Differential responses of lipid peroxidation and antioxidants in the leaves of drought-tolerant P. acutifolius Gray and drought-sensitive P. vulgaris L. subjected to polyethylene glycol mediated water stress

Türkan, İsmail; Özdemir, Filiz; Koca, Hulusi

doi:10.1016/j.plantsci.2004.07.032

Cited by 461 publications

(276 citation statements)

References 55 publications

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“…Relatively lower values were seen in I. campanulata showing its tolerance to water stress. Levels of lipid peroxidation were observed to be lower in drought tolerant Phaseolous acutifolius than the drought sensitive species Phaseolous vulgaris (Turkan et al 2005). Similarly, drought tolerant invasive plant species Alternanthera philoxeroides depicted lower levels of lipid peroxidation than the sensitive crop plant Oryza sativa (Gao et al 2008).…”

Section: Discussionmentioning

confidence: 90%

Analysis of biochemical variations and microRNA expression in wild (Ipomoea campanulata) and cultivated (Jacquemontia pentantha) species exposed to in vivo water stress

Ghorecha

Patel

Ingle

et al. 2013

Physiol Mol Biol Plants

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The current study analyses few important biochemical parameters and microRNA expression in two closely related species (wild but tolerant Ipomoea campanulata L. and cultivated but sensitive Jacquemontia pentantha Jacq.G.Don) exposed to water deficit conditions naturally occurring in the field. Under soil water deficit, both the species showed reduction in their leaf area and SLA as compared to well-watered condition. A greater decrease in chlorophyll was noticed in J. pentantha (~50 %) as compared to I. campanulata (20 %) under stress. By contrast, anthocyanin and MDA accumulation was greater in J. pentantha as compared to I. campanulata . Multiple isoforms of superoxide dismutases (SODs) with differing activities were observed under stress in these two plant species. CuZnSOD isoforms showed comparatively higher induction (~10-40 %) in I. campanulata than J. pentantha . MicroRNAs, miR398, miR319, miR395 miR172, and miR408 showed opposing expression under water deficit in these two plant species. Expression of miR156, miR168, miR171, miR172, miR393, miR319, miR396, miR397 and miR408 from either I. campanulata or J. pentantha or both demonstrated opposite pattern of expression to that of drought stressed Arabidopsis. The better tolerance of the wild species (I. campanulata) to water deficit could be attributed to lesser variations in chlorophyll and anthocyanin levels; and relatively higher levels of SODs than J. pentantha. miRNA expression was different in I. campanulata than J. pentantha.

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Section: Discussionmentioning

confidence: 90%

Analysis of biochemical variations and microRNA expression in wild (Ipomoea campanulata) and cultivated (Jacquemontia pentantha) species exposed to in vivo water stress

Ghorecha

Patel

Ingle

et al. 2013

Physiol Mol Biol Plants

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“…Reports on antioxidant enzyme activities under water deficit conditions are heterogeneous. Levels of these antioxidants have been shown to differentially alter, that is, they may be increased, remain unchanged or even decreased (Abedi and Pakniyat 2010;Chakraborty and Pradhan 2012;Gholami et al 2012;Liu et al 2011;Slabbert and Krüger 2014;Sun et al 2013;Türkan et al 2005). The study of expression patterns of genes encoding antioxidant enzymes could be valuable for understanding molecular adaptation of plant to drought stress conditions.…”

Section: Discussionmentioning

confidence: 99%

Responses of pomegranate cultivars to severe water stress and recovery: changes on antioxidant enzyme activities, gene expression patterns and water stress responsive metabolites

Pourghayoumi

Rahemi

Bakhshi

et al. 2017

Physiol Mol Biol Plants

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The biochemical and molecular responses of five commercially well-known pomegranate cultivars to severe water stress were studied. The cultivars were subjected to 14-day water stress by withholding irrigation, followed by re-watering for 7 days. Results showed clear differences in metabolites contents and activities of antioxidant enzymes among various pomegranate cultivars during severe water stress and recovery. According to our results, increased accumulation of proline in pomegranate was not related to osmotic adjustment during severe water stress. Except for 'Ghojagh', leaves grown under severe water stress conditions showed symptoms of oxidative stress such as reduced chlorophyll concentration. The improved performance of 'Ghojagh' under drought stress may be associated with an efficient osmotic adjustment. The up-or down regulated expression of cytosolic glutathione reductase (cytosolic GR) and glutathione peroxidase were observed under drought conditions. Moreover, the suppressed expression of cytosolic GR was also noted. Comparatively, 'Rabab' exhibited higher antioxidant capacity and an efficient ROSscavenging mechanism under drought stress. Lower levels of membrane lipid peroxidation in 'Ghojagh' and 'Rabab' under drought stress and the marked reduction of malondialdehyde concentration after re-watering represents that these cultivars have a good tolerance to drought stress. As a first step towards the study of the biochemical and molecular responses of pomegranate plants to water stress, this research provides new information into the mechanisms of drought tolerance in the plants.

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“…As concentrações de PEG 6000 (0; 188,35; 267,75 e 357,24 g/L foram obtidas de acordo com a tabela citada por Villela et al (1991). O PEG foi escolhido pelo grande número de estudos que tem utilizado este composto para simulação de estresse hídrico e por ser um polímero não iônico, de longa cadeia, inerte e não absorvido pelas raízes (Türkan et al, 2005). Durante a germinação, foi calculado o índice de velocidade de germinação (IVG) que foi obtido, diariamente, por meio da fórmula:…”

Section: Materials Vegetalunclassified

Influência da sanidade e deficit hídrico na germinação de sementes de Carthamus tinctorius L.

Dantas¹,

Silva²,

Pereira³

et al. 2011

Rev. bras. sementes

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A salinidade e o déficit hídrico são os fatores abióticos que têm afetado acentuadamente a produção de espécies vegetais de importância socioeconômica nas regiões áridas e semi-áridas. Portanto, o objetivo do presente trabalho foi de avaliar os efeitos do cloreto de sódio (NaCl) e do polietilenoglicol (PEG 6000), agentes estressores comumente utilizados para simular os estresses salino e hídrico, respectivamente, na germinação de sementes de cártamo (Carthamus tinctorius L.), uma oleaginosa da família Asteraceae. A germinação foi conduzida em sistema de rolo, com delineamento experimental de sete tratamentos osmóticos (controle; "0,450; "0,852; "1,271 MPa), sendo três com concentrações isosmóticas de NaCl (100; 200 e 300mM) e PEG (188,35; 267,75 e 357,24 g/L), e cada tratamento com seis repetições. Durante a germinação, foram avaliados parâmetros como a porcentagem de germinação, o índice de velocidade de germinação (IVG), e três dias após o semeio, foram registrados o índice de crescimento relativo da radícula (ICRR) e a massa fresca dos eixos das plântulas. A porcentagem de germinação e o IVG não sofreram alterações significativas no tratamento osmótico de "0,450 MPa induzido por NaCl quando comparado com o controle, enquanto no mesmo tratamento, induzido pelo PEG, estes dois parâmetros apresentaram uma intensa diminuição e um leve aumento, respectivamente. O ICRR e a massa das plântulas apresentaram diminuições proporcionais à redução do potencial osmótico ao utilizar ambos os compostos. Com base nos resultados alcançados, pôde-se concluir que a germinação de sementes de cártamo é influenciada pelo tipo de estresse aplicado e sua respectiva dose. Adicionalmente, o estresse osmótico induzido por PEG 6000 é mais agressivo que o salino, e potenciais osmóticos mais baixos ("0,851 e "1,271 MPa) são limitantes para a germinação desta espécie.

show abstract

Differential responses of lipid peroxidation and antioxidants in the leaves of drought-tolerant P. acutifolius Gray and drought-sensitive P. vulgaris L. subjected to polyethylene glycol mediated water stress

Cited by 461 publications

References 55 publications

Analysis of biochemical variations and microRNA expression in wild (Ipomoea campanulata) and cultivated (Jacquemontia pentantha) species exposed to in vivo water stress

Analysis of biochemical variations and microRNA expression in wild (Ipomoea campanulata) and cultivated (Jacquemontia pentantha) species exposed to in vivo water stress

Responses of pomegranate cultivars to severe water stress and recovery: changes on antioxidant enzyme activities, gene expression patterns and water stress responsive metabolites

Influência da sanidade e deficit hídrico na germinação de sementes de Carthamus tinctorius L.

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