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Dissecting MicroRNA-mRNA Regulatory Networks Underlying Sulfur Assimilation and Cadmium Accumulation in Poplar Leaves.

Identifieur interne : 000474 ( Main/Exploration ); précédent : 000473; suivant : 000475

Dissecting MicroRNA-mRNA Regulatory Networks Underlying Sulfur Assimilation and Cadmium Accumulation in Poplar Leaves.

Auteurs : Wenguang Shi [République populaire de Chine] ; Wenzhe Liu [République populaire de Chine] ; Chaofeng Ma [République populaire de Chine] ; Yuhong Zhang [République populaire de Chine] ; Shen Ding [République populaire de Chine] ; Wenjian Yu [République populaire de Chine] ; Shurong Deng [République populaire de Chine] ; Jing Zhou [République populaire de Chine] ; Hong Li [République populaire de Chine] ; Zhi-Bin Luo [République populaire de Chine]

Source :

RBID : pubmed:32678905

Abstract

The process of cadmium (Cd) accumulation and detoxification under different sulfur levels remains largely unknown in woody plants. To investigate the physiological and transcriptomic regulation mechanisms of poplars in response to different sulfate (S) supply levels and Cd exposure, we exposed Populus deltoides saplings to one of the low, moderate and high S levels together with either 0 or 50 µM Cd. Cd accumulation was decreased in low S-treated poplar leaves, and it tended to be increased in high S-supplied leaves under the Cd exposure condition. Sulfur nutrition was deficient in low S-supplied poplars, and it was improved in high S-treated leaves. Cd exposure resulted in lower sulfur level in the leaves supplied with moderate S, it exacerbated a Cd-induced sulfur decrease in low S-treated leaves and it caused a higher sulfur concentration in high S-supplied leaves. In line with the physiological changes, a number of mRNAs and microRNAs (miRNAs) involved in Cd accumulation and sulfur assimilation were identified and the miRNA-mRNA networks were dissected. In the networks, miR395 and miR399 members were identified as hub miRNAs and their targets were ATP sulfurylase 3 (ATPS3) and phosphate 2 (PHO2), respectively. These results suggest that Cd accumulation and sulfur assimilation are constrained by low and enhanced by high S supply, and Cd toxicity is aggravated by low and relieved by high S in poplar leaves, and that miRNA-mRNA regulatory networks play pivotal roles in sulfur-mediated Cd accumulation and detoxification in Cd-exposed poplars.

DOI: 10.1093/pcp/pcaa084
PubMed: 32678905


Affiliations:


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<div type="abstract" xml:lang="en">The process of cadmium (Cd) accumulation and detoxification under different sulfur levels remains largely unknown in woody plants. To investigate the physiological and transcriptomic regulation mechanisms of poplars in response to different sulfate (S) supply levels and Cd exposure, we exposed Populus deltoides saplings to one of the low, moderate and high S levels together with either 0 or 50 µM Cd. Cd accumulation was decreased in low S-treated poplar leaves, and it tended to be increased in high S-supplied leaves under the Cd exposure condition. Sulfur nutrition was deficient in low S-supplied poplars, and it was improved in high S-treated leaves. Cd exposure resulted in lower sulfur level in the leaves supplied with moderate S, it exacerbated a Cd-induced sulfur decrease in low S-treated leaves and it caused a higher sulfur concentration in high S-supplied leaves. In line with the physiological changes, a number of mRNAs and microRNAs (miRNAs) involved in Cd accumulation and sulfur assimilation were identified and the miRNA-mRNA networks were dissected. In the networks, miR395 and miR399 members were identified as hub miRNAs and their targets were ATP sulfurylase 3 (ATPS3) and phosphate 2 (PHO2), respectively. These results suggest that Cd accumulation and sulfur assimilation are constrained by low and enhanced by high S supply, and Cd toxicity is aggravated by low and relieved by high S in poplar leaves, and that miRNA-mRNA regulatory networks play pivotal roles in sulfur-mediated Cd accumulation and detoxification in Cd-exposed poplars.</div>
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<AbstractText>The process of cadmium (Cd) accumulation and detoxification under different sulfur levels remains largely unknown in woody plants. To investigate the physiological and transcriptomic regulation mechanisms of poplars in response to different sulfate (S) supply levels and Cd exposure, we exposed Populus deltoides saplings to one of the low, moderate and high S levels together with either 0 or 50 µM Cd. Cd accumulation was decreased in low S-treated poplar leaves, and it tended to be increased in high S-supplied leaves under the Cd exposure condition. Sulfur nutrition was deficient in low S-supplied poplars, and it was improved in high S-treated leaves. Cd exposure resulted in lower sulfur level in the leaves supplied with moderate S, it exacerbated a Cd-induced sulfur decrease in low S-treated leaves and it caused a higher sulfur concentration in high S-supplied leaves. In line with the physiological changes, a number of mRNAs and microRNAs (miRNAs) involved in Cd accumulation and sulfur assimilation were identified and the miRNA-mRNA networks were dissected. In the networks, miR395 and miR399 members were identified as hub miRNAs and their targets were ATP sulfurylase 3 (ATPS3) and phosphate 2 (PHO2), respectively. These results suggest that Cd accumulation and sulfur assimilation are constrained by low and enhanced by high S supply, and Cd toxicity is aggravated by low and relieved by high S in poplar leaves, and that miRNA-mRNA regulatory networks play pivotal roles in sulfur-mediated Cd accumulation and detoxification in Cd-exposed poplars.</AbstractText>
<CopyrightInformation>© The Author(s) 2020. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For permissions, please email: journals.permissions@oup.com.</CopyrightInformation>
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<Affiliation>College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China.</Affiliation>
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<Keyword MajorTopicYN="N">Heavy metal</Keyword>
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<Year>2020</Year>
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<country>
<li>République populaire de Chine</li>
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<li>Pékin</li>
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<name sortKey="Shi, Wenguang" sort="Shi, Wenguang" uniqKey="Shi W" first="Wenguang" last="Shi">Wenguang Shi</name>
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<name sortKey="Deng, Shurong" sort="Deng, Shurong" uniqKey="Deng S" first="Shurong" last="Deng">Shurong Deng</name>
<name sortKey="Ding, Shen" sort="Ding, Shen" uniqKey="Ding S" first="Shen" last="Ding">Shen Ding</name>
<name sortKey="Li, Hong" sort="Li, Hong" uniqKey="Li H" first="Hong" last="Li">Hong Li</name>
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<name sortKey="Luo, Zhi Bin" sort="Luo, Zhi Bin" uniqKey="Luo Z" first="Zhi-Bin" last="Luo">Zhi-Bin Luo</name>
<name sortKey="Ma, Chaofeng" sort="Ma, Chaofeng" uniqKey="Ma C" first="Chaofeng" last="Ma">Chaofeng Ma</name>
<name sortKey="Ma, Chaofeng" sort="Ma, Chaofeng" uniqKey="Ma C" first="Chaofeng" last="Ma">Chaofeng Ma</name>
<name sortKey="Yu, Wenjian" sort="Yu, Wenjian" uniqKey="Yu W" first="Wenjian" last="Yu">Wenjian Yu</name>
<name sortKey="Zhang, Yuhong" sort="Zhang, Yuhong" uniqKey="Zhang Y" first="Yuhong" last="Zhang">Yuhong Zhang</name>
<name sortKey="Zhang, Yuhong" sort="Zhang, Yuhong" uniqKey="Zhang Y" first="Yuhong" last="Zhang">Yuhong Zhang</name>
<name sortKey="Zhou, Jing" sort="Zhou, Jing" uniqKey="Zhou J" first="Jing" last="Zhou">Jing Zhou</name>
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