Interplay of ZnONPs and/or SeNPs induces arsenic tolerance in soybean by regulation of antioxidants pool, WRKY genes, and expression of arsenic transporters

2022 ◽  
pp. 104783
Author(s):  
Muhammad Zeeshan ◽  
Yu Xin Hu ◽  
Muhammad Siddique Afridi ◽  
Bushra Ahmad ◽  
Shakeel Ahmad ◽  
...  
Keyword(s):  
Arsenic Tolerance

scholarly journals A molecular switch in sulfur metabolism to reduce arsenic and enrich selenium in rice grain

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Sheng-Kai Sun ◽  
Xuejie Xu ◽  
Zhong Tang ◽  
Zhu Tang ◽  
Xin-Yuan Huang ◽  
...  
Keyword(s):  
Grain Quality ◽  
Sulfur Metabolism ◽  
Physical Interaction ◽  
Rice Grain ◽  
Yield Losses ◽  
Serine Acetyltransferase ◽  
Cysteine Synthase ◽  
Arsenic Tolerance ◽  
Arsenic Accumulation ◽  
Low Levels

AbstractRice grains typically contain high levels of toxic arsenic but low levels of the essential micronutrient selenium. Anthropogenic arsenic contamination of paddy soils exacerbates arsenic toxicity in rice crops resulting in substantial yield losses. Here, we report the identification of the gain-of-function arsenite tolerant 1 (astol1) mutant of rice that benefits from enhanced sulfur and selenium assimilation, arsenic tolerance, and decreased arsenic accumulation in grains. The astol1 mutation promotes the physical interaction of the chloroplast-localized O-acetylserine (thiol) lyase protein with its interaction partner serine-acetyltransferase in the cysteine synthase complex. Activation of the serine-acetyltransferase in this complex promotes the uptake of sulfate and selenium and enhances the production of cysteine, glutathione, and phytochelatins, resulting in increased tolerance and decreased translocation of arsenic to grains. Our findings uncover the pivotal sensing-function of the cysteine synthase complex in plastids for optimizing stress resilience and grain quality by regulating a fundamental macronutrient assimilation pathway.

scholarly journals Overexpression of Phytochelatin Synthase in Arabidopsis Leads to Enhanced Arsenic Tolerance and Cadmium Hypersensitivity

2004 ◽  
Vol 45 (12) ◽  
pp. 1787-1797 ◽  
Author(s):  
Yujing Li ◽  
Om Parkash Dhankher ◽  
Laura Carreira ◽  
David Lee ◽  
Alice Chen ◽  
...  
Keyword(s):  
Phytochelatin Synthase ◽  
Arsenic Tolerance

scholarly journals Arsenic Directly Binds to and Activates the Yeast AP-1-Like Transcription Factor Yap8

2015 ◽  
Vol 36 (6) ◽  
pp. 913-922 ◽  
Author(s):  
Nallani Vijay Kumar ◽  
Jianbo Yang ◽  
Jitesh K. Pillai ◽  
Swati Rawat ◽  
Carlos Solano ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Transcriptional Activation ◽  
Transcriptional Response ◽  
Transcriptional Regulator ◽  
Yeast Protein ◽  
Content Type ◽  
Arsenic Tolerance ◽  
Arsenic Sensing

The AP-1-like transcription factor Yap8 is critical for arsenic tolerance in the yeastSaccharomyces cerevisiae. However, the mechanism by which Yap8 senses the presence of arsenic and activates transcription of detoxification genes is unknown. Here we demonstrate that Yap8 directly binds to trivalent arsenite [As(III)]in vitroandin vivoand that approximately one As(III) molecule is bound per molecule of Yap8. As(III) is coordinated by three sulfur atoms in purified Yap8, and our genetic and biochemical data identify the cysteine residues that form the binding site as Cys132, Cys137, and Cys274. As(III) binding by Yap8 does not require an additional yeast protein, and Yap8 is regulated neither at the level of localization nor at the level of DNA binding. Instead, our data are consistent with a model in which a DNA-bound form of Yap8 acts directly as an As(III) sensor. Binding of As(III) to Yap8 triggers a conformational change that in turn brings about a transcriptional response. Thus, As(III) binding to Yap8 acts as a molecular switch that converts inactive Yap8 into an active transcriptional regulator. This is the first report to demonstrate how a eukaryotic protein couples arsenic sensing to transcriptional activation.

scholarly journals A Vacuolar Arsenite Transporter Necessary for Arsenic Tolerance in the Arsenic Hyperaccumulating Fern Pteris vittata Is Missing in Flowering Plants

2010 ◽  
Vol 22 (6) ◽  
pp. 2045-2057 ◽  
Author(s):  
Emily Indriolo ◽  
GunNam Na ◽  
Danielle Ellis ◽  
David E. Salt ◽  
Jo Ann Banks
Keyword(s):  
Flowering Plants ◽  
Pteris Vittata ◽  
Arsenic Tolerance

Anthocyanin-mediated arsenic tolerance in plants

2021 ◽  
pp. 118475
Author(s):  
Golam Jalal Ahammed ◽  
Youxin Yang
Keyword(s):  
Arsenic Tolerance
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