Transcriptome dynamics underlying elicitor-induced defense responses against Septoria leaf spot disease of tomato (Solanum lycopersicum L.)

Mani, Sumithra Devi; Pandey, Saurabh; Govindan, Muthukumar; Muthamilarasan, Mehanathan; Radhakrishnan, N.

doi:10.1007/s12298-021-00970-y

Cited by 7 publications

(4 citation statements)

References 72 publications

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“…In our study, higher concentrations of MJME pre‐treated leaves (10 and 25 μM) registered maximum activity of SOD upon pathogen infection when compared with control and A. solani alone infected leaves in both susceptible and resistant cultivars. A similar trend in SOD activity was reported earlier in tomato plants pre‐treated with sulfamethoxazole, and κ‐carrageenan before pathogen infection effectively increased the overexpression of SOD which eventually resulted in reduced disease symptoms (Mani, Pandey, et al, 2021; Thinakaran et al, 2020). From these results, it can be suggested that the pre‐treatment of MJME at higher concentrations potentially elevates SOD activity, thereby conferring resistance against A. solani infection in tomato plants.…”

Section: Discussionsupporting

confidence: 84%

Foliar application of Methyl Jasmonate Methyl Ester elicits differential antioxidant defence and expression of defence‐related genes against early blight disease of tomato

Kamakshi,

MohanaPrasad,

Muthamilarasan

et al. 2023

Journal of Phytopathology

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Phytohormones are the key regulators of various developmental and physiological processes in plants. In the present study, we have examined the efficacy of Methyl Jasmonate Methyl Ester (MJME) as a potent elicitor on inducing resistance factors against early blight disease of tomato. Both PKM1 (susceptible) and Arka Rakshak (resistant) cultivars of tomato were sprayed with different concentrations of MJME (1, 5, 10 and 25 μM) and/or infected with A. solani. MJME pre-treatment followed by A. solani infected leaves showed a higher accumulation of superoxide anion radicals and hydrogen peroxide at the early stages and then decreased gradually in both resistant and susceptible cultivars. A significant increase in antioxidant enzyme activity such as superoxide dismutase, guaiacol peroxidase and catalase was evident in MJME pre-treatment followed by A. solani infected leaves in susceptible cultivar of tomato compared with control. Manifestation of disease symptoms was reduced to 60% in tomato leaves pre-treated with higher concentrations of MJME and infected with A. solani in susceptible cultivar on par with resistant cultivar. Quantitative real-time polymerase chain reaction (qRT-PCR) analysis revealed an induction of expression of defence-related genes such as ACO1, EDS1, LoxD, NP24, NPR1 and Sl10EAH30 in tomato leaves pre-treated with MJME followed by A. solani infection. Interestingly, a two-fold increase in the expression of EDS1 gene was evident in both susceptible and resistant cultivars after MJME treatment compared with control. The present study showed that MJME could be a potential elicitor of resistance factors against the early blight disease of tomato.

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Section: Discussionsupporting

confidence: 84%

Foliar application of Methyl Jasmonate Methyl Ester elicits differential antioxidant defence and expression of defence‐related genes against early blight disease of tomato

Kamakshi,

MohanaPrasad,

Muthamilarasan

et al. 2023

Journal of Phytopathology

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“…Symptoms appear on the leaves in the form of circular, elliptical necrotic lesions with brown to grey centres [ 24 ]. Mani et al [ 25 ] point out that the leaf spot disease causes enormous damage in tomato plants at any stage of plant development by entering through the stomata or penetrating the epidermis.…”

Section: Tomato Diseases and Pathogensmentioning

confidence: 99%

Bacillus Species: Excellent Biocontrol Agents against Tomato Diseases

Karačić,

Miljaković,

Marinković

et al. 2024

Microorganisms

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Tomatoes encounter many pathogens, such as fungi and bacteria, which reduce the yield and quality of plants and lead to large losses in production. The application of plant protection products (PPPs) is still an important and most effective measure to control plant diseases. However, the use of chemicals in agriculture contributes to environmental pollution and biodiversity loss, and it can also threaten non-target living organisms. Biological control is a widely accessible, environmentally safe, and cost-efficient alternative for the prevention and suppression of plant diseases. Bacillus species with antimicrobial and plant growth-promoting effects are most frequently used as biocontrol agents to increase the resilience of agricultural production against biotic stresses. The present review discusses the antagonistic mechanisms and the biocontrol potential of Bacillus spp. against tomato diseases caused by different pathogens. The main mechanisms of Bacillus spp. include the production of antimicrobial compounds (antibiotics, extracellular enzymes, siderophores, and volatile compounds), competition for nutrients and space, and induced systemic resistance (ISR). Although Bacillus-based PPPs have been developed and commercialised worldwide for various crops and pathogens, the efficiency issues are still subject to debate. Additionally, a combined strategy for controlling tomato diseases based on Bacillus spp. and other available methods (conventional or natural-based) is a promising research field.

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“…These spots are accompanied by black pycnidia, leading to extensive damage across the entire leaf Management of Phytopathogens by Antagonistic Bacillus spp in Tomato Crop DOI: http://dx.doi.org/10.5772/intechopen.112439 area [132,133]. The disease also manifests as small, dark lesions measuring approximately 1-8 mm in diameter on stems, peduncles, and calyxes [134]. This ultimately results in a significant reduction in fruit yield, not only due to the loss of photosynthetic area but also because the fruit becomes more susceptible to sunburn.…”

Section: Septoria Leaf Spot Diseasementioning

confidence: 99%

Management of Phytopathogens by Antagonistic Bacillus spp in Tomato Crop

Iqbal,

Li,

Ahmed Rajput

et al. 2024

Tomato Cultivation and Consumption - Innovation and Sustainability

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Bacillus is a genus of gram-positive bacteria that is widely distributed in the environment. The species of this genus present in the endosphere, phyllosphere and rhizosphere in the plant and perform as a beneficial biocontrol agent and promote plant health. These strains exhibit diverse capabilities, including the potentiality to directly suppress the germination of microbial, stimulate plant development, reduce pathogen infections, degrade different types of hydrocarbons, function effectively across a wide temperature range, and induce immune resistance in host plants. The species/strains of Bacillus genus have proven promising biocontrol agents against a large number of fungal and bacterial causal organism, as well as plant-damaging insects. They induce a wide range of composites with antifungal properties, such as iturin, surfactin, cyclic lipopeptides, bacillomycin, bacteriocins, polyketide, lentibiotics, phospholipid, polyketide microlectine, isocosmarin and amino sugar. These compounds play a crucial role in preventing and controlling diseases in plants. The synthesis of these compounds is initiated in response to the presence of bacterial and fungal pathogen biomass and their cell walls. The purpose of this review is to offer a thorough exploration of the disease suppression mechanisms utilized by Bacillus, with a specific emphasis on their function as plant growth-promoting rhizobacteria (PGPR).

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Transcriptome dynamics underlying elicitor-induced defense responses against Septoria leaf spot disease of tomato (Solanum lycopersicum L.)

Cited by 7 publications

References 72 publications

Foliar application of Methyl Jasmonate Methyl Ester elicits differential antioxidant defence and expression of defence‐related genes against early blight disease of tomato

Foliar application of Methyl Jasmonate Methyl Ester elicits differential antioxidant defence and expression of defence‐related genes against early blight disease of tomato

Bacillus Species: Excellent Biocontrol Agents against Tomato Diseases

Management of Phytopathogens by Antagonistic Bacillus spp in Tomato Crop

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