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Open AccessArticle

SLIM1 Transcription Factor Promotes Sulfate Uptake and Distribution to Shoot, Along with Phytochelatin Accumulation, Under Cadmium Stress in Arabidopsis thaliana

1
Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
2
NARO Tohoku Agricultural Research Center, 4 Akahira, Shimo-Kuriyagawa, Morioka 020-0198, Japan
3
Ministry of Science and Technology, Biotechnology and Ecology Institute, Genetic Resources Division, Don Teaw village, KM 14 office, Tha Ngon Road, Xaythany district, Vientiane 01170, Laos
4
Faculty of Bioscience, Fukui Prefectural University, 4-1-1 Kenjojima, Matsuoka, Eiheiji-town, Fukui 910-1195, Japan
5
Department of Food and Fermentation Sciences, Faculty of Food and Nutrition Sciences, Beppu University, 82 Kita-Ishigaki, Beppu, Oita 874-8501, Japan
6
Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
7
Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi, Tokyo 183-8509, Japan
*
Author to whom correspondence should be addressed.
Plants 2020, 9(2), 163; https://doi.org/10.3390/plants9020163
Received: 27 November 2019 / Revised: 22 January 2020 / Accepted: 25 January 2020 / Published: 29 January 2020
Sulfur (S) assimilation, which is initiated by sulfate uptake, generates cysteine, the substrate for glutathione (GSH) and phytochelatin (PC) synthesis. GSH and PC contribute to cadmium (Cd) detoxification by capturing it for sequestration. Although Cd exposure is known to induce the expression of S-assimilating enzyme genes, including sulfate transporters (SULTRs), mechanisms of their transcriptional regulation are not well understood. Transcription factor SLIM1 controls transcriptional changes during S deficiency (−S) in Arabidopsis thaliana. We examined the potential involvement of SLIM1 in inducing the S assimilation pathway and PC accumulation. Cd treatment reduced the shoot fresh weight in the sulfur limitation1 (slim1) mutant but not in the parental line (1;2PGN). Cd-induced increases of sulfate uptake and SULTR1;2 expressions were diminished in the slim1 mutant, suggesting that SLIM1 is involved in inducing sulfate uptake during Cd exposure. The GSH and PC levels were lower in slim1 than in the parental line, indicating that SLIM1 was required for increasing PC during Cd treatment. Hence, SLIM1 indirectly contributes to Cd tolerance of plants by inducing −S responses in the cell caused by depleting the GSH pool, which is consumed by enhanced PC synthesis and sequestration to the vacuole. View Full-Text
Keywords: Cadmium stress; Arabidopsis thaliana; sulfate transport; SLIM1 transcription factor; phytochelatin Cadmium stress; Arabidopsis thaliana; sulfate transport; SLIM1 transcription factor; phytochelatin
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MDPI and ACS Style

Yamaguchi, C.; Khamsalath, S.; Takimoto, Y.; Suyama, A.; Mori, Y.; Ohkama-Ohtsu, N.; Maruyama-Nakashita, A. SLIM1 Transcription Factor Promotes Sulfate Uptake and Distribution to Shoot, Along with Phytochelatin Accumulation, Under Cadmium Stress in Arabidopsis thaliana. Plants 2020, 9, 163. https://doi.org/10.3390/plants9020163

AMA Style

Yamaguchi C, Khamsalath S, Takimoto Y, Suyama A, Mori Y, Ohkama-Ohtsu N, Maruyama-Nakashita A. SLIM1 Transcription Factor Promotes Sulfate Uptake and Distribution to Shoot, Along with Phytochelatin Accumulation, Under Cadmium Stress in Arabidopsis thaliana. Plants. 2020; 9(2):163. https://doi.org/10.3390/plants9020163

Chicago/Turabian Style

Yamaguchi, Chisato; Khamsalath, Soudthedlath; Takimoto, Yuki; Suyama, Akiko; Mori, Yuki; Ohkama-Ohtsu, Naoko; Maruyama-Nakashita, Akiko. 2020. "SLIM1 Transcription Factor Promotes Sulfate Uptake and Distribution to Shoot, Along with Phytochelatin Accumulation, Under Cadmium Stress in Arabidopsis thaliana" Plants 9, no. 2: 163. https://doi.org/10.3390/plants9020163

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