Increased abscisic acid levels in transgenic tobacco over‐expressing 9 cis‐epoxycarotenoid dioxygenase influence H2O2 and NO production and antioxidant defences

Zhang, Yiming; Tan, Jiali; Guo, Zhenfei; Lu, Shengyong; He, Sijian; Shu, Wei; Zhou, Biyan

doi:10.1111/j.1365-3040.2009.01945.x

Cited by 132 publications

(80 citation statements)

References 38 publications

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“…On the other hand Put has been found to serve as a modulator of indispensable ABA increase under cold stress thus representing and reciprocal relationship between Put and ABA biosynthesis during the period of stress in order to increase plant adaptive potential (Cuevas et al, 2008(Cuevas et al, , 2009Urano et al, 2009). The transgenic tobacco plants overexpressing the ABA-biosynthetic enzyme 9-cis-epoxycarotenoid dioxygenase is associated with the ABAinduced production of H 2 O 2 , NO, and the subsequent induction of antioxidant enzymes conferring salt tolerance (Zhang et al, 2009). Recently, it has been shown that polyamines can induce the production of NO that serves as a signal-inducing salt resistance by increasing the K + to Na + ratio by stimulating the expression of the plasma membrane H + -ATPase and Na+/H+ antiport in the tonoplast (Zhao et al, 2004;Tun et al, 2006;Yamasaki and Cohen, 2006;Zhang et al, 2006).…”

Section: Polyamines As Modulators Of Ion Homeostasismentioning

confidence: 99%

Polyamines as redox homeostasis regulators during salt stress in plants

Saha

Brauer

Sengupta

et al. 2015

Front. Environ. Sci.

173

105

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The balance between accumulation of stress-induced polyamines and reactive oxygen species (ROS) is arguably a critical factor in plant tolerance to salt stress. Polyamines are compounds, which accumulate in plants under salt stress and help maintain cellular ROS homeostasis. In this review we first outline the role of polyamines in mediating salt stress responses through their modulation of redox homeostasis. The two proposed roles of polyamines in regulating ROS-as antioxidative molecules and source of ROS synthesis-are discussed and exemplified with recent studies. Second, the proposed function of polyamines as modulators of ion transport is discussed in the context of plant salt stress. Finally, we highlight the apparent connection between polyamine accumulation and programmed cell death induction during stress. Thus, polyamines have a complex functional role in regulating cellular signaling and metabolism during stress. By focusing future efforts on how polyamine accumulation and turnover is regulated, research in this area may provide novel targets for developing stress tolerance.

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Section: Polyamines As Modulators Of Ion Homeostasismentioning

confidence: 99%

Polyamines as redox homeostasis regulators during salt stress in plants

Saha

Brauer

Sengupta

et al. 2015

Front. Environ. Sci.

173

105

View full text Add to dashboard Cite

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“…The activation of stress signalling pathways begins with stress perception, followed by the generation of secondary signalling molecules, and the induction or activation of transcription factors that regulate the expression of multiple downstream target genes (Bartels and Sunkar 2005). Various studies have shown that the phytohormone ABA, produced in plants under stress conditions, plays a major role in stress signalling and that overexpression of ABA biosynthetic genes in transgenic plants can confer improved drought and salt tolerance (Iuchi et al 2001;Zhang et al 2009). In addition, the superinduction of stress-responsive gene transcription observed in the Arabidopsis fry1 mutant (Xiong et al 2001) suggests an important role for inositol 1, 4, 5-triphosphate (IP 3 ) as a secondary signalling molecule.…”

Section: Introductionmentioning

confidence: 99%

Regulation of multiple aquaporin genes in Arabidopsis by a pair of recently duplicated DREB transcription factors

Rae

Lao

Kavanagh

2011

Planta

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Identifying the transcription factors that mediate responses to abiotic stress is of fundamental importance in plant biology, not least because of their potential utility in crop improvement. The recently duplicated genes RAP2.4B and RAP2.4 encode transcription factors belonging to the abiotic stress-associated DREB A-6 clade in Arabidopsis thaliana. Both proteins localise exclusively to nuclei and show similar DRE-element-binding characteristics. Expression analysis of stressed and non-stressed plants revealed partially overlapping expression patterns. Both genes were highly expressed in stems and roots and were differentially induced in response to cold, dehydration and osmotic stress. RAP2.4B, however, was uniquely expressed at a high level in dry seeds and was induced by heat stress, while RAP2.4 was uniquely induced at a high level by salt stress. Microarray-based transcriptional profiling of double knockout and overexpression lines revealed altered expression of genes associated with adaptation to drought stress. Most strikingly, six aquaporin genes, five of which are members of a recently identified co-expression network, were downregulated in the double knockout line and correspondingly upregulated in the overexpression line, suggesting that these DREBs play a role in the regulation of water homeostasis.

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“…This expression pattern for such genes is due to their role in catalyzing the reduction of H2O2 to water (Zou et al, 2005;Verslues et al, 2007;Zhang et al, 2009;Zhou et al, 2014). This result was confirmed by Lei et al (2008) who found that nanoparticles reduced antioxidant stress by reducing H2O2 and increasing enzymes such as APX, resulting in improved seed germination in some plant species.…”

Section: Figmentioning

confidence: 67%

Influence of Silver Nano-particles on the Salt Resistance of Tomato (Solanum lycopersicum) during Germination

Almutairi

2016

IJAB

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To cite this paper: Almutairi, Z.M., 2016. Influence of silver nano-particles on the salt resistance of tomato (Solanum lycopersicum) during germination. AbstractSilver nanoparticles (AgNPs) have been implicated to enhance seed germination and plant growth, improve photosynthetic quantum efficiency and act as antimicrobial agents to manage plant diseases. The role of nanoparticles in the improvement of plant tolerance to environmental stresses such as drought and salinity remains unclear. In this study, we examined the effects of AgNP dose on the salt tolerance of tomato (Solanum lycopersicum L.) plants during germination. Tomato seeds were treated with different AgNP doses and germinated under salinity stress. Five concentrations of AgNPs (0.05, 0.5, 1.5, 2 and 2.5 mg L -1 ) and two levels of NaCl (150 and 100 mM) were tested. Seed germination and seedling growth of tomato plants were markedly inhibited by salt stress, and this effect was alleviated by exposure to AgNPs. The germination percentage, germination rate, root length and seedling fresh and dry weight of tomato were improved after exposure to AgNPs under NaCl stress. The expression of salt stress genes was investigated by semi-quantitative RT-PCR. Of the examined salt stress genes, four genes, AREB, MAPK2, P5CS and CRK1, were up-regulated by AgNPs under salt stress, and three genes, TAS14, DDF2 and ZFHD1, were down-regulated in response to AgNPs. The gene expression patterns associated with AgNP exposure also suggest the potential involvement of AgNPs in response to stress, indicating that they might be useful for improving plant tolerance to salinity.

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Increased abscisic acid levels in transgenic tobacco over‐expressing 9 cis‐epoxycarotenoid dioxygenase influence H₂O₂ and NO production and antioxidant defences

Abstract: ABSTRACT

Cited by 132 publications

References 38 publications

Polyamines as redox homeostasis regulators during salt stress in plants

Polyamines as redox homeostasis regulators during salt stress in plants

Regulation of multiple aquaporin genes in Arabidopsis by a pair of recently duplicated DREB transcription factors

Influence of Silver Nano-particles on the Salt Resistance of Tomato (Solanum lycopersicum) during Germination

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