Protection of strawberry plants (Fragaria ananassa Duch.) against anthracnose disease induced by Azospirillum brasilense

Tortora, María L.; Ricci, Juan C. Díaz; Pedraza, Raúl O.

doi:10.1007/s11104-011-0916-6

Cited by 50 publications

(43 citation statements)

References 55 publications

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“…We speculate also that in addition to promoting plant growth, azospirilla, like methylobacteria and pseudomonads, can induce systemic resistance to stress in regenerated potato plants. An indication of this can be found in a study by Tortora et al (2012). In our experiments, the inoculated plants began vegetative growth quicker (at the cost of their enhanced adaptability) and formed more leaves with a larger surface area ( Table 2).…”

Section: Bacterial Influence On the Field Growth Of In Vitro-microprosupporting

confidence: 71%

Improved potato microclonal reproduction with the plant growth-promoting rhizobacteria Azospirillum

Tkachenko

Evseeva

Boikova

et al. 2015

Agron. Sustain. Dev.

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Microclonal propagation in vitro is being actively used in the production of healthy planting material of food and ornamental plants. However, it needs further improvement to increase the growth rates of microclones in vitro and enhance regenerant survivability ex vitro. A promising approach to this end could be inoculating in vitro-micropropagated plants with plant growth-promoting rhizobacteria, specifically Azospirillum. However, the influence of Azospirillum inoculation on microclone behavior throughout the production process, including plant adaptation ex vitro and food crop productivity, has been underinvestigated. In this study, in vitrogrowing potato (Solanum tuberosum L.) microclones were inoculated with Azospirillum brasilense strain Sp245. The microclones were then grown on in soil in the greenhouse and field, with the experiment lasting for 120 days. Rootassociated bacteria were identified immunochemically, and the mitotic index of root meristematic cells was determined by a cytological method. The plant morphological parameters determined were shoot length, number of nodes per shoot, number of roots per plant, maximal root length, leaf area, percentage of surviving plants in the soil, and tuber yield and weight. Our results show that bacterial inoculation of potato microclones in vitro enhances plant adaptive capacity ex vitro and increases minituber yield. The percent survival index of field-grown inoculated plants was 1.5-fold greater than that of uninoculated plants. The overall tuber weight per plant was more than 30 % greater in the inoculated plants than it was in the control ones. For all cultivars on average, tuber yield per square meter increased by more than 45 % as a result of inoculation in vitro. This study is the first to report that Azospirillum inoculation of potato microclones not only improves the quality of planting material produced in vitro but also significantly increases minituber yield through enhancing plant adaptive capacity in the field.

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Section: Bacterial Influence On the Field Growth Of In Vitro-microprosupporting

confidence: 71%

Improved potato microclonal reproduction with the plant growth-promoting rhizobacteria Azospirillum

Tkachenko

Evseeva

Boikova

et al. 2015

Agron. Sustain. Dev.

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“…However, certain PGPR do not induce PR proteins (Hoffl and et al 1995 ;van Wees et al 1997 ) but rather increase accumulation of peroxidase, phenylalanine ammonia lyase, phytoalexins, polyphenol oxidase, and/or chalcone synthase (Van Peer et al 1991 ;Ongena et al 2000 ;Chen et al 2000 ). They can stimulate callose deposit whereas no callose accumulation is observed in plants treated only with a pathogen (Tortora et al 2012 ). Callose accumulation contributes to the reinforcement of the cell wall at the sites where the pathogen attacks.…”

Section: Rhizobacteria Able To Reduce Stress In Plantsmentioning

confidence: 99%

“…Azospirillum can reduce the incidence and severity of damping off caused by Rhizoctonia solani (Gupta et al 1995 ), foliar diseases of tomato caused by Pseudomonas syringae pv. tomato (Bashan and de-Bashan 2002 ;Romero et al 2003 ), crown gall disease (Bakanchikova et al 1993 ), Cucumis sativus disease (Hassouna et al 1998 ), bacterial leaf blight of mulberry (Sudhakar et al 2000 ), Prunus cerasifera disease (Russo et al 2008 ), anthracnose symptoms on strawberry plants (Tortora et al 2012 ), and can enhance disease resistance in rice (Yasuda et al 2009 ).…”

Section: Alleviation Of Biotic Stresses By Azospirillummentioning

confidence: 99%

Alleviation of Abiotic and Biotic Stresses in Plants by Azospirillum

Vacheron

Renoud

Müller

et al. 2015

Handbook for Azospirillum

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In the face of global changes, plants must adapt to a wide range and often combined biotic and abiotic stresses that seriously impaired plant growth and development. Plants develop complex strategies to deal with water stress conditions, soil fertility losses, soil pollutions, pests, and disease. Emerging evidence suggest the involvement of common hormonal players in plant defense signaling pathways triggered in response to biotic and abiotic stresses. Besides plant strategies, plant growth-promoting rhizobacteria (PGPR), which colonize the root system and establish cooperative interactions with plants can improve their growth and help them to adapt to and cope with multiple stresses including drought, salinity, heavy metal pollutions, and parasites. Accordingly, PGPR supply added values to the plant defense strategies by expressing many relevant functions for modulating the plant hormonal balance, increasing nutrients supply to the plant, improving the functional and phy sical properties of protective barriers against plant parasites. Among PGPR, Azospirillum strains were long viewed as biofertilizers and less as biocontrol agents. It is becoming evident that Azospirillum is able to protect plants against a myriad of detrimental conditions. This review provides an update of works regarding the ability of Azospirillum strains to alleviate plant stress and brings out the relevant involved plant-benefi cial functions. Developing PGPR-based bio-inoculants is a promising strategy to improve the growth and health of crops and develop sustainable agriculture.

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“…Mechanical wounding, physiological stress and phytopathogen infection can induce callose synthesis (Tortora et al 2012). Callose, a linear β-1,3-glucan with some β-1,6-branches, plays important roles during a variety of processes in plant development and in response to multiple biotic and abiotic stresses (Chen and Kim 2009).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of resistance and the role of some defense responses in wheat cultivars to Fusarium head blight

Khaledi¹,

Taheri²,

Falahati-Rastegar³

2018

Journal of Plant Protection Research

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Fusarium graminearum and F. culmorum are the causal agents of Fusarium head blight (FHB) in cereal crops worldwide. Application of resistant cultivars is the most effective and economic method for management of FHB and reducing mycotoxin production in wheat. Understanding the physiological and biochemical mechanisms involved in basal resistance of wheat to FHB disease is limited. In this research, after screening resistance levels of eighteen wheat cultivars planted in Iran, Gaskozhen and Falat were identified as partially resistant and susceptible wheat cultivars against Fusarium spp., respectively. Also, we investigated the role of hydroxyl radical (OH − ), nitric oxide (NO), callose deposition, lipid peroxidation and protein content in basal resistance of wheat to the hemi-biotrophic and necrotrophic Fusarium species causing FHB. Nitric oxide as a signaling molecule may be involved in physiological and defensive processes in plants. Our results showed that NO generation increased in seedlings and spikes of wheat cultivars after inoculation with Fusarium species. We observed earlier and stronger callose deposition at early time points after infection by Fusarium spp. isolates than in non-infected plants, which was positively related to the resistance levels in wheat cultivars. Higher levels of OH − and malondialdehyde (MDA) accumulation (as a marker of lipid peroxidation) were observed in the Falat than in the Gaskozhen cultivar, under non-infected and infected conditions. So, estimation of lipid peroxidation could be useful to evaluate cultivars' susceptibility. These findings can provide novel insights for better recognition of physiological and biochemical markers of FHB resistance, which could be used for rapid screening of resistance levels in wheat cultivars against this destructive fungal disease.

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Protection of strawberry plants (Fragaria ananassa Duch.) against anthracnose disease induced by Azospirillum brasilense

Cited by 50 publications

References 55 publications

Improved potato microclonal reproduction with the plant growth-promoting rhizobacteria Azospirillum

Improved potato microclonal reproduction with the plant growth-promoting rhizobacteria Azospirillum

Alleviation of Abiotic and Biotic Stresses in Plants by Azospirillum

Evaluation of resistance and the role of some defense responses in wheat cultivars to Fusarium head blight

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