In vitro Screening of Native Banana Rhizospheric Microbes and Endophytes of Assam against Fusarium oxysporum f. sp. cubense

Baruah, Neethi; Bhattacharyya, Ashok; Thangavelu, R; Puzari, K. C.

doi:10.20546/ijcmas.2018.706.188

Cited by 5 publications

(5 citation statements)

References 22 publications

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“…Bio-fertilizer considerably increased the proportion of Rhizopus arrhizus in both oat cultivars. Rhizopus arrhizus has been widely used for bio-remediation of saline-alkaline soil [ 33 , 34 ], and belongs to the phylum Zygomycota , which contains species that are known to produce organic acids like malic, citric, fumaric acid that can inhibit pathogens [ 32 , 55 ]. Indeed, the application of bio-fertilizer increased malic, citric and fumaric acid, resulting in higher total organic acid levels, especially in the rhizosphere of Baiyan2, which had a significant positive relationship with Rhizopus abundance.…”

Section: Discussionmentioning

confidence: 99%

“…The bio-fertilizer also significantly limited Ascomycota , as well as Alternaria , Cladosporium , Sarocladium and Heydenia , which are all associated with disease and frequently occur together [ 54 , 56 – 58 ]. This may be due to the increased in organic acids in the rhizosphere as a result of the amendment [ 55 ]. However, the bio-fertilizer also significantly reduced fungal diversity by increasing organic acid levels.…”

Section: Discussionmentioning

confidence: 99%

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Response of oat morphologies, root exudates, and rhizosphere fungal communities to amendments in a saline-alkaline environment

Yang

et al. 2020

PLoS ONE

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The application of organic amendments to saline-alkaline soil has been recommended as an agricultural strategy to improve crop productivity and soil health. However, there has been limited research on how organic soil amendment strategies affect the health of oats and their associated rhizosphere fungal communities in saline-alkaline conditions. Thus, the objectives of this study were to understand the effects of oat cultivars with contrasting saline-alkaline tolerances and different amendments on plant morphologies, root exudates (soluble sugars and organic acids), and rhizosphere fungal communities in a saline-alkaline environment. Experiments were conducted on a saline-alkaline tolerant cultivar, Baiyan2, and a saline-alkaline sensitive cultivar, Caoyou1, under four different organic amendment strategies: 1. control (no amendment application), 2. bio-fertilizer application, 3. rotten straw application, and 4. a co-application of bio-fertilizer and rotten straw. Results showed that plant morphological characters of Baiyan2 were better than Caoyou1, and that soluble sugar and organic acid levels in the rhizosphere of Baiyan2 were significantly lower than Caoyou1. Compared to the control, oat root and plant development was significantly improved by the combined bio-fertilizer and rotten straw amendment. Bio-fertilizer application promoted malic and citric acid levels, contributing to a higher total organic acid level, and significantly increased the abundance of Rhizopus arrhizus and decreased the abundance of the fungal pathogens Alternaria, Cladosporium, Sarocladium and Heydenia of Ascomycota in both oat cultivars. All amendment treatments containing rotten straw, except the combined amendment in Baiyan2, significantly increased the relative abundance of Ascomycota (specifically Gibberella, Talaromyces, Fusarium, and Bipolaris) and decreased the relative abundance of R. arrhizus by reducing soluble sugar and organic acid levels. For the combined amendment in Baiyan2, there were no significant changes in Gibberella and Rhizopus between the control and amendment treatment. Our results suggest that co-application of bio-fertilizer and rotten straw, combined with a tolerant oat cultivar, is an effective method to increase crop productivity and enhance soil health in a saline-alkaline environment.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Response of oat morphologies, root exudates, and rhizosphere fungal communities to amendments in a saline-alkaline environment

Yang

et al. 2020

PLoS ONE

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“…Such reports of positive compatibility amongst the rhizospheric microbes have been reported by many researchers (Dandurand and Knudsen 1993;Duffy et al, 1996;Raupach and Kloepper, 1998). Further, since they are of one fungus their compatibility is justified (Thangavelu and Gopi, 2015a;Baruah et al, 2018).…”

Section: In Vitro Testing Of Effective Rhizospheric Microbes For Their Compatibilitymentioning

confidence: 84%

Study on the Different Modes of Action of Potential Trichoderma spp. from Banana Rhizosphere against Fusarium oxysporum f.sp. cubense

hawmi¹,

Bhattacharyya²

2019

Int.J.Curr.Microbiol.App.Sci

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An attempt was made to study the different modes of action of the promising Trichoderma spp. from banana rhizosphere collected from different regions of Assam, Mizoram, Meghalaya and Nagaland. The results from the present investigation revealed that all the potential Trichoderma spp. produced IAA, NH 3 , siderophore and HCN, though at different levels however, the promising Trichoderma spp. were not able to solubilize phosphate on solid medium containing insoluble inorganic phosphorus source. Considering the possibility of an improved potentiality of combined application, a study was also undertaken to check the effect of combined application of the Trichoderma spp. against Fusarium oxysporum f.sp. cubense (Foc), the causal organism of Fusarium wilt of banana. The per cent inhibition over control was calculated after 48, 72 and 96 hours after inoculation. The result revealed that the efficacy of all the treatments differed significantly with that of control at all the intervals. The per cent inhibition of radial growth of Foc in vitro was observed highest by the combination of the three Trichoderma spp. viz. T. reesei (RMF-25), T. reesei (RMF-13) and T. harzianum (RMF-28) with 69.18 per cent followed by the combination of T. reesei (RMF-25), and T. harzianum (RMF-28) with 66.86 per cent and combination of T. reesei (RMF-13) and T. harzianum (RMF-28) with 68.60 per cent inhibition of the test pathogen after 96 hours of incubation.

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“…cubense. Management of Race 1 of the pathogen have been successfully addressed by several workers using strains of Trichoderma spp (Baruah et al 2018). Anuratha et al (1990) reported management of Moko disease, another disease of banana caused by bacterial pathogen R. solanacearum through application of P. fluorescens and B. subtilis.…”

Section: Microbial Interventions and Disease Managementmentioning

confidence: 99%

Disease management in horticulture crops through microbial interventions: An overview

Bora

2020

Indian J Agri Sci

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Horticultural crops-based nutritional security is now a buzz word to Indian agriculture. Significant level of progress has been made towards the management of some pandemic pathogens affecting the production economics of horticultural crops. Some of these pathogens are : Fusarium oxysporum, Ralstonia solanacearum, Pythium spp., Phytophthora spp, Xanthomonas spp., Colletotrichum spp., Pencillium spp , Alternaria spp etc. Many soil-borne diseases as well as post harvest fungi are effectively addressed through a variety of bioagents belonging to predominant microbial genera represented by Trichoderma spp., Bacillus spp., Gliocadium spp. and fluorescent Pseudomonads. Our thumping success with different microbial bioformulations showed an effective control of both pests and diseases in major crops of northeast India comprising tea, banana, turmeric, ginger, in addition to bacterial wilt of Bhoot jolokia, tomato, hydroponic lettuce and Rhizoctonia- induced root rot management of chilli and patchouli. These area wide and crop wide results put forth a renewed claim in favour of developing a vibrant organic horticulture in years to come. All these issues are analysed highlighting the future use of rhizospheric and endophytic plant beneficial microbes as dominant communities.

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In vitro Screening of Native Banana Rhizospheric Microbes and Endophytes of Assam against Fusarium oxysporum f. sp. cubense

Cited by 5 publications

References 22 publications

Response of oat morphologies, root exudates, and rhizosphere fungal communities to amendments in a saline-alkaline environment

Response of oat morphologies, root exudates, and rhizosphere fungal communities to amendments in a saline-alkaline environment

Study on the Different Modes of Action of Potential Trichoderma spp. from Banana Rhizosphere against Fusarium oxysporum f.sp. cubense

Disease management in horticulture crops through microbial interventions: An overview

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