Production of indole-3-acetic acid by Thai native orchid-associated fungi

Chutima, Ruangwut; Lumyong, Saisamorn

doi:10.1007/s13199-012-0158-2

Cited by 28 publications

(19 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Beneficial soil microorganisms such as bacteria and fungi secrete plant growth-promoting substances including IAA, thus enhancing plant growth. IAA-producing microorganisms have been isolated from rhizosphere soils [14,21]; for example, Colletotrichum gloeosporioides, Tulasnella, and Eupenicillium were identified as IAA-producing fungal isolates [8]. In the current study, the presence of a significant quantity of IAA in the PNF2 culture medium might explain its growth enhancing effects on sesame seedlings, where indeed IAA stimulated growth.…”

Section: Discussionmentioning

confidence: 64%

“…Exogenous treatment with fungi is an environmentally friendly technology for improving the growth of plants and preventing disease. Soil fungi and endophytes secrete plant growth-promoting substances such as indole acetic acid (IAA) and gibberellins [8,22], whereas other secondary metabolites and antibiotic substances produced by such organisms inhibit the growth of phytopathogenic fungi [33]. Antagonistic microorganisms affect pathogenic organisms by parasitism, competition for nutrients or plant tissues, and antibiosis [1].…”

mentioning

confidence: 99%

See 1 more Smart Citation

IAA-Producing Penicillium sp. NICS01 Triggers Plant Growth and Suppresses Fusarium sp.-Induced Oxidative Stress in Sesame (Sesamum indicum L.)

Radhakrishnan

Shim²,

Lee³

et al. 2013

J. Microbiol. Biotechnol.

View full text Add to dashboard Cite

Application of rhizospheric fungi is an effective and environmentally friendly method of improving plant growth and controlling many plant diseases. The current study was aimed to identify phytohormone-producing fungi from soil, to understand their roles in sesame plant growth, and to control Fusarium disease. Three predominant fungi (PNF1, PNF2, and PNF3) isolated from the rhizospheric soil of peanut plants were screened for their growth-promoting efficiency on sesame seedlings. Among these isolates, PNF2 significantly increased the shoot length and fresh weight of seedlings compared with controls. Analysis of the fungal culture filtrate showed a higher concentration of indole acetic acid in PNF2 than in the other isolates. PNF2 was identified as Penicillium sp. on the basis of phylogenetic analysis of ITS sequence similarity. The in vitro biocontrol activity of Penicillium sp. against Fusarium sp. was exhibited by a 49% inhibition of mycelial growth in a dual culture bioassay and by hyphal injuries as observed by scanning electron microscopy. In addition, greenhouse experiments revealed that Fusarium inhibited growth in sesame plants by damaging lipid membranes and reducing protein content. Co-cultivation with Penicillium sp. mitigated Fusarium-induced oxidative stress in sesame plants by limiting membrane lipid peroxidation, and by increasing the protein concentration, levels of antioxidants such as total polyphenols, and peroxidase and polyphenoloxidase activities. Thus, our findings suggest that Penicillium sp. is a potent plant growthpromoting fungus that has the ability to ameliorate damage caused by Fusarium infection in sesame cultivation.

show abstract

Section: Discussionmentioning

confidence: 64%

mentioning

confidence: 99%

IAA-Producing Penicillium sp. NICS01 Triggers Plant Growth and Suppresses Fusarium sp.-Induced Oxidative Stress in Sesame (Sesamum indicum L.)

Radhakrishnan

Shim²,

Lee³

et al. 2013

J. Microbiol. Biotechnol.

View full text Add to dashboard Cite

show abstract

“…These compounds include IAA, which is an important phytohormone that is beneficial for plant growth and development. IAA is fabricated by microbes via tryptophan-dependent and -independent pathways (Chutima and Lumyong, 2012). In the current study, we found that the synthesis of IAA occurs via a tryptophan-dependent pathway, which is consistent with the reports by Rai et al (2014) and Waqas et al (2014).…”

Section: Discussionmentioning

confidence: 99%

Endophytes from medicinal plants and their potential for producing indole acetic acid, improving seed germination and mitigating oxidative stress

Khan

Gilani

Waqas

et al. 2017

J. Zhejiang Univ. Sci. B

View full text Add to dashboard Cite

Abstract:Medicinal plants have been used by marginal communities to treat various ailments. However, the potential of endophytes within these bio-prospective medicinal plants remains unknown. The present study elucidates the endophytic diversity of medicinal plants (Caralluma acutangula, Rhazya stricta, and Moringa peregrina) and the endophyte role in seed growth and oxidative stress. Various organs of medicinal plants yielded ten endophytes, which were identified as Phoma sp. (6 isolates), Alternaria sp. (2), Bipolaris sp. (1), and Cladosporium sp. (1) based on 18S rDNA sequencing and phylogenetic analysis. The culture filtrates (CFs; 25%, 50%, and 100% concentrations) from these endophytes were tested against the growth of normal and dwarf mutant rice lines. Endophytic CF exhibited dose-dependent growth stimulation and suppression effects. CF (100%) of Phoma sp. significantly increased rice seed germination and growth compared to controls and other endophytes. This growth-promoting effect was due to the presence of indole acetic acid in endophytic CF. The gas chromatography/mass spectrometry (GC/MS) analysis showed the highest indole acetic acid content ((54.31±0.21) µmol/L) in Bipolaris sp. In addition, the isolate of Bipolaris sp. exhibited significantly higher radical scavenging and anti-lipid peroxidation activity than the other isolates. Bipolaris sp. and Phoma sp. also exhibited significantly higher flavonoid and phenolic contents. The medicinal plants exhibited the presence of bio-prospective endophytic strains, which could be used for the improvement of crop growth and the mitigation of oxidative stresses.

show abstract

“…76 Researchers have also documented that auxin is not only involved in initiation, but also enhanced root growth. 77,78 Further, orchid roots are typically inhabited by fungal 79 and bacterial 80,81 symbionts that synthesize IAA. In epiphytes, auxin-producing rhizobacteria are located in the protective velamen layer.…”

Section: Root Induction and Growthmentioning

confidence: 99%