Modulation of auxin content in Arabidopsis confers improved drought stress resistance

Shi, Haitao; Chen, Li; Ye, Tiantian; Liu, Xiaodong; Ding, Kun; Chan, Zhulong

doi:10.1016/j.plaphy.2014.06.008

Cited by 258 publications

(148 citation statements)

References 39 publications

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“…Some carbon metabolites including amino acids, organic acids, sugars, sugar alcohols and aromatic amines were also significantly affected by auxin under drought stress. Endogenous and exogenous auxin positively modulated root architecture especially the lateral root number (Shi et al 2014). …”

Section: Droughtmentioning

confidence: 99%

Glutathione in plants: biosynthesis and physiological role in environmental stress tolerance

Hasanuzzaman

Nahar

Anee

et al. 2017

Physiol Mol Biol Plants

616

284

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Glutathione (GSH; c-glutamyl-cysteinyl-glycine) is a small intracellular thiol molecule which is considered as a strong non-enzymatic antioxidant. Glutathione regulates multiple metabolic functions; for example, it protects membranes by maintaining the reduced state of both a-tocopherol and zeaxanthin, it prevents the oxidative denaturation of proteins under stress conditions by protecting their thiol groups, and it serves as a substrate for both glutathione peroxidase and glutathione S-transferase. By acting as a precursor of phytochelatins, GSH helps in the chelating of toxic metals/metalloids which are then transported and sequestered in the vacuole. The glyoxalase pathway (consisting of glyoxalase I and glyoxalase II enzymes) for detoxification of methylglyoxal, a cytotoxic molecule, also requires GSH in the first reaction step. For these reasons, much attention has recently been directed to elucidation of the role of this molecule in conferring tolerance to abiotic stress. Recently, this molecule has drawn much attention because of its interaction with other signaling molecules and phytohormones. In this review, we have discussed the recent progress in GSH biosynthesis, metabolism and its role in abiotic stress tolerance.

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Section: Droughtmentioning

confidence: 99%

Glutathione in plants: biosynthesis and physiological role in environmental stress tolerance

Hasanuzzaman

Nahar

Anee

et al. 2017

Physiol Mol Biol Plants

616

284

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show abstract

“…CIPK6 is also known to function in auxin transport (Tripathi et al 2009). It has been demonstrated that auxin might participate in positive regulation of drought tolerance through regulation of root architecture, expression of ABAresponsive genes, ROS metabolism and metabolic homeostasis (Shi et al 2014). In accordance with the activation of B. napus CIPK6 and auxin in response to drought, the results also showed significant downregulation of the B. napus IAA16, a negative regulator of auxin signaling (Park et al 2011), under drought stress by the increased activity of miR1536.…”

Section: Drought-induced Ca 2+ Signaling and Auxin Responsementioning

confidence: 56%

Mining expressed sequence tags of rapeseed (Brassica napus L.) to predict the drought responsive regulatory network

Shamloo‐Dashtpagerdi

Razi

Ebrahimie

2015

Physiol Mol Biol Plants

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It is of great significance to understand the regulatory mechanisms by which plants deal with drought stress. Two EST libraries derived from rapeseed (Brassica napus) leaves in non-stressed and drought stress conditions were analyzed in order to obtain the transcriptomic landscape of drought-exposed B. napus plants, and also to identify and characterize significant drought responsive regulatory genes and microRNAs. The functional ontology analysis revealed a substantial shift in the B. napus transcriptome to govern cellular drought responsiveness via different stress-activated mechanisms. The activity of transcription factor and protein kinase modules generally increased in response to drought stress. The 26 regulatory genes consisting of 17 transcription factor genes, eight protein kinase genes and one protein phosphatase gene were identified showing significant alterations in their expressions in response to drought stress. We also found the six microRNAs which were differentially expressed during drought stress supporting the involvement of a posttranscriptional level of regulation for B. napus drought response. The drought responsive regulatory network shed light on the significance of some regulatory components involved in biosynthesis and signaling of various plant hormones (abscisic acid, auxin and brassinosteroids), ubiquitin proteasome system, and signaling through Reactive Oxygen Species (ROS). Our findings suggested a complex and multi-level regulatory system modulating response to drought stress in B. napus.

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“…In plants, IAA is involved in multiple growth processes and stress responses. 14,15 The higher amount of IAA produced by bacteria cultivated under the higher concentration of copper in this study may be response of the microorganisms to stress. Higher amount of exopolysaccharides production by M. loti strains SEMIA806 and SEMIA816 under a more stressful environment concerning pH of the culture media was previously reported.…”

Section: Iaa Synthesismentioning

confidence: 81%

In vitro growth and indoleacetic acid production by Mesorhizobium loti SEMIA806 and SEMIA816 under the influence of copper ions

Vieira

Silva

Stefenon

2017

Microbiol Res (Pavia)

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The indoleacetic acid produced by symbiotic bacteria is an important phytohormone signaling microbe-plant interaction, being therefore essential for rhizoremediation. In this study, the effect of different concentrations of copper ions on the bacterial growth and indoleacetic acid production was investigated in two strains of Mesorhizobium loti in in vitro conditions, aiming to determine critical concentrations of this heavy metal for rhizoremediation of contaminated soils using this bacterium. The experiment consisted on a control culture without copper and three treatments supplemented with 10 mg.L -1 , 20 mg.L -1 or 50 mg.L -1 of CuSO 4 . For both strains, the growth stopped after 48h and no significant difference was observed across treatments. The production of indoleacetic acid by the control treatment without copper was significantly higher in comparison to the copper-containing treatments. Mesorhizobium loti SEMIA806 and SEMIA816 are resistant to up to 50 mg.L -1 of CuSO 4 in the culture medium, presenting effective growth. The synthesis of indoleacetic acid was strongly reduced but not excluded by ions copper in the medium. So, it is expected that environmental copper found in the soil up to the concentration of 50 mg.L -1 will not preclude the symbiotic interaction between M. loti and leguminous host plant in rhizoremediation enterprises.

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Modulation of auxin content in Arabidopsis confers improved drought stress resistance

Cited by 258 publications

References 39 publications

Glutathione in plants: biosynthesis and physiological role in environmental stress tolerance

Glutathione in plants: biosynthesis and physiological role in environmental stress tolerance

Mining expressed sequence tags of rapeseed (Brassica napus L.) to predict the drought responsive regulatory network

In vitro growth and indoleacetic acid production by Mesorhizobium loti SEMIA806 and SEMIA816 under the influence of copper ions

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