Cytological and physiological basis for tomato varietal resistance against <i>Alternaria alternata</i>

Ahmad, Aqeel; Shafique, Shazia

doi:10.1002/jsfa.6045

Cited by 22 publications

(15 citation statements)

References 26 publications

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“…Additionally, some potentially pathogenic fungi including F. oxysporum and A. alternate, were increased considerably in the nutrient solution or substrate samples. Of them, F. oxysporum can cause Fusarium wilt in tomato, and A. alternate is responsible for many tomato diseases, e.g., stem canker, black mold rot, leaf spot, early blight, and black shoulder disease [33][34][35]. We also identified P. krajdenii, a pathogenic fungus causing petri disease in grapevine [36].…”

Section: Discussionmentioning

confidence: 92%

Microbial community dynamics in the recirculating nutrient solution of tomato plug seedlings cultivated under ebb-and-flow system

Chen¹,

Li²,

Wang³

et al. 2019

Preprint

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Background: The ebb-and-flow system has ability to recirculate water and nutrients, and offers a good method to control nutrient leaching from greenhouses into the environment. However, the potential for the rapid spread of bacterial and fungal pathogens is the main hindrance for its adoption in vegetable seedlings production. Natural microflora has often shown a certain ability to suppress diseases.Results: Here, through 16S rRNA- and ITS1-targeted Illumina sequencing, the dynamic changes in bacterial and fungal communities in the recirculating nutrient solution were characterized for tomato plug seedlings cultivated in an ebb-and-flow system in summer and winter. Both bacterial number and microbial diversity in the nutrient solution increased with recirculating irrigation, and these changes differed between summer and winter. Pseudomonas was among the most predominant bacterial genera in the nutrient solution; its relative abundance gradually increased with recycling in summer but decreased dramatically in winter. In summer, the predominant bacteria also included Comamonas and Sediminibacterium , whose relative abundances in the nutrient solution decreased and increased, respectively. In winter, the nutrient solution was also colonized by Sphingomonas , predominantly at the late stage of irrigation. Among fungi, Amanita and Trichoderma were predominant in both summer and winter. Amanita gradually increased in summer but decreased rapidly after the first irrigation cycle in winter, whereas Trichoderma accumulated rapidly at the late stage of irrigation in both summer and winter. Alternaria and Fusarium were predominant in the nutrient solution only in summer, with the former decreased and the latter increased with recirculating irrigation. Moreover, Pseudomonas mediterranea , a potentially pathogenic bacterium, and Fusarium oxysporum , a fungal pathogen were present predominantly in winter and summer, respectively. Some potentially beneficial microbes functioning in plant-growth promotion and water self-purification, such as Sphingobium xenophagum , Trichoderma harzianum , and T. virens , were identified to be increased in the recirculating nutrient solution.Conclusions: The present data elucidate the bacterial and fungal dynamics in an ebb-and-flow system and provide useful information for pathogen control during tomato seedling production.

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Section: Discussionmentioning

confidence: 92%

Microbial community dynamics in the recirculating nutrient solution of tomato plug seedlings cultivated under ebb-and-flow system

Chen¹,

Li²,

Wang³

et al. 2019

Preprint

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“…It was recorded that three microbial applications i.e., AC1, AC6 and AC8 significantly elevated phenolics content in barley, which is an indication of stronger defense against a vast range of pathogens [70]. Moreover, phenolics exhibit anti-properties and play important role in therapeutic processes and healing of wounds [70].…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, phenolics exhibit anti-properties and play important role in therapeutic processes and healing of wounds [70]. Thus, human foods must contain sufficient amount of phenolics to provide curative and medicinal effects.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Bacterial Strains for the Induction of Plant Biochemicals, Nutritional Contents and Isozymes in Barley

Yousaf¹,

Qadir²,

Anjum³

et al. 2017

J Nutr Food Sci

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Acetobacter aceti was successfully used to induce transcriptional analysis, plant biochemical profile and nutritional contents in barley. Association of barley and microbial strain AC8 was reported best combination among other eight microbial strains of Bacillus in this study. AC8 microbial strain was identified as A. aceti from Fungal Culture Bank, Institute of Agricultural Science, University of the Punjab, Lahore, Pakistan. Different strains of A. aceti i.e., AC1, AC2, AC3… AC8 were analyzed as plant inducers and AC8 was screened out as best inducer in barley. It induced highest quantities of plant biochemical (i.e., phytosterols, phenolics, alkaloids and terpenoids) in barley. Current study revealed that among eight microbial strains AC8 had maximum potential to increase ascorbic acid, panthothenic acid, pyridoxine, thiamine and riboflavin in barley than other microbial strains. AC8 screened out among other microbial strains on the basis of its high vitamins induction potential. AC3 plus AC6 were reported second in the recorded list although other strains had a chronological reduction in vitamins as AC2>AC7>AC4>AC5 and AC1. Further evaluation of AC8 was done to check its efficiency for biochemicals, nutritional and isozyme contents induction in barley. Statistical analysis was performed using ANOVA and DMRT through DSAASTAT.

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“…Dinaar and Red Tara were used in this investigation due to their differential level of physiological responses against external stimuli. Cultivar Dinaar was metabolically more active and resistant against Alternaria alternata , while cultivar Red Tara was metabolically less active and susceptible toward the pathogen . The fungal cultures Alternaria alternata and P. oxalicum were maintained and revived on Malt Extract Agar (2%) medium (Millipore Sigma, Cat# 70145) after every month during the whole study period.…”

Section: Methodsmentioning

confidence: 99%

“…Cultivar Dinaar was metabolically more active and resistant against Alternaria alternata, while cultivar Red Tara was metabolically less active and susceptible toward the pathogen. 13 The fungal cultures Alternaria alternata and P. oxalicum were maintained and revived on Malt Extract Agar (2%) medium (Millipore Sigma, Cat# 70145) after every month during the whole study period. The inoculum of pathogenic Alternaria was prepared in distilled sterilized water keeping the spores concentration 3000 spores mL −1 .…”

Section: Procurement Of Fungal Species and Tomato Cultivarsmentioning

confidence: 99%

Benzenedicarboxylic acid upregulates O48814 and Q9FJQ8 for improved nutritional contents of tomato and low risk of fungal attack

et al. 2019

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BACKGROUND Tomato is an important food item and a cocktail of phytonutrients. In the current study, metabolites from a non‐pathogenic fungal species Penicillium oxalicum have been exploited to obtain nutritionally augmented tomato fruits from the plants to better withstand against Alternaria alternata infection. RESULTS Initially, bioactivity‐guided assay and chromatographic analyses identified the bioactive metabolites of P. oxalicum [benzenedicarboxylic acid (BDA) and benzimidazole]. Then, ≥3 times elevated quantities of vitamins and other nutritional elements (protein, fat, fibers, and carbohydrates) were achieved by the foliar application of BDA. The maximum increase (625.81%) was recorded in riboflavin contents; however, thiamine showed the second highest enhancement (542.86%). Plant metabolites analysis revealed that jasmonic acid contents were boosted 121.53% to significantly enhance guaiacyl lignin defenses along with the reduction in coumarin contents. The protein profile analysis explored three most actively responding protein species toward BDA applications, (i) palmitoyltransferase protein Q9FLM3; (ii) serine/threonine‐protein kinase O48814; and (iii) E3 ubiquitin‐protein ligase Q9FJQ8. The O48814 improved plant defenses; whereas, Q9FJQ8 protein was negatively regulating cysteine‐type endopeptidase activity and assisted plant to resist schedule alterations. Tomato cultivar with more active innate metabolism was found to be more responsive toward BDA. Furthermore, the bioactive compounds were enriched by using the two‐step extraction method of ethyl acetate and chloroform, respectively. CONCLUSION Penicillium oxalicum a non‐pathogenic fungal species, produced BDA, induced nutritional contents in tomato and protected it against Alternaria alternata. The current study is the first report on the bioactivity of BDA and benzimidazole concerning the nutritional enhancement and plant defense improvement. © 2019 Society of Chemical Industry

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Cytological and physiological basis for tomato varietal resistance against Alternaria alternata

Abstract: The resistant variety Dinaar had strong antifungal resistance and can therefore be recommended as suitable for cultivation in the agricultural system of Pakistan.

Cited by 22 publications

References 26 publications

Microbial community dynamics in the recirculating nutrient solution of tomato plug seedlings cultivated under ebb-and-flow system

Microbial community dynamics in the recirculating nutrient solution of tomato plug seedlings cultivated under ebb-and-flow system

Evaluation of Bacterial Strains for the Induction of Plant Biochemicals, Nutritional Contents and Isozymes in Barley

Benzenedicarboxylic acid upregulates O48814 and Q9FJQ8 for improved nutritional contents of tomato and low risk of fungal attack

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