Chill-induced changes in fatty acid composition of tonoplast vesicles from hypocotyls of Vigna unguiculata (L.) Walp.

Oliveira, Luciana Maia Nogueira de; Sobreira, Alana Cecília de Menezes; Monteiro, Fernando de P.; Melo, Dirce Fernandes de

doi:10.1590/s1677-04202010000100008

Cited by 6 publications

(8 citation statements)

References 24 publications

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“…However, in 38°C condition, we observed low electrolytic leakage, consistent with the decrease in linolenic and linoleic. Rydlová et al (2011), also observed similar results in the association of flex plants with plant growth promoting Glomus species, while Oliveira et al (2010) found same results under chilling stress. Similar results have been observed in other species (Murakami et al 2000;Grover et al 2000;Guerzoni et al 2001;Falcone et al 2004).…”

Section: Discussionsupporting

confidence: 58%

“…Lipids are considered the main chemical component of biological membranes, which plays an important role in cellular permeability, fluidity, and membrane-bound enzyme activities. The structural and functional stability of membrane is essential for plant resistance to temperature stresses, whilst damage in membrane structure can affect the permeability and membrane-localized enzymes Ruelland and Zachowski 2010;Oliveira et al 2010). Lipid peroxidation serves as an indicator for oxidative stress.…”

Section: Introductionmentioning

confidence: 99%

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Mutualistic association of Paecilomyces formosus LHL10 offers thermotolerance to Cucumis sativus

Khan

Hamayun

Radhakrishnan

et al. 2011

Antonie van Leeuwenhoek

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We investigated in this study the influence of an endophytic fungus, Paecilomyces formosus LHL10, on the thermotolerance of cucumber (Cucumis sativus) upon exposure to high (38°C) and low (8°C) temperature stresses. The results showed that endophyte-inoculated plants had significantly higher plant growth attributes under high-temperature stress. However, they were either low or insignificant in non-inoculated control and inoculated plants with 8°C treatments. Lower stress-promulgated water deficit and cellular membrane damage were observed in endophyte-treated plants after 38°C treatment than in control plants under 8°C stress. Total polyphenol, reduced glutathione, and lipid peroxidation activities were reduced in endophyte-associated plants after exposure to 38°C as compared with control and 8°C-treated plants. The concentration of saturated fatty acids (palmitic-C16:0; stearic-C18:0) was lower in endophyte-treated plants with or without low-temperature stress, but after 8°C treatment increased compared with controls. Unsaturated fatty acids (oleic-C18:1; linoleic-C18:2; linolenic-C18:3 acids) were similar at normal conditions; however, at 38°C, C18:2 and C18:3 were decreased, and C18:1 was increased in endophyte-treated plants compared with controls, while the inverse relationship was found at 8°C. Low levels of abscisic acid in P. formosus-associated plants after 38°C treatments revealed stress tolerance compared with control and 8°C-treated plants. In contrast, salicylic acid was pronounced in endophyte-treated plants after low-temperature stress as compared to other treatments. The results provide evidence that the response to P. formosus association was beneficial at normal growth temperature and had varying effects in response to temperature stress.

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Section: Discussionsupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Mutualistic association of Paecilomyces formosus LHL10 offers thermotolerance to Cucumis sativus

Khan

Hamayun

Radhakrishnan

et al. 2011

Antonie van Leeuwenhoek

View full text Add to dashboard Cite

show abstract

“…A similar effect was observed in V. radiata (L.) Wilczek and Vigna unguiculata (L.) Walp. seedlings (Posmyk and Janas, 2007;Oliveira et al, 2010). However, in our study, this effect was reversible after 2 days of re-warming, especially in H-MEL roots, where H-MEL treatment caused a 20% increase in root length relative to C treatment (Table 1).…”

Section: Resultscontrasting

confidence: 49%

Changes in the nature of phenolic deposits after re-warming as a result of melatonin pre-sowing treatment of Vigna radiata seeds

Szafrańska

Glińska

Janas

2012

Journal of Plant Physiology

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“…These scavengers stabilizes subcellular structures and buffers cellular redox potential under stress conditions (Wahid et al 2007;Zinn et al 2010), while their activity depends on the level of stress perception by plants. The structural and functional stability of membrane is essential for plant's resistance to temperature stress, while damage in membrane structure can affect the permeability and the activity of membrane-localized enzymes Ruelland and Zachowski 2010;Oliveira et al 2010). Since membrane bounded lipid hydroperoxides are difficult to measure due to their instability, we often rely on the degree of lipid peroxidation by quantifying the secondary breakdown products like MDA.…”

Section: Introductionmentioning

confidence: 99%

Exophiala sp.LHL08 association gives heat stress tolerance by avoiding oxidative damage to cucumber plants

et al. 2011

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Exophiala sp. LHL08, a gibberellin-producing strain, was investigated to assess its effects on cucumber plant growth and heat (40°C) stress tolerance. The results reveal that Exophiala sp. associated plants had significantly higher plant growth attributes (shoot length, plant biomass, chlorophyll contents, and leaf area) than control under heat stress. Endophytic association helped the plants to obtain adequate water to reduce the leaf electrolytic leakage under stress. High-temperature-induced oxidative stress was less pronounced in Exophiala sp. associated plants as shown by enhanced levels of total polyphenol and reduced activities of glutathione, superoxide anion, and lipid peroxidation. To tolerate heat stress and rescue plant growth, the endophyte association significantly increased catalase and peroxidase activities of the host plants as compared to control plants. Contents of palmitic, stearic, oleic, and α-linolenic were significantly decreased in the Exophiala sp.-inoculated plants than control plants under heat stress. Contents of flavonoids like genistein and daidzein were produced in higher quantities, while glycitein content was almost same in endophyte-associated plants under heat stress than control plants. Contrarily, stress-responsive endogenous abscisic acid and jasmonic acid were significantly activated in noninoculated control treatments as compared to endophyteinoculated plants under heat stress. The findings of the study reveal that association of Exophiala sp. with cucumber host plants can modulate heat stress by influencing physiological and biochemical contents of plants under heat stress.

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Chill-induced changes in fatty acid composition of tonoplast vesicles from hypocotyls of Vigna unguiculata (L.) Walp.

Cited by 6 publications

References 24 publications

Mutualistic association of Paecilomyces formosus LHL10 offers thermotolerance to Cucumis sativus

Mutualistic association of Paecilomyces formosus LHL10 offers thermotolerance to Cucumis sativus

Changes in the nature of phenolic deposits after re-warming as a result of melatonin pre-sowing treatment of Vigna radiata seeds

Exophiala sp.LHL08 association gives heat stress tolerance by avoiding oxidative damage to cucumber plants

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