A novel role for methyl cysteinate, a cysteine derivative, in cesium accumulation in Arabidopsis thaliana

被引：14

作者：

Adams, Eri ^{[1
]}

Miyazaki, Takae ^{[1
]}

Hayaishi-Satoh, Aya ^{[1
,5
]}

Han, Minwoo ^{[1
,2
]}

Kusano, Miyako ^{[1
,3
]}

Khandelia, Himanshu ^{[2
]}

Saito, Kazuki ^{[1
,4
]}

Shin, Ryoung ^{[1
]}

机构：

[1] RIKEN, Ctr Sustainable Resource Sci, Tsurumi Ku, 1-7-22 Suehiro Cho, Yokohama, Kanagawa 2300045, Japan

[2] Univ Southern Denmark, Ctr BioMembrane Phys, MEMPHYS, Campusvej 55, DK-5230 Odense M, Denmark

[3] Univ Tsukuba, Grad Sch Life & Environm Sci, 1-1-1 Ten Noudai, Tsukuba, Ibaraki 3058572, Japan

[4] Chiba Univ, Grad Sch Pharmaceut Sci, Chiba 2608675, Japan

[5] SOKENDAI, Sch Adv Sci, Hayama, Kanagawa 2400193, Japan

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

关键词：

EFFECTIVE CORE POTENTIALS; CONTAMINATED SOIL; MOLECULAR CALCULATIONS; CS-137; UPTAKE; ELEVATED CO2; RADIOCESIUM; PLANTS; INOCULATION; PHYTOEXTRACTION; BIOSORPTION;

D O I：

10.1038/srep43170

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Phytoaccumulation is a technique to extract metals from soil utilising ability of plants. Cesium is a valuable metal while radioactive isotopes of cesium can be hazardous. In order to establish a more efficient phytoaccumulation system, small molecules which promote plants to accumulate cesium were investigated. Through chemical library screening, 14 chemicals were isolated as 'cesium accumulators' in Arabidopsis thaliana. Of those, methyl cysteinate, a derivative of cysteine, was found to function within the plant to accumulate externally supplemented cesium. Moreover, metabolite profiling demonstrated that cesium treatment increased cysteine levels in Arabidopsis. The cesium accumulation effect was not observed for other cysteine derivatives or amino acids on the cysteine metabolic pathway tested. Our results suggest that methyl cysteinate, potentially metabolised from cysteine, binds with cesium on the surface of the roots or inside plant cells and improve phytoaccumulation.

引用

页数：12

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[1] Selective chemical binding enhances cesium tolerance in plants through inhibition of cesium uptake [J].