scholarly journals Fungal Endophytes of Vitis vinifera—Plant Growth Promotion Factors

Agriculture ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1250
Author(s):  
Markéta Kulišová ◽  
Maria Vrublevskaya ◽  
Petra Lovecká ◽  
Blanka Vrchotová ◽  
Milena Stránská ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Endophytic Fungi ◽  
Growth Promotion ◽  
Fungal Endophytes ◽  
Plant Tissues ◽  
Antifungal Compounds ◽  
Microscopic Fungi ◽  
Isolation And Identification ◽  
Wide Range ◽  
Promising Source

Endophytes are microorganisms that live asymptomatically inside plant tissues. They are beneficial to their host in many aspects, especially as a defense against foreign phytopathogens through the production of a variety of metabolites. These substances can serve as sources of new natural products for medicinal, agricultural, and industrial purposes. This article is focused on endophytic fungi from Vitis vinifera. The purpose of the research was their isolation and identification during the Vitis vinifera growing season. Subsequently, the isolates were tested for the production of biotechnologically interesting metabolites (siderophores, antioxidants, and antifungal compounds). In total, 24 endophytic fungi were isolated, the most represented genus was Cladosporium sp. The results of the test for antioxidant and antifungal properties, as well as siderophore production, have shown that the population of Vitis vinifera endophytic microscopic fungi could serve as a promising source of metabolites with a wide range of applications.

scholarly journals Screening Fungal Endophytes Derived from Under-Explored Egyptian Marine Habitats for Antimicrobial and Antioxidant Properties in Factionalised Textiles

2020 ◽  
Vol 8 (10) ◽  
pp. 1617
Author(s):  
Ahmed A. Hamed ◽  
Sylvia Soldatou ◽  
M. Mallique Qader ◽  
Subha Arjunan ◽  
Kevin Jace Miranda ◽  
...  
Keyword(s):  
Endophytic Fungi ◽  
Pathogenic Bacteria ◽  
Antioxidant Activities ◽  
Human Fibroblasts ◽  
Fungal Endophytes ◽  
Antioxidant Properties ◽  
Chemical Screening ◽  
Marine Habitats ◽  
Bacteria And Fungi ◽  
Promising Source

Marine endophytic fungi from under-explored locations are a promising source for the discovery of new bioactivities. Different endophytic fungi were isolated from plants and marine organisms collected from Wadi El-Natrun saline lakes and the Red Sea near Hurghada, Egypt. The isolated strains were grown on three different media, and their ethyl acetate crude extracts were evaluated for their antimicrobial activity against a panel of pathogenic bacteria and fungi as well as their antioxidant properties. Results showed that most of the 32 fungal isolates initially obtained possessed antimicrobial and antioxidant activities. The most potent antimicrobial extracts were applied to three different cellulose containing fabrics to add new multifunctional properties such as ultraviolet protection and antimicrobial functionality. For textile safety, the toxicity profile of the selected fungal extract was evaluated on human fibroblasts. The 21 strains displaying bioactivity were identified on molecular basis and selected for chemical screening and dereplication, which was carried out by analysis of the MS/MS data using the Global Natural Products Social Molecular Networking (GNPS) platform. The obtained molecular network revealed molecular families of compounds commonly produced by fungal strains, and in combination with manual dereplication, further previously reported metabolites were identified as well as potentially new derivatives.

scholarly journals Antimicrobial Activity of Endophytic Fungi Isolated from Eryngium foetidum, an Ethnomedicinal Plant of Assam

2019 ◽  
Vol 11 (06) ◽  
Author(s):  
Rajreepa Talukdar ◽  
Kumananda Tayung
Keyword(s):  
Antimicrobial Activity ◽  
Endophytic Fungi ◽  
Wide Spectrum ◽  
Fungal Endophytes ◽  
Antimicrobial Properties ◽  
Malt Extract ◽  
Alternative Source ◽  
Wide Range ◽  
Test Organisms ◽  
Leaf Tissues

Eyngium foetidum L. is a medicinal plant widely used by ethnic tribal communities of Assam as an alternative source of medicine for the treatment of various diseases. The present investigation was undertaken with an aim to isolate, identify and assess the antimicrobial activity of endophytic fungi associated with the healthy leaf tissues of E. foetidum. The endophytic fungi were isolated three different media, namely, Potato Dextrose Agar (PDA), Malt Extract Agar (MEA) and Water Agar (WA) media and from three different sites. Altogether, 84 endophytic fungal isolates were isolated from 150 segments of leaf tissues. Dominant endophytes were found to be fungi belonging to the genus Colletotrichum, followed by non-sporulating members grouped under mycelia sterilia. Other fungal genera that were isolated as endophytes were Scopulariopsis, Cladosporium, Stemphylium, Penicilllium and Alternaria. The endophytic fungi thus isolated were studied for antimicrobial activity against some clinically significant human pathogenic test organisms. Ethyl acetate extracts of all endophytes exhibited antimicrobial activity by inhibiting at least one out of all the test pathogens. Amongst the isolated fungi, extracts obtained from three endophytes showed wide-spectrum activity against all the test organisms. The fungal endophytes were identified as Scopulariopsis sp., Penicillium sp. and a sterile isolate morphotype strain EF6. The study indicated that E. foetidum harbours a wide range of endophytes with antimicrobial properties and further detailed investigation of the compound present in them would lead to their potential therapeutic applications as a new source of medicine.

scholarly journals Identification of cholesterol-assimilating actinomycetes strain and application of statistical modeling approaches for improvement of cholesterol oxidase production by Streptomyces anulatus strain NEAE-94

2020 ◽  
Author(s):  
Noura El-Ahmady El-Naggar ◽  
Nancy M. El-Shweihy
Keyword(s):  
Yeast Extract ◽  
Cholesterol Oxidase ◽  
Agitation Speed ◽  
Isolation And Identification ◽  
Box Behnken Design ◽  
Positive Effects ◽  
Wide Range ◽  
Burman Design ◽  
Promising Source ◽  
Plackett Burman Design

Abstract Background: Cholesterol oxidase biosensors have been used to determine the level of cholesterol in different serum and food samples. Due to a wide range of industrial and clinical applications of microbial cholesterol oxidase, isolation and identification of a new microbial source (s) of cholesterol oxidase are very important. Results: The local isolate Streptomyces sp. strain NEAE-94 is a promising source of cholesterol oxidase. It was identified based on cultural, morphological and physiological characteristics; in addition to the 16S rRNA sequence. The sequencing product had been deposited in the GenBank database under the accession number KC354803. Cholesterol oxidase production by Streptomyces anulatus strain NEAE-94 in shake flasks was optimized using surface response methodology. The different process parameters were first screened using a Plackett-Burman design and the parameters with significant effects on the production of cholesterol oxidase were identified. Out of the fifteen factors screened, agitation speed, cholesterol and yeast extract concentrations had the most significant positive effects on the production of cholesterol oxidase. The optimal levels of these variables and the effects of their mutual interactions on cholesterol oxidase production were determined using Box-Behnken design. Cholesterol oxidase production by Streptomyces anulatus strain NEAE-94 was 11.03, 27.31 U/mL after Plackett-Burman Design and Box-Behnken design; respectively, with a fold of increase of 6.06 times compared to the production before applying the Plackett-Burman design (4.51 U/mL). Conclusions: Maximum cholesterol oxidase activity is obtained at the following fermentation conditions: g/L (cholesterol 4, yeast extract 5, NaCl 0.5, K 2 HPO 4 1, FeSO 4 .7H 2 O 0.01, MgSO 4 .7H 2 O 0.5), pH 7, inoculum size 4 % (v/v), temperature 37°C, agitation speed 150 rpm, medium volume 50 mL and incubation time 5 days.

scholarly journals Arnebia euchroma, a Plant Species of Cold Desert in the Himalayas, Harbors Beneficial Cultivable Endophytes in Roots and Leaves

2021 ◽  
Vol 12 ◽  
Author(s):  
Rahul Jain ◽  
Priyanka Bhardwaj ◽  
Shiv Shanker Pandey ◽  
Sanjay Kumar
Keyword(s):  
Growth Promotion ◽  
Fungal Endophytes ◽  
Extreme Environments ◽  
Fungal Endophyte ◽  
Arid Environments ◽  
Pgp Traits ◽  
Arnebia Euchroma ◽  
Root Tissues ◽  
Promising Source

The endophytic mutualism of plants with microorganisms often leads to several benefits to its host including plant health and survival under extreme environments. Arnebia euchroma is an endangered medicinal plant that grows naturally in extreme cold and arid environments in the Himalayas. The present study was conducted to decipher the cultivable endophytic diversity associated with the leaf and root tissues of A. euchroma. A total of 60 bacteria and 33 fungi including nine yeasts were isolated and characterized at the molecular level. Among these, Proteobacteria was the most abundant bacterial phylum with the abundance of Gammaproteobacteria (76.67%) and genus Pseudomonas. Ascomycota was the most abundant phylum (72.73%) dominated by class Eurotiales (42.42%) and genus Penicillium among isolated fungal endophytes. Leaf tissues showed a higher richness (Schao1) of both bacterial and fungal communities as compared to root tissues. The abilities of endophytes to display plant growth promotion (PGP) through phosphorus (P) and potassium (K) solubilization and production of ACC deaminase (ACCD), indole acetic acid (IAA), and siderophores were also investigated under in vitro conditions. Of all the endophytes, 21.51% produced ACCD, 89.25% solubilized P, 43.01% solubilized K, 68.82% produced IAA, and 76.34% produced siderophores. Six bacteria and one fungal endophyte displayed all the five PGP traits. The study demonstrated that A. euchroma is a promising source of beneficial endophytes with multiple growth-promoting traits. These endophytes can be used for improving stress tolerance in plants under nutrient-deficient and cold/arid conditions.

scholarly journals Isolation and Mophological Identification of Endophytic Fungi from Moringa Plant (Moringa oleifera Lam.)

2019 ◽  
Vol 1 (2) ◽  
pp. 123
Author(s):  
Hasnadhiazahra Rohadi ◽  
Nuraeni Ekowati ◽  
Moh Ilyas
Keyword(s):  
Endophytic Fungi ◽  
Pure Culture ◽  
Moringa Oleifera ◽  
Fungal Endophytes ◽  
Morphological Characteristics ◽  
Plant Tissues ◽  
Morphological Identification ◽  
Mycelia Sterilia ◽  
Endophytic Microorganism ◽  
Moringa Oleifera Lam

Moringa oleifera Lam. is a small, perennial tree which belongs to moringaceae family. This plant is widely known for their nutritional and medicinal purposes. They can associate with microorganisms showing beneficial symbiosis called as endophytic microorganism. Endophytic fungi is microorganism capable of living within the plant tissues without harming their host.  This study was aimed for obtaining pure culture of fungal endophytes from M. oleifera and then identifying them based on morphological identification. The morphological identification was done by observing both macro- and micro- morphological characteristics of the endophytic fungi. Twenty endophytic fungi were isolated from lamina, petiole and stem of M. oleifera. The genus obtained were Cladosporium, Colletotrichum, Fusarium, Phomopsis, Phyllosticta, white mycelia sterilia and black mycelia sterilia (Dematiaceae). Keywords: endophytic fungi; identification; isolation; morphology; Moringa oleifera Lam.

scholarly journals Isolation and identification of L-asparaginase-producing endophytic fungi from the Asteraceae family plant species of Iran

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e8309 ◽  
Author(s):  
Sareh Hatamzadeh ◽  
Kamran Rahnama ◽  
Saeed Nasrollahnejad ◽  
Khalil Berdi Fotouhifar ◽  
Khodayar Hemmati ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Endophytic Fungi ◽  
Sequence Data ◽  
Lymphoblastic Leukemia ◽  
Phylogenetic Analyses ◽  
Large Subunit ◽  
Fungal Endophytes ◽  
Morphological Characteristics ◽  
Isolation And Identification ◽  
Alternative Source

L-asparaginase is an important anticancer enzyme that is used in the first line treatment of acute lymphoblastic leukemia. This study was conducted to isolate L-asparaginase-producing endophytic fungi from medicinal plants of family Asteraceae. Seven healthy medicinal plants from family Asteraceae were selected for the isolation of endophytic fungi using standard surface sterilization techniques. A total of 837 isolates belonging to 84 species were comprised of the stem (55.6%), leaf (31.1%), root (10.6%) and flower (2.7%). Initial screening of L-asparaginase-producing endophytes was performed by qualitative plate assay on modified Czapex dox’s agar medium. L-asparaginase activity of fungal endophytes was quantified by the nesslerization method. Identification of endophytic fungi was performed using both morphological characteristics and phylogenetic analyses of DNA sequence data including ribosomal DNA regions of ITS (Internal transcribed spacer) and LSU (partial large subunit rDNA), TEF1 (Translation Elongation Factor) and TUB (β-tubulin). Of the 84 isolates, 38 were able to produce L-asparaginase and their L-asparaginase activities were between 0.019 and 0.492 unit/mL with Fusarium proliferatum being the most potent. L-asparaginase-producing endophytes were identified as species of Plectosphaerella, Fusarium, Stemphylium, Septoria, Alternaria, Didymella, Phoma, Chaetosphaeronema, Sarocladium, Nemania, Epicoccum, Ulocladium and Cladosporium. This study showed that endophytic fungi from Asteraceae members have a high L-asparaginase-producing potential and they can be used as an alternative source for production of anticancer enzymes.

scholarly journals Fungal endophytes of high altitude ethnomedicinal plants as a bioresource of industrially imperative enzymes

2020 ◽  
Author(s):  
Neha Kapoor ◽  
Abu Mushtaque ◽  
Lokesh Gambhir
Keyword(s):  
Medicinal Plants ◽  
High Altitude ◽  
Endophytic Fungi ◽  
Fungal Endophytes ◽  
Chemical Diversity ◽  
Partial Purification ◽  
Fungal Colonization ◽  
Exogenous Enzyme ◽  
Wide Range ◽  
Ocimum Tenuiflorum

Abstract Endophytic fungi have been in the spotlight as a reservoir of novel agents with diverse bioactivities. Similarity in chemical diversity with the host plant makes them an amenable target for industrial interventions. A wide range of compounds as secondary metabolites and enzymes are manufactured inside the endophytic fungal factory. However, utilization of endophytic fungi as industrially imperative enzyme producers has been a scarce event. The present study was conducted to bio-prospect the fungal endophytes present in the high altitude medicinal plants of Uttarakhand, as industrially imperative enzyme producers. A total of 58 different endophytic isolates were obtained from Pinus sabiniana, Cinnamomum tamala, Cinnamomum verum, Ocimum tenuiflorum and Rhododendron arboreum. Endophytic fungal colonization was highest, 31%, in Pinus sabiniana. The pure isolates were further explored for the production of amylases, cellulases, proteases and L-asparaginase. Out of 58 isolates, 40 isolates exhibited potent enzyme productivity. #7PSSTB isolate was considered as superlative contender on account of its relatively higher production of all the three enzymes viz. amylases, cellulases, proteases. Partial purification of #7PSSTB extract showed compelling enzymatic activity corroborating the existence of exogenous enzyme in the extract. Interestingly, #9 RASTB, #11 RASTB and #17 RASTB exhibited the production of therapeutically imperative L-asparaginase enzyme. The present study puts the spotlight on endophytic diversity in the high altitude medicinal plants as a source of enzymes of industrial interest. Production of L-asparaginase paves the way of pharmaceutical intervention to explore anti-oncogenic effects in the endophytic fungal repository of high altitude regions.

scholarly journals Identification of cholesterol-assimilating actinomycetes strain and application of statistical modeling approaches for improvement of cholesterol oxidase production by Streptomyces anulatus strain NEAE-94

2020 ◽  
Author(s):  
Noura El-Ahmady El-Naggar ◽  
Nancy M. El-Shweihy
Keyword(s):  
Yeast Extract ◽  
Cholesterol Oxidase ◽  
Agitation Speed ◽  
Isolation And Identification ◽  
Box Behnken Design ◽  
Positive Effects ◽  
Wide Range ◽  
Burman Design ◽  
Promising Source ◽  
Plackett Burman Design

Abstract Background: Cholesterol oxidase biosensors have been used to determine the level of cholesterol in different serum and food samples. Due to a wide range of industrial and clinical applications of microbial cholesterol oxidase, isolation and identification of a new microbial source (s) of cholesterol oxidase are very important. Results: The local isolate Streptomyces sp. strain NEAE-94 is a promising source of cholesterol oxidase. It was identified based on cultural, morphological and physiological characteristics; in addition to the 16S rRNA sequence. The sequencing product had been deposited in the GenBank database under the accession number KC354803. Cholesterol oxidase production by Streptomyces anulatus strain NEAE-94 in shake flasks was optimized using surface response methodology. The different process parameters were first screened using a Plackett-Burman design and the parameters with significant effects on the production of cholesterol oxidase were identified. Out of the fifteen factors screened, agitation speed, cholesterol and yeast extract concentrations had the most significant positive effects on the production of cholesterol oxidase. The optimal levels of these variables and the effects of their mutual interactions on cholesterol oxidase production were determined using Box-Behnken design. Cholesterol oxidase production by Streptomyces anulatus strain NEAE-94 was 11.03, 27.31 U/mL after Plackett-Burman Design and Box-Behnken design; respectively, with a fold of increase of 6.06 times compared to the production before applying the Plackett-Burman design (4.51 U/mL). Conclusions: Maximum cholesterol oxidase activity is obtained at the following fermentation conditions: g/L (cholesterol 4, yeast extract 5, NaCl 0.5, K 2 HPO 4 1, FeSO 4 .7H 2 O 0.01, MgSO 4 .7H 2 O 0.5), pH 7, inoculum size 4 % (v/v), temperature 37°C, agitation speed 150 rpm, medium volume 50 mL and incubation time 5 days.

Associated microflora of medicinal ferns: biotechnological potentials and possible applications

2016 ◽  
Vol 5 (03) ◽  
pp. 4927 ◽  
Author(s):  
Shubhi Srivastava ◽  
Paul A. K.
Keyword(s):  
Secondary Metabolites ◽  
Growth Promotion ◽  
Biological Activities ◽  
Hydrolytic Enzymes ◽  
In Vitro Production ◽  
Wide Range ◽  
Negative Effect ◽  
Bacteria And Fungi

Plant associated microorganisms that colonize the upper and internal tissues of roots, stems, leaves and flowers of healthy plants without causing any visible harmful or negative effect on their host. Diversity of microbes have been extensively studied in a wide variety of vascular plants and shown to promote plant establishment, growth and development and impart resistance against pathogenic infections. Ferns and their associated microbes have also attracted the attention of the scientific communities as sources of novel bioactive secondary metabolites. The ferns and fern alleles, which are well adapted to diverse environmental conditions, produce various secondary metabolites such as flavonoids, steroids, alkaloids, phenols, triterpenoid compounds, variety of amino acids and fatty acids along with some unique metabolites as adaptive features and are traditionally used for human health and medicine. In this review attention has been focused to prepare a comprehensive account of ethnomedicinal properties of some common ferns and fern alleles. Association of bacteria and fungi in the rhizosphere, phyllosphere and endosphere of these medicinally important ferns and their interaction with the host plant has been emphasized keeping in view their possible biotechnological potentials and applications. The processes of host-microbe interaction leading to establishment and colonization of endophytes are less-well characterized in comparison to rhizospheric and phyllospheric microflora. However, the endophytes are possessing same characteristics as rhizospheric and phyllospheric to stimulate the in vivo synthesis as well as in vitro production of secondary metabolites with a wide range of biological activities such as plant growth promotion by production of phytohormones, siderophores, fixation of nitrogen, and phosphate solubilization. Synthesis of pharmaceutically important products such as anticancer compounds, antioxidants, antimicrobials, antiviral substances and hydrolytic enzymes could be some of the promising areas of research and commercial exploitation.

scholarly journals Growth Promotion or Osmotic Stress Response: How SNF1-Related Protein Kinase 2 (SnRK2) Kinases Are Activated and Manage Intracellular Signaling in Plants

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1443
Author(s):  
Yoshiaki Kamiyama ◽  
Sotaro Katagiri ◽  
Taishi Umezawa
Keyword(s):  
Protein Kinase ◽  
Plant Growth ◽  
Osmotic Stress ◽  
Protein Function ◽  
Intracellular Signaling ◽  
Growth Promotion ◽  
Research Field ◽  
Dependent Manner ◽  
Related Protein ◽  
Wide Range

Reversible phosphorylation is a major mechanism for regulating protein function and controls a wide range of cellular functions including responses to external stimuli. The plant-specific SNF1-related protein kinase 2s (SnRK2s) function as central regulators of plant growth and development, as well as tolerance to multiple abiotic stresses. Although the activity of SnRK2s is tightly regulated in a phytohormone abscisic acid (ABA)-dependent manner, recent investigations have revealed that SnRK2s can be activated by group B Raf-like protein kinases independently of ABA. Furthermore, evidence is accumulating that SnRK2s modulate plant growth through regulation of target of rapamycin (TOR) signaling. Here, we summarize recent advances in knowledge of how SnRK2s mediate plant growth and osmotic stress signaling and discuss future challenges in this research field.

Sign in / Sign up

Export Citation Format

Share Document