Effects of abiotic stress on plants: a systems biology perspective

Cramer, Grant R.; Urano, Kaoru; Delrot, Serge; Pezzotti, Mario; Shinozaki, Kazuo

doi:10.1186/1471-2229-11-163

Cited by 1,140 publications

(707 citation statements)

References 135 publications

(178 reference statements)

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“…It also represents a model species for functional genomics studies of temperature stress tolerance in crops. For rice seedlings, low temperature in early spring is one of the major environmental factors limiting growth and agricultural production (Chinnusamy et al, 2007;Su et al, 2010;Cramer et al, 2011); thus, it is important to reveal the molecular mechanisms of the cold responses in rice for the genetic improvement of cold tolerance.…”

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confidence: 99%

The OsMYB30 Transcription Factor Suppresses Cold Tolerance by Interacting with a JAZ Protein and Suppressing β-Amylase Expression

et al. 2017

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Cold stress is one of the major limiting factors for rice (Oryza sativa) productivity. Several MYB transcriptional factors have been reported as important regulators in the cold stress response, but the molecular mechanisms are largely unknown. In this study, we characterized a cold-responsive R2R3-type MYB gene, OsMYB30, for its regulatory function in cold tolerance in rice. Functional analysis revealed that overexpression of OsMYB30 in rice resulted in increased cold sensitivity, while the osmyb30 knockout mutant showed increased cold tolerance. Microarray and quantitative real-time polymerase chain reaction analyses revealed that a few b-amylase (BMY) genes were down-regulated by OsMYB30. The BMY activity and maltose content, which were decreased and increased in the OsMYB30 overexpression and osmyb30 knockout mutant, respectively, were correlated with the expression patterns of the BMY genes. OsMYB30 was shown to bind to the promoters of the BMY genes. These results suggested that OsMYB30 exhibited a regulatory effect on the breakdown of starch through the regulation of the BMY genes. In addition, application of maltose had a protective effect for cell membranes under cold stress conditions. Furthermore, we identified an OsMYB30-interacting protein, OsJAZ9, that had a significant effect in suppressing the transcriptional activation of OsMYB30 and in the repression of BMY genes mediated by OsMYB30. These results together suggested that OsMYB30 might be a novel regulator of cold tolerance through the negative regulation of the BMY genes by interacting with OsJAZ9 to fine-tune the starch breakdown and the content of maltose, which might contribute to the cold tolerance as a compatible solute.

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The OsMYB30 Transcription Factor Suppresses Cold Tolerance by Interacting with a JAZ Protein and Suppressing β-Amylase Expression

et al. 2017

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“…Therefore, the induction of ERF genes under anoxia observed in this work is attributed to other signalling molecules. Among the potential signals for ERF induction, there are reactive oxygen species (ROS) ) formed under anoxia conditions (Cramer et al 2011). The repression of a large number of ERF can be associated with the inhibition of ethylene production under these conditions.…”

Section: Discussionmentioning

confidence: 99%

Ethylene response factors gene regulation and expression profiles under different stresses in rice

Pegoraro¹,

Farias²,

Mertz³

et al. 2013

Theor. Exp. Plant Physiol.

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Stresses can cause large yield reductions in cultivated plants. The response to these stresses occurs via a plethora of signalling pathways, where a large number of genes is induced or repressed. Among the environmental stress responsive genes, there are the members of the ethylene response factors (ERF) gene family. The mRNA levels of different ERF are regulated by many hormones and molecules produced under different stress conditions. In this study, with the goal of identifying the response of rice ERF genes to environmental stress, it was analysed the transcriptional expression profile of 114 of these genes under stress by anoxia, salt and Magnaporthe grisea.Also, aiming to characterize how the regulation of ERF genes occurs, the amount of known cis regulatory elements in the promoter region of these genes and their association with the expression profiles under the tested conditions were also assessed. The results indicate that some ERF members present the same specific expression profiles under different environmental stresses, while others do not. Within the ERF family, the regulation of gene expression is complex for some genes which have many cis elements in their promoters, but simple for others, demonstrating high levels of divergence among them. The findings demonstrate the importance of the study of each ERF separately, since it is not possible to establish general rules for regulation and probably for the function of these genes.

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“…The presence of a stressful factor generates genetic and epigenetic changes, especially modification at the gene expression level and as a result morphological, anatomical and physiological responses usually occur (Cramer et al, 2011). One of the first such events happening at the cellular level is generation of reactive oxygen species (ROS), which alter gene expression and enzyme activity.…”

Section: Introductionmentioning

confidence: 99%

In Vitro Culture as a Stressful Factor Triggers Changes in Polyphenols, Flavonoids and Antioxidant Activity in Somatic Hybrids between Solanum tuberosum and S. bulbocastanum and their Respective Parents

Cruceriu

Molnár

Diaconeasa

et al. 2017

Not Bot Horti Agrobo

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Phenols, important secondary metabolites in plants, are responsible for specific defence mechanisms against abiotic stress, due to their strong antioxidant activity. Flavonoids, as part of phenolic group, are also involved in plant stress responses, being primarily responsible for photo-protection against UV solar radiation. Based on these premises, the plant response to optimized in vitro culture was evaluated, by quantifying the total polyphenolic content, the total flavonoid content and the antioxidant activity, both under in vitro and ex vitro conditions. Four closely related potato genotypes were analysed: the wild species Solanum bulbocatanum, S. tuberosum cv. 'Rasant' and two somatic hybrids between them. For all genotypes, both total polyphenolic content and antioxidant activity were increasing under optimized in vitro culture. The shoot responses were genotype dependent and the two somatic hybrids were intermediate between the parents both as morphology and reaction to in vitro stress. The somatic hybrid 1508/5, having morphology similar to potato, was reacting as the wild species, while the somatic hybrid 1508/2, with a similar morphology to the wild species was reacting as potato to in vitro stress. The somatic hybrid 1508/5 being also resistant to late blight is of interest for further use in pre-breeding. Total flavonoid content is decreasing under in vitro as compared to ex vitro conditions, UV-B radiation, the major trigger of flavonoid biosynthesis being absent in the fluorescent light. This study reveals the effect of in vitro culture on flavonoid content and details aspects of the biochemical parameters involved in plant in vitro stress.

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Effects of abiotic stress on plants: a systems biology perspective

Cited by 1,140 publications

References 135 publications

The OsMYB30 Transcription Factor Suppresses Cold Tolerance by Interacting with a JAZ Protein and Suppressing β-Amylase Expression

The OsMYB30 Transcription Factor Suppresses Cold Tolerance by Interacting with a JAZ Protein and Suppressing β-Amylase Expression

Ethylene response factors gene regulation and expression profiles under different stresses in rice

In Vitro Culture as a Stressful Factor Triggers Changes in Polyphenols, Flavonoids and Antioxidant Activity in Somatic Hybrids between Solanum tuberosum and S. bulbocastanum and their Respective Parents

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