Influence of drought stress on the cellular ultrastructure and antioxidant system in leaves of drought-tolerant and drought-sensitive apple rootstocks

Wang, Sen; Liang, Dong; C, Li; Hao, Yanbin; Hu, Shu

doi:10.1016/j.plaphy.2011.10.014

Cited by 178 publications

(105 citation statements)

References 38 publications

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“…O aumento no consumo de O 2 observado em combinações incompatíveis se deve a um incremento do fl uxo de elétrons ao longo da via de respiração mitocondrial alternativa (NOCITO et al, 2010). Este comportamento tem sido amplamente relacionado a diferentes formas de estresses em tecidos vegetais e resulta em dano oxidativo secundário, devido ao acúmulo de espécies reativas de oxigênio (ROS), como o peróxido de hidrogênio (H 2 O 2 ) (CARNEIRO et al, 2012;WANG et al, 2012). As ROS têm potencial de interagir com muitos componentes celulares e a sua alta concentração gera estresse oxidativo, podendo levar à morte celular, que, quando ocorre, se caracteriza por necrose dos tecidos (GAO et al, 2008;MULLINEAUX & BAKER, 2010;IAKIMOVA et al, 2013), sintoma comum na região de união de combinações incompatíveis.…”

Section: Glicosídeos Cianogênicos (Gcs)unclassified

Incompatibilidade de enxertia em Prunus

et al. 2014

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Section: Glicosídeos Cianogênicos (Gcs)unclassified

Incompatibilidade de enxertia em Prunus

et al. 2014

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“…Resistance mechanism can be further classified into drought avoidance (via sustaining high tissue water potential by balancing of water uptake and loss, reducing stomata and leaf area, and increasing root/shoot ratios) and drought tolerance (via sustaining or conserving plant normal functions even at low tissue water potentials). This tolerance can be achieved through either dehydration avoidance (a mechanism that avoids leaf water loss at low tissue water potentials via solutes accumulation and cell wall hardening) or dehydration tolerance (a mechanism that avoids cellular damage caused by leaf water loss through accumulation of protective solutes and proteins, specific gene expression, metabolic changes and reactive oxygen species (ROS) detoxification) (Verslues et al 2006;Wang et al 2012). ROS including singlet oxygen ( 1 O 2 ), superoxide radical (O 2 -), hydrogen peroxide (H 2 O 2 ), and hydroxyl radical (HO -) are unavoidable byproducts of various metabolic pathways in plants (Noctor et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…ROS formation is induced by a wide range of environmental stresses including chilling (Jung 2004), temperature stress (Sung et al 2003), oxygen shortage (Blokhina et al 2003), salinity (Khan and Panda 2008), and drought (Bian and Jiang 2009). The generation of ROS in water deficit condition results from photosynthetic apparatus, photorespiration and respiration (Wang et al 2012). Overproduction of ROS could destroy normal metabolism of plants and cause damage to cellular structures through destructive oxidative processes such as peroxidation of membrane lipids, protein oxidation, degradation of photosynthetic pigments, inactivation of photosynthetic enzymes, and damage to nucleic acids (Gholami et al 2012;Silva et al 2012).…”

Section: Introductionmentioning

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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“…Plant species have different tolerances to drought stress (Wang et al, 2012). Adverse environmental conditions (such as drought) can cause oxidative stress when the over formation of free radicals such as superoxide anion (O 2 •−), hydroxyl radical (•OH), as well as non-radical molecules like hydrogen peroxide (H 2 O 2 ), the so-called reactive oxygen species (ROS) occur in the plants (Gill &Tute-ja, 2010).…”

Section: Methodsmentioning

confidence: 99%

Antioxidant and carbohydrate changes of two pomegranate cultivars under deficit irrigation stress

Ebtedaie

Shekafandeh

2017

Span. j. agric. res.

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The purpose of this study was to evaluate the biochemical responses to water stress tolerance of two pomegranate cultivars, 'Rabbab' and 'Shishehgap'. After the establishment of rooted stem cuttings of both cultivars under greenhouse conditions, they were treated with four levels of deficit irrigations (100%, 75%, 50% and 25% of field capacity) in a completely randomized design with four replications. The results showed a significant difference between the two cultivars regarding antioxidant enzymes activities. In both cultivars, the water stress increased the activity of superoxide dismutase, catalase and ascorbate peroxidase. However, at high water deficit (25% field capacity, FC), 'Rabbab' showed significantly higher enzyme activity than 'Shishehgap'. In each level of irrigation, there were not considerable differences in peroxidase activity between the two cultivars. An increment of 162% and 65.5% in soluble sugar was gained at 50% FC in 'Rabbab' and 'Shishehgap', respectively. 'Rabbab' showed better growth performance in each level of irrigation than 'Shishehgap'. Therefore, it can be concluded that 'Rabbab', with lesser decline in leaf relative water content (RWC), a strong antioxidant system and accumulation of more soluble carbohydrates, can resist higher water stress than 'Shishehgap'.Additional key words: field capacity; enzyme activity; Punica granatum L.; water stress. Abbreviation used: APX (ascorbate peroxidase); CAT (catalase); DW (dry weight); FC (field capacity); FW (fresh weight); NBT (nitro blue tetrazolium); POD (peroxidase); ROS (reactive oxygen species); RWC (leaf relative water content); SOD (superoxide dismutase).

show abstract

Influence of drought stress on the cellular ultrastructure and antioxidant system in leaves of drought-tolerant and drought-sensitive apple rootstocks

Cited by 178 publications

References 38 publications

Incompatibilidade de enxertia em Prunus

Incompatibilidade de enxertia em Prunus

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

Antioxidant and carbohydrate changes of two pomegranate cultivars under deficit irrigation stress

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