Superoxide Dismutase and Stress Tolerance of Four Tomato Cultivars

Rahman, Syed Ajijur; Mackay, Wayne A.; Nawata, Eiji; Sakuratani, Tetsuo; Uddin, Akm Salah; Quebedeaux, Bruno

doi:10.21273/hortsci.39.5.983

Cited by 22 publications

(15 citation statements)

References 11 publications

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“…A decrease in total protein content in the leaves of tomato plants grown under water stress was also reported by Rahman et al (2002Rahman et al ( , 2004. These authors postulated that water stress reduces the synthesis of total protein, because of a possible suppression of the energy supply owing to reductions in photosynthesis and the overall adverse effects of the stress on the biochemical processes.…”

Section: Discussionsupporting

confidence: 57%

Effects of Different Levels of Water Stress on Leaf Water Potential, Stomatal Resistance, Protein and Chlorophyll Content and Certain Anti‐oxidative Enzymes in Tomato Plants

Zgallaï

Steppe

Lemeur

2006

JIPB

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A greenhouse experiment was performed in order to investigate the effects of different levels of water stress on leaf water potential (Ψ Ψ Ψ Ψ Ψ w ), stomatal resistance (r s ), protein content and chlorophyll (Chl) content of tomato plants (Lycopersicon esculentum Mill. cv. Nikita). Water stress was induced by adding polyethylene glycol (PEG 6 000) to the nutrient solution to reduce the osmotic potential (Ψ Ψ Ψ Ψ Ψ s ). We investigated the behavior of anti-oxidant enzymes, such as catalase (CAT) and superoxide dismutase (SOD), during the development of water stress. Moderate and severe water stress (i.e. Ψ Ψ Ψ Ψ Ψ s = -0.51 and -1.22 MPa, respectively) caused a decrease in Ψ Ψ Ψ Ψ Ψ w for all treated (water-stressed) plants compared with control plants, with the reduction being more pronounced for severely stressed plants. In addition, r s was significantly affected by the induced water stress and a decrease in leaf soluble proteins and Chl content was observed. Whereas CAT activity remained constant, SOD activity was increased in water-stressed plants compared with unstressed plants. These results indicate the possible role of SOD as an anti-oxidant protector system for plants under water stress conditions. Moreover, it suggests the possibility of using this enzyme as an additional screening criterion for detecting water stress in plants.

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Section: Discussionsupporting

confidence: 57%

Effects of Different Levels of Water Stress on Leaf Water Potential, Stomatal Resistance, Protein and Chlorophyll Content and Certain Anti‐oxidative Enzymes in Tomato Plants

Zgallaï

Steppe

Lemeur

2006

JIPB

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“…Saradhi et al (1995) reported that proline protects protein structure and membranes from damage and reduces enzyme denaturation; this would minimize damage caused by dehydration (Wang et al 1999). A decrease in protein content in tomato plants grown under water stress was reported by Rahman et al (2004). They postulated that water stress reduces the 17-18% 12-13% 7-8% Soil moisture GSH content (µg/g FW) Fig.…”

Section: Discussionmentioning

confidence: 68%

Effects of brassinolide on drought resistance of Xanthoceras sorbifolia seedlings under water stress

Feng

2010

Acta Physiol Plant

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We conducted pot experiments to investigate the effects of brassinolide on 1-year-old Xanthoceras sorbifolia B. seedlings. In the experiment, roots were soaked in 0-0.4 mg/l brassinolide. After the seedlings were established, the soil water content in the pots was regulated to simulate drought conditions and various physiological parameters were measured. The results showed that the treatment with 0.2 mg/l brassinolide decreased the malondialdehyde content and electrolyte leakage of seedlings growing under moderate or severe water stress when compared with untreated seedlings. Leaf water content, relative water content, soluble sugar content, soluble protein content, free proline content, ascorbic acid content, glutathione content and superoxide dismutase, peroxidase, catalase and ascorbate peroxidase activities were all greater in water-stressed seedlings in the 0.2 mg/l brassinolide treatment as compared to the control. The results indicate that the application of brassinolide can ameliorate the effects of water stress and enhance drought resistance of Xanthoceras sorbifolia seedlings.

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“…In addition, it also suggested that physiological adaptation of heat hardening enabled the plants to sustain temperature-induced damage at reproductive stages. Rahman et al (2004) also recorded a significant and positive relation between SCY and RCI only under heat stress conditions.…”

Section: Discussionmentioning

confidence: 87%

Hydrogen peroxide reduces heat‐induced yield losses in cotton (Gossypium hirsutum L.) by protecting cellular membrane damage

Sarwar

Saleem

Ullah

et al. 2017

J Agronomy Crop Science

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We investigated the effect of various growth substances such as hydrogen peroxide, salicylic acid (SA), moringa leaf-extract (MLE) and ascorbic acid (ASA) on leaf physiology and seed cotton yield (SCY) of heat-stressed cotton. Cotton plants were exposed to elevated temperatures at three reproductive stages, either by staggering planting time in the field or by increasing growth cabinet temperatures (38/24°C and 45/30°C) in glasshouse. Elevated temperature at any reproductive phase significantly damaged cellular membrane and reduced SCY. Plants exposed to 38/24°C and 45/30°C in glasshouse produced 63% and 22% lower SCY, respectively, compared with plants under optimal temperature ((32/20°C). In response to high temperature, cotton plants up-regulated activities of anti-oxidative enzymes e.g. peroxidase and ascorbic acid. However, this defensive system could not protect cellular membrane of stressed plants from extreme temperature (38 and 45°C). In contrast, growth substances such as H2O2, ASA and MLE significantly increased antioxidative enzymes activity to an extent, which reduced heat-induced damage to cellular membrane. No significant effect of any regulator was observed on SCY under optimum temperatures; although H2O2, MLE and ASA significantly increased SCY of heat-stressed cotton. Hydrogen peroxide increased SCY of April and May thermal regimes crops by 16% (averaged across both sowing dates) under field, while it caused 14% and 20% increase in SCY of plants exposed to sub (38/24°C) and supra optimal (45/30°C) thermal regimes under glasshouse. We concluded that growth regulators, specifically, H2O2 can protect cotton crops from heat-induced cellular membrane damage by up-regulating antioxidant defense system.

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Superoxide Dismutase and Stress Tolerance of Four Tomato Cultivars

Cited by 22 publications

References 11 publications

Effects of Different Levels of Water Stress on Leaf Water Potential, Stomatal Resistance, Protein and Chlorophyll Content and Certain Anti‐oxidative Enzymes in Tomato Plants

Effects of Different Levels of Water Stress on Leaf Water Potential, Stomatal Resistance, Protein and Chlorophyll Content and Certain Anti‐oxidative Enzymes in Tomato Plants

Effects of brassinolide on drought resistance of Xanthoceras sorbifolia seedlings under water stress

Hydrogen peroxide reduces heat‐induced yield losses in cotton (Gossypium hirsutum L.) by protecting cellular membrane damage

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