Biological inductions of systemic resistance to collar rot of peppermint caused by Sclerotium rolfsii

Muthukumar, A.; Venkatesh, A.

doi:10.1007/s11738-014-1520-1

Cited by 11 publications

(7 citation statements)

References 39 publications

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“…Phenolics accumulation is the key defense mechanism in plants in response to pathogen infection as reported in previous work by Singh and Gaur (2017) in chickpea crop. Similarly, peroxidase and polyphenol oxidase enzymatic activity were increased in fungal challenged pea plants under plant growth promoting endophyte treatment in agreement with previous studies by Muthukumar and Venkatesh (2014) and Khodadadi et al (2016) . Polyphenol oxidase (PPO; EC 1.10.3.1), a copper metalloenzyme oxidize phenolics to toxic and highly reactive o-quinones which either induce direct toxicity to pathogens or render low bioavailability of protein and create a physical barrier to pathogen attack ( Zhang and Sun, 2021 ).…”

Section: Discussionsupporting

confidence: 92%

Decoding the Plant Growth Promotion and Antagonistic Potential of Bacterial Endophytes From Ocimum sanctum Linn. Against Root Rot Pathogen Fusarium oxysporum in Pisum sativum

2022

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The present study demonstrates plant growth promotion and induction of systemic resistance in pea (Pisum sativum) plant against Fusarium oxysporum f.sp. pisi by two bacterial endophytes, Pseudomonas aeruginosa OS_12 and Aneurinibacillus aneurinilyticus OS_25 isolated from leaves of Ocimum sanctum Linn. The endophytes were evaluated for their antagonistic potential against three phytopathogens Rhizoctonia solani, F. oxysporum f. sp. pisi, and Pythium aphanidermatum by dual culture assay. Maximum inhibition of F. oxysporum f. sp. pisi was observed by strains OS_12 and OS_25 among all root rot pathogens. Scanning electron microscopy of dual culture indicated hyphal distortion and destruction in the case of F. oxysporum f. sp. pisi. Further, volatile organic compounds (VOCs) were identified by gas chromatography–mass spectrometry (GC-MS). The GC-MS detected eight bioactive compounds from hexane extracts for instance, Dodecanoic acid, Tetra decanoic acid, L-ascorbic acid, Trans-13-Octadecanoic acid, Octadecanoic acid. Both the endophytes exhibited multifarious plant growth promoting traits such as indole acetic production (30–33 μg IAA ml–1), phosphate solubilization, and siderophore and ammonia production. Pot trials were conducted to assess the efficacy of endophytes in field conditions. A significant reduction in disease mortality rate and enhancement of growth parameters was observed in pea plants treated with consortium of endophytes OS_12 and OS_25 challenged with F. oxysporum f.sp. pisi infection. The endophytic strains elicited induced systemic resistance (ISR) in pathogen challenged pea plants by enhancing activities of Phenylalanine ammonia lyase (PAL), peroxidase (PO), polyphenol oxidase (PPO), ascorbate oxidase (AO), catalase (CAT) and total phenolic content. The endophytes reduced the oxidative stress as revealed by decrease in malondialdehyde (MDA) content and subsequently, lipid peroxidation in host plant leaves. Robust root colonization of pea seedlings by endophytes was observed by scanning electron microscopy (SEM) and fluorescence microscopy. Thus, plant growth promoting endophytic P. aeruginosa and A. aneurinilyticus can be further exploited through bio-formulations for sustainable protection of crops against root rot diseases as bio-control agents.

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Section: Discussionsupporting

confidence: 92%

Decoding the Plant Growth Promotion and Antagonistic Potential of Bacterial Endophytes From Ocimum sanctum Linn. Against Root Rot Pathogen Fusarium oxysporum in Pisum sativum

2022

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“…The results of the present study clearly indicated that the combined application of T9-T. harzianum (THM) + P. fluorescens (PFV) (ST+ SA) recorded the minimum incidence of stem rot with maximum plant height and yield of cluster bean. Similar observations were made by Muthukumar and Venkatesh (2014) reported that the combined application of T. harzianum + P. fluorescens through seedling dip treatment recorded minimum incidence of collar rot of peppermint caused by S. rolfsii. The combined application of antagonistic bacterial formulations EPI (Pf-5) +KGI (Bs-4) +KPI (Pf-7) recorded minimum wilt incidence and increased plant height, dry weight and fruit yield of tomato when compared to control (Sundaramoorthy and Balabaskar, 2013).…”

Section: In Vitro Inhibition Of Mycelial Growthsupporting

confidence: 88%

“…The use of biocontrol agents is gaining importance for their plant growth promotion and disease reduction abilities (Nagamma and Nagaraja, 2015;Dwivedi and 163 Prasad, 2016;Dhivya, 2020). The successful application of antagonistic microorganisms for the control of S. rolfsii has been reported by several workers in various crops (Muthukumar and Venkatesh et al, 2014;Ekundayo et al, 2015;Pacheco et al, 2016). With this background, the present study has been undertaken with the following objectives.…”

mentioning

confidence: 94%

Evaluation of Native Antagonists for the Management of Stem Rots of Cluster Bean Caused by Sclerotium Rolfsii Sacc.

Muthukumar¹,

Raj²,

Sudha³

et al. 2022

JBiopest

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Cluster bean, Cyamopsis tetragonoloba (L.) Taub is an important annual legume crop of kharif season in arid and semi-arid regions of the Indian subcontinent. Six fungal antagonists and four bacterial antagonists were evaluated against Sclerotium rolfsii in vitro and in vivo condition to develop an effective management strategy for stem rot of cluster bean. During in vitro studies, native fungal and bacterial antagonists were inhibited the mycelial growth of pathogen. Among the fungal antagonists tested, the isolate-I4 (THM) showed the maximum growth inhibition of S. rolfsii up to 68.10 per cent. The bacterial antagonist Isolate-I3 (PFV) recorded the maximum inhibition zone of 13.33 mm and a minimum of 23.00 mm mycelial growth of S. rolfsii. Pot culture studies revealed that the combined application of T9-T. harzianum (THM) + P. fluorescens (PFV) (ST+ SA) through seed treatment and soil application recorded the minimum incidence of stem rot (4.66 per cent) and maximum plant height, number of pods/plant and pod length.The findings reported in the present study supported the applicability of isolate-I4 (THM) Isolate-I3 (PFV) as a possible alternative to fungicides for the control of root rot in black gram.

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“…The genus Mentha includes different species like water mint ( M. aquatica ), spearmint ( Mentha spicata ), wild mint ( M. arvensis ), pennyroyal ( M. pulegium ), peppermint ( M. piperita ), pine apple mint ( M. suaveolens ), ginger mint ( M. gracilis ) and horsemint ( M. longifolia ) (Bhat, Maheshwari, Kumar, & Kumar, ). These species are commercially cultivated in India, China, Brazil, United States, France, Thailand, and Vietnam (Muthukumar & Venkatesh, ). Mint is also known for its aromatic and medicinal properties.…”

Section: Introductionmentioning

confidence: 99%

“…and Vietnam (Muthukumar & Venkatesh, 2014). Mint is also known for its aromatic and medicinal properties.…”

mentioning

confidence: 99%

Low‐temperature drying characteristics of mint leaves in a continuous‐dehumidified air drying system

Venkatachalam¹,

Vellingri

Selvaraj³

2020

J Food Process Engineering

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Low‐temperature drying seems a better alternative option for drying heat labile products, especially leafy vegetables. In this article, the thin layer drying characteristics of mint leaves are studied using a continuous‐dehumidified air produced by molecular sieve 13X based heatless pressure swing adsorption (PSA) system. The PSA system consists of an air compressor with after cooler, two adsorber towers, and drying chamber. The optimum process parameters of adsorption system are identified through Box Wilson Central Composite experimental design to produce continuous‐dehumidified air suitable for low‐temperature drying applications ranging from 35 to 37°C dry bulb temperature and 0.1% rh. The performance indices of the PSA system such as thermal effectiveness and dehumidification efficiency at optimal conditions are observed as 0.884 and 96.40%, respectively. The effect of the volume flow rate of continuous‐dehumidified air on mint leaves drying characteristics is also studied, and the initial moisture content of leaves is reduced from 83.45% (wb) to less than 10% (wb) in 6 hr at the volume flow rate of 0.160 m3/min. The effective moisture diffusivity value for varied volume flow rates of air is varying from 2.07534 × 10−11 to 3.45817 × 10−11 m2/s. The ascorbic acid retention percentage in dried mint leaves is increased with increase in volume flow rate of dehumidified air, and the maximum of 70.11% is achieved at 0.160 m3/min. Based on the regression analysis, the most suitable drying model to describe the low‐temperature drying characteristics of mint leaves is the Midilli and Kucuk model. It is noted that the low‐temperature drying is the most appropriate drying method for retaining the good amount of ascorbic acid. Practical applications Highly suitable for heat‐sensitive products' drying especially medicinal herbs, spicy (leafy) vegetables. Production of continuous‐dehumidified air (with ultra‐low dew point) for sensitive applications like pharmaceutical, lithium battery manufacturing, defense, chemicals, electronics, leather, and so forth.

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Biological inductions of systemic resistance to collar rot of peppermint caused by Sclerotium rolfsii

Cited by 11 publications

References 39 publications

Decoding the Plant Growth Promotion and Antagonistic Potential of Bacterial Endophytes From Ocimum sanctum Linn. Against Root Rot Pathogen Fusarium oxysporum in Pisum sativum

Decoding the Plant Growth Promotion and Antagonistic Potential of Bacterial Endophytes From Ocimum sanctum Linn. Against Root Rot Pathogen Fusarium oxysporum in Pisum sativum

Evaluation of Native Antagonists for the Management of Stem Rots of Cluster Bean Caused by Sclerotium Rolfsii Sacc.

Low‐temperature drying characteristics of mint leaves in a continuous‐dehumidified air drying system

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