula and C. roseus were collected from the gardens of Government College of Technology Kohat road and University of Peshawar, Peshawar, Khyber Pakhtunkhwa, Pakistan.…”

Section: Introductionmentioning

confidence: 99%

Biological screening of endophytic fungi extracted from different parts of medicinal plants

Rehman¹

2020

PAB

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Endophytic fungi reside in the internal plant tissues and are potential source of the natural products that may be used in the discovery of novel antibacterial, antifungal and antitumor agents. The recent work was conducted to isolate and identify endophytic fungi from the three medicinal plants Papaver somniferum (Opium poppy), Cassia fistula (Amaltaas) and Catharanthus roseus (Madagascar periwinkle) and to conduct antimicrobial activities of the crude extract obtained from these endophytic fungal strains. A total of four endophytic fungal strains were isolated of which two were isolated from the roots of P. somniferum, one from leaves of C. fistula and one from the mid rib of C. roseus using Sabouraud Dextrose Agar and labelled as PS3, PS4, CF1 and CR1 respectively. Three of the bioactive fungal strains were identified as Aspergillus spp. and one of genus Curvularia based on the cultural and morphological characteristics using bright field microscopy. After identification, the endophytic fungal strains were grown in Czapek yeast extract broth medium for the production of crude metabolites. Antibacterial activity of the crude isolates were tested against 4 human infectious bacterial species including two gram negative bacteria i.e. Salmonella typhi and Pseudomonas aeruginosa, and two gram positive bacteria Bacillus subtilis and Staphylococcus aureus. Different concentration of crude extract were tested i.e. 24 mg/ml, 12 mg/ml and 6 mg/ml, among them the concentration 24 mg/ml showed best antibacterial activity. The crude extract was also tested against two pathogenic fungal strains i.e. Aspergillus niger and Alternaria solani. Our results suggest that the crude extract from these endophytic fungal strains may be potential source in the discovery of novel antibacterial and antifungal drugs.

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The root endophytic fungus Curvularia geniculata from Parthenium hysterophorus roots improves plant growth through phosphate solubilization and phytohormone production

Cited by 116 publications

References 38 publications

Harnessing plant-bacteria-fungi interactions to improve plant growth and degradation of organic pollutants

Harnessing plant-bacteria-fungi interactions to improve plant growth and degradation of organic pollutants

Xylariales): Physiological characterization and structural features of its association with wheat.

Biological screening of endophytic fungi extracted from different parts of medicinal plants

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