Effects of osmotic stress on antioxidant enzymes activities in leaf discs of PSAG12-IPT modified gerbera

Lai, Qixian; Bao, Zhenan; Zhu, Zhujun; Qian, Qiongqiu; Mao, Bizeng

doi:10.1631/jzus.2007.b0458

Cited by 53 publications

(34 citation statements)

References 31 publications

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“…These plants exhibited elevated antioxidant enzyme activity (Synkova et al 2006). Increased activity of SOD, CAT, APX, GPX and DHAR was responsible for the delay of osmotic stress-induced senescence in micropropagated transgenic gerbera plants (Lai et al 2007). …”

Section: Discussionmentioning

confidence: 99%

Study of the antioxidant enzymatic system during shoot development from cultured intercalar meristems of saffron

et al. 2011

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As preliminary research to develop a clonal in vitro propagation system for saffron, we have evaluated the morphogenic response of intercalary meristems present in shoots from sprouting saffron corms when cultured in media with different cytokinins. The best results in terms of shoot production and quality were achieved in the medium supplemented with 5 mg/l of benzylaminopurine (BAP). During the multiplication of the meristems, several changes in the activities of the antioxidant enzymatic system were detected. Catalase (CAT) activity was reduced in the presence of the assayed cytokinins, whereas peroxidase (POX) activity was stimulated with all the cytokinins assayed. When TDZ (thidizuron) was used, a slight decrease in superoxide dismutase (SOD) activity occurred, whereas BAP and 2iP (2-isopentenyl adenine) treatments produced a significant increase in SOD activity. The ascorbate-glutathione cycle enzymes showed a similar pattern in response to the addition of cytokinins. These results suggest a possible use of antioxidant enzyme activities as a parameter that could be use to evaluate the efficiency of micropropagation protocols for saffron and even in other species.

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Section: Discussionmentioning

confidence: 99%

Study of the antioxidant enzymatic system during shoot development from cultured intercalar meristems of saffron

et al. 2011

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“…Increases in activities of antioxidant enzymes were responsible for the delay of leaf senescence induced by osmotic stress in the AtSAG12 : IPT transgenic commercially important fl ower Gerbera jamesonii "Yuyan" (Lai et al 2007 ).…”

Section: Promoters That Drive Isopentenyl Transferase (Ipt) Gene Exprmentioning

confidence: 99%

Promoters for Transgenic Horticultural Plants

Smirnova

Tishchenko²,

Ermakov

et al. 2014

Abiotic Stress Biology in Horticultural Plants

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Gene engineering provides an opportunity to obtain plants with either silenced or overexpressed target genes. This approach is frequently used to study various aspects of the biochemistry, physiology, and stress tolerance of horticultural plants. Selection of appropriate promoters to govern transcription of a transgenic construct is an important step in the development of effi cient genetic models. Here we present a brief overview of available literature data on the promoters investigated with the transgenic horticultural plants and some valuable information resources in this fi led.

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“…Antioxidant enzymes, as a part of the detoxification system, are major components in plant defense mechanisms (Lai et al, 2007). In this study, it is clear that PAs induce all antioxidant enzyme activities in rolled leaves of both cultivars.…”

Section: Discussionmentioning

confidence: 66%

Exogenously applied polyamines ameliorate osmotic stress-induced damages and delay leaf rolling by improving the antioxidant system in maize genotypes

Caliskan¹,

Kadıoğlu²,

Güler³

2017

Turk J Biol

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IntroductionPlants under natural conditions frequently encounter various environmental stresses that have adverse effects on their growth and productivity (Gong et al., 2014). Leaf rolling (LR), particularly in crops, is a dehydration avoidance mechanism that results from water loss in plants under biotic and abiotic stress conditions. LR provides protection against damage resulting from excess radiation (Kadıoğlu and Terzi, 2007). On the other hand, delayed LR may be connected to the ability of plants to maintain plant cell turgor by enhancing water uptake or minimizing water loss despite drought stress (Kadıoğlu et al., 2012).LR is an important and necessary mechanism, protecting photosynthetic machinery and reducing yield loss as a result of drought stress in comparison with prevention of leaf rolling (PLR) (Nar et al., 2009;Sağlam et al., 2014). The relationship between delayed LR and drought resistance was previously recorded in Ctenanthe setosa plants exposed to drought stress (Kadıoğlu et al., 2011).Similar to other environmental stresses in higher plants, osmotic stress caused by drought may disturb the redox state homeostasis and cause oxidative stress (Smirnoff, 1993). Reactive oxygen species (ROS) cause several alterations, especially in protein degradation, enzyme

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Effects of osmotic stress on antioxidant enzymes activities in leaf discs of PSAG12-IPT modified gerbera

Cited by 53 publications

References 31 publications

Study of the antioxidant enzymatic system during shoot development from cultured intercalar meristems of saffron

Study of the antioxidant enzymatic system during shoot development from cultured intercalar meristems of saffron

Promoters for Transgenic Horticultural Plants

Exogenously applied polyamines ameliorate osmotic stress-induced damages and delay leaf rolling by improving the antioxidant system in maize genotypes

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