Endogenous Salicylic Acid Levels and Signaling Positively Regulate Arabidopsis Response to Polyethylene Glycol-Simulated Drought Stress

He, Qingqing; Zhao, Shiyang; Ma, Qiushuang; Zhang, Yiyan; Huang, Linli; Li, Guangzhe; Lin, Haoran

doi:10.1007/s00344-014-9438-9

Cited by 42 publications

(19 citation statements)

References 52 publications

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“…In contrast, the ABA and SA content increased markedly at four days DS and then decreased rapidly at eight days DS and recovery irrigation. Similar changes in ABA and SA content under DS were also observed in bluegrass (Poa annua L.), poplar (Populus × canadensis Moench) and Arabidopsis thaliana (Jing et al, 2014;He et al, 2014;Yu and Ma, 2014), while research on these hormones in response to rewatering is still limited. Our results were consistent with previous studies (Upadhyaya and Panda, 2004;Liu et al, 2010;Netto et al, 2010), which indicated that the response of tea plants to DS was severely affected by DS intensity and duration.…”

Section: Discussionmentioning

confidence: 52%

Physiological changes and differential gene expression of tea plant under dehydration and rehydration conditions

Liu

Yao

et al. 2015

Scientia Horticulturae

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Section: Discussionmentioning

confidence: 52%

Physiological changes and differential gene expression of tea plant under dehydration and rehydration conditions

Liu

Yao

et al. 2015

Scientia Horticulturae

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“…In sunflower plants subjected to different osmotic potentials, there was an increase in CAT activity due to increased water restriction (BALOĞLU et al, 2012). The opposite was observed in rice (SHARMA; DUBEY, 2005) and thale cress (Arabidopsis thaliana) (HE et al, 2014), where CAT activity decreased with increased water stress.…”

Section: Figure 2 Seedling Height -Sh (A C and E) Total Dry Phytommentioning

confidence: 88%

Genotypic Variation on the Antioxidative Response of Cowpeacultivars Exposed to Osmotic Stress

et al. 2017

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-The cowpea [Vigna unguiculata (L.) Walp.], also known as cowpea, is of fundamental socioeconomic importance to the northeast of Brazil, and has become one of the main sources of protein in the diet of the rural population. However, in this region, it has become necessary to identify genotypes that are better adapted to drought. In addition, research is needed regarding the action of substances that promote tolerance to stress factors. The aim of this study was to evaluate the antioxidative response of cowpea cultivars under osmotic stress conditions using potassium nitrate as an attenuator. Five osmotic potentials were tested in the substrate (0.0, −0.2, −0.4, −0.6, and −0.8 MPa), and three seed treatments (pre-soaking in distilled water, pre-soaking in potassium nitrate, and without pre-soaking) were tested in three cowpea cultivars (BRS Itaim, BRS Aracê, and BRS Potengi). The design was randomized with 45 treatments and four replications. The data were submitted to analysis of variance (P < 0.05), and in cases of significance, regression analysis was conducted to quantitate the factors. Our results indicate that an increase in proline content in cowpea plants may be seen as indicative of the intensity of water stress on germination and the initial stages of growth of the plant. The BRS Itaim cultivar best tolerates drought conditions with the application of potassium nitrate, given the increased activity of antioxidant enzymes such as superoxide dismutase, catalase, and ascorbate peroxidase.Keywords: Vigna unguiculata. Enzymes. Catalase. Hydrical stress. VARIAÇÃO GENOTÍPICA NA RESPOSTA ANTIOXIDATIVA DE CULTIVARES DE FEIJÃO-CAUPI EXPOSTOS AO ESTRESSE OSMÓTICORESUMO -O feijão-caupi [Vigna unguiculata (L.) Walp.], também conhecido como feijão macassar, representa fundamental importância socioeconômica para o Nordeste do Brasil, constituindo-se como uma das principais fontes proteicas na alimentação da população rural. Todavia, nessa região é necessário identificar genótipos mais adaptados ao déficit hídrico, bem como conhecer a ação de substâncias promotoras de tolerância a fatores de estresse. O objetivo desse trabalho foi avaliar a resposta antioxidativa de cultivares feijão-caupi sob condições de estresse osmótico, utilizando como atenuador o nitrato de potássio. Foram testados cinco potenciais osmóticos no substrato (0,0; -0,2; -0,4; -0,6 e -0,8 MPa) e três tratamentos de sementes (pré-embebição em água destilada; pré-embebição em nitrato de potássio e sem pré-embebição) em três cultivares (BRS Itaim, BRS Aracê e BRS Potengi). Foi adotado o delineamento inteiramente casualizado, com quatro repetições e sementes por repetição. Os dados obtidos foram submetidos à análise de variância (P<0,05) e nos casos de significância foi realizada a análise de regressão para fator de natureza quantitativa. Os resultados indicam que um aumento no teor de prolina em feijão-caupi pode ser visto como indicativo da intensidade do estresse hídrico na germinação e nos estágios iniciais de crescimento da planta. A cultiv...

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“…Hydrogen peroxide (H 2 O 2 ) content was quantified as described by He et al. (). The level of lipid peroxidation was analysed by assaying the malondialdehyde (MDA) production according to the description by Xu et al.…”

Section: Methodsmentioning

confidence: 99%

“…(). The extraction and analysis of superoxide dismutase (SOD; EC 1.15.1.1) and peroxidase (POD; EC 1.11.1.7) were performed in accordance with an early report (He et al., ). In the preparation of various extracts, the necrotic tissues were excluded from the tested leaves.…”

Section: Methodsmentioning

confidence: 99%

Arbuscular mycorrhiza‐mediated resistance in tomato against Cladosporium fulvum‐induced mould disease

Wang

Yin

et al. 2017

Journal of Phytopathology

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Root colonization with arbuscular mycorrhizal fungi (AMF) enhances plant resistance particularly against soil-borne pathogenic fungi. In this study, mycorrhizal inoculation with Glomus mosseae (Gm) significantly alleviated tomato mould disease caused by the air-borne fungal pathogen, Cladosporium fulvum (Cf). The disease index (DI) in local leaves (receiving pathogen inoculation) and systemic leaves (just above the local leaf without pathogen inoculation) was 36.4% and 11.7% in mycorrhizal plants, respectively, whereas DI was 59.6% and 36.4% in the corresponding leaves of AMF noninoculated plants, after 50 days of Gm inoculation, corresponding to 15 days after Cf inoculation by leaf infiltration. Foliar spray inoculation with Cf also revealed that AMF pre-inoculated plants had a higher resistance against subsequent pathogen infection, where the DI was 41.3% in mycorrhizal plants vs. 64.4% in AMF non-inoculated plants.AMF-inoculated plants showed significantly higher fresh and dry weight than noninoculated plants under both control (without pathogen) and pathogen treatments.AMF-inoculated plants exhibited significant increases in activities of superoxide dismutase and peroxidase, along with decreases in levels of H 2 O 2 and malondialdehyde, compared with non-inoculated plants after pathogen inoculation. AMF inoculation led to increases in total chlorophyll contents and net photosynthesis rate as compared with non-inoculated plants under control and pathogen infection. Pathogen infection on AMF non-inoculated plants led to decreases in chlorophyll fluorescence parameters. However, pathogen infection did not affect these parameters in mycorrhizal plants. Taken together, these results indicate that AMF colonization may play an important role in plant resistance against air-borne pathogen infection by maintaining redox poise and photosynthetic activity. K E Y W O R D Santioxidative defence, arbuscular mycorrhiza, Cladosporium fulvum, disease index, Glomus mosseae, photosynthesis, tomato | INTRODUCTIONThe biotrophic pathogen fungus Cladosporium fulvum Cooke infects its only host tomato causing leaf mould disease, which is one of the most severe diseases threatening tomato yield and quality, especially in protected cultivation. For example, a yield loss of 10%-25% in normal years and even over 50% in bad years occurred in China (Sun, 2006). In conventional agricultural management, a large amount of synthetic fungicide is applied to control mould disease, which could cause serious environmental contamination and harm human health.In addition, new races of C. fulvum frequently emerge raising a problem of fungicide tolerance.*These authors contributed equally to this work. Control plants were sprayed with sterile distilled water. | MATERIALS AND METHODS | Plant culture and fungal treatment | Analyses of disease index and mycorrhizal colonizationThe DI was analysed after 15 days of pathogen inoculation accord- | Determination of plant growthThe effect of AMF colonization, pathogen infection, alone or in combinat...

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Endogenous Salicylic Acid Levels and Signaling Positively Regulate Arabidopsis Response to Polyethylene Glycol-Simulated Drought Stress

Cited by 42 publications

References 52 publications

Physiological changes and differential gene expression of tea plant under dehydration and rehydration conditions

Physiological changes and differential gene expression of tea plant under dehydration and rehydration conditions

Genotypic Variation on the Antioxidative Response of Cowpeacultivars Exposed to Osmotic Stress

Arbuscular mycorrhiza‐mediated resistance in tomato against Cladosporium fulvum‐induced mould disease

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