Indole Acetic Acid Production and Growth-Promoting Activity of Methylobacterium extorquens MP1 and Methylobacterium zatmanii MS4 in Tomato

Pattnaik, Subhaswaraj; Rajkumari, Jobina; Parasuraman, Paramanandham; Siddhardha, Busi

doi:10.1080/19315260.2017.1283381

Cited by 24 publications

(3 citation statements)

References 26 publications

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“…Induction of longer roots was a growth response that might be attributed due to the production of Indole Acetic Acid (IAA) by Rhizobium sp. (Mohite, 2013), PPFM (Pattnaik et al, 2017), B. velezensis (Meng et al, 2016). The increase in seed germination and seedling length were considered typical gibberellins-like responses.…”

Section: Resultsmentioning

confidence: 99%

Co-inoculant Response of Microbial Consortia on Physiology of Blackgram [Vigna mungo (L.) Hepper] Seed Germination

Monisha¹,

Renganayaki²,

Sundareswaran³

et al. 2023

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Background: Blackgram (Vigna mungo (L.) Hepper) belonging to the Leguminoceae family is rich in protein. In this crop, biological seed treatment is an environmentally sound approach for improving the vigour of seeds. Besides legume-Rhizobium symbiosis, several other beneficial microbes play a crucial role in vigour enhancement in blackgram. Methods: The surface sterilised seeds were first coated with 20% gum acacia followed by the coating with bioinoculants viz., T0 - Control (Dry seed), T1 - Rhizobium sp. BMBS + Arbuscular Mycorrhizal Fungi (AMF) + Methylobacterium extorquens AM1 and T2 - Rhizobium sp. BMBS + AMF + Bacillus velezensis. Result: Inoculation of blackgram seeds with the Rhizobium sp. BMBS and AMF with Methylobacterium extorquens AM1 resulted in a significant increase in germination (97%), dry matter production (0.237 g 10 seedlings-1), vigour index (22.99) and seed mobilization efficiency (1.11) as compared to control seeds. The biochemical parameters such as á-amylase and proteases were found to be significantly higher in the Rhizobium sp. BMBS + AMF + Methylobacterium extorquens AM1 inoculated seeds. Changes in root exudates composition due to co-inoculation assessed through GC-MS, indicated compounds with antioxidant and antimicrobial activities. Our results confirmed that the positive interaction of rhizobial strain BMBS and AMF with Methylobacterium extorquens AM1 may emerge as a novel bio-inoculant for sustainable pulse productivity.

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Section: Resultsmentioning

confidence: 99%

Co-inoculant Response of Microbial Consortia on Physiology of Blackgram [Vigna mungo (L.) Hepper] Seed Germination

Monisha¹,

Renganayaki²,

Sundareswaran³

et al. 2023

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“…172 Increased production of IAA by the foliar application of M. extorquens MP1 isolated from Peach (Prunus persica L.) phyllosphere and M. zatmanii MS4 from Strawberry (Fragaria ananassa L.) employing leaf imprint method augmented the growth of tomato plants compared to uninoculated control. 173 Methylobacterium extorquens MM2 obtained from the phyllosphere of mustard leaf increased the production of IAA in plants which in turn enhanced the plant growth. 66 Methylobacterium sp.…”

Section: Ppfm As Potential Plant-growth Promotersmentioning

confidence: 99%

Pink Pigmented Facultative Methylotrophs (PPFMs): Potential Bioinoculants for Sustainable Crop Production

Nysanth¹,

Rajan²,

Sivapriya³

et al. 2023

J. Pure Appl. Microbiol.

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Bacteria belonging to the genus Methylobacterium, popularly known as pink pigmented facultative methylotrophic (PPFM) bacteria, are well known for their distinct ability to use single-carbon compounds like methanol, formate and formaldehyde, and also a variety of multi-carbon substrates lacking carbon-carbon bonds. These bacterial groups are ubiquitously distributed, especially in phyllosphere and rhizosphere, and their occurrence have been reported in more than 100 species of plants so far. PPFMs have profound influence on soil fertility, crop growth and yield. The ability for phosphate acquisition, nitrogen fixation, iron chelation and phytohormone production indicate the possibility of developing them as promising biofertilizer candidates. In addition, many of them possess biocontrol activity against several phytopathogens. PPFMs induce several physiological changes in plants, making the plants more resistant to biotic and abiotic stress. They can therefore be promising alternatives to conventional chemical inputs in sustainable agricultural systems.

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“…Stimulating effect is due to cytokinin which was maximum at early stages of plant growth and subsequently declined at later stages [15]. M. extorquens MP1 and M. zatmanii MS4 are good producer of IAA and its foliar spray improved plant growth promotion of tomato plants [47]. Methylobacterium isolate Mt-Tm-13 significantly increased seed germination percentage (100%), vigor index, early emergence of radical and 1% v/v foliar spray enhanced overall performance of tomato plants suggest a possible bioinoculant for sustainable cultivation of tomato plants [46].…”

Section: Growth Promotory Eventsmentioning

confidence: 99%

Prospect of pink pigmented facultative methylotrophs in mitigating abiotic stress and climate change

et al. 2022

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Apparently, climate change is observed in form of increased greenhouse gases (CH 4 , CO 2 , N 2 O, CFC), temperature (0.5-1°C), and UV radiations (UV B and UV C). It is affecting every aspect of ecosystem functioning; however, terrestrial crops are the most vulnerable group and crop productivity largely remains a challenge. Due to climate change, seed yield and nutrient depletion are inevitable in future scenarios. To overcome this problem microbial groups that exhibit plant growth promoting attributes and provide protection against environmental stress should be studied. One such group is the pink pigmented facultative methylotrophs (PPFMs) that can induce overall fitness to plants.PPFMs are involved in phosphorous mineralization, siderophore, ACC deaminase, phytohormone production, and assimilation of greenhouse gases. Additionally, these organisms can also resist harmful UV radiations effectively as they possess polyketide synthases that could serve as source of novel bioactives that can protect plant from abiotic stress. The review article comprehensively highlights the multifunctional traits of PPFMs and their role in mitigating climate change with an aim to use this important organism as microbial inoculants for sustainable agriculture under climate-changing scenarios.climate change, greenhouse gases, phyllosphere, pink pigmented facultative methylotrophs, terrestrial crops | INTRODUCTIONMethylotrophs belong to diverse classes of α, β, and γ proteobacteria group, they are gram-negative, rodshaped, strict aerobic microbes. Methylotrophy is also exhibited by members of Verrucomicrobia, Firmicutes, Flavobacterium, and Actinobacteria [1]. A small group of methylotrophs encompassing 51 species appear pink in color due to carotenoid pigments and are often referred as pink pigmented facultative methylotrophs (PPFMs) (http://www.bacterio.net/methylobacterium.html). Methylorubrum extorquens is the best-studied member of

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Indole Acetic Acid Production and Growth-Promoting Activity of Methylobacterium extorquens MP₁ and Methylobacterium zatmanii MS₄ in Tomato

Cited by 24 publications

References 26 publications

Co-inoculant Response of Microbial Consortia on Physiology of Blackgram [Vigna mungo (L.) Hepper] Seed Germination

Co-inoculant Response of Microbial Consortia on Physiology of Blackgram [Vigna mungo (L.) Hepper] Seed Germination

Pink Pigmented Facultative Methylotrophs (PPFMs): Potential Bioinoculants for Sustainable Crop Production

Prospect of pink pigmented facultative methylotrophs in mitigating abiotic stress and climate change

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