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Article

Genome-Wide Identification, Structure Characterization, Expression Pattern Profiling, and Substrate Specificity of the Metal Tolerance Protein Family in Canavalia rosea (Sw.) DC

by
Tao Zou
1,2,3,
Ruoyi Lin
1,3,4,
Lin Pu
1,3,4,
Qiming Mei
1,2,4,5,
Zhengfeng Wang
1,4,5,6,
Shuguang Jian
1,4 and
Mei Zhang
1,2,*
1
Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
2
Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Guangzhou 510650, China
3
University of the Chinese Academy of Sciences, Beijing 100039, China
4
CAS Engineering Laboratory for Vegetation Ecosystem Restoration on Islands and Coastal Zones, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
5
Center for Plant Ecology, Core Botanical Gardens, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Chinese Academy of Sciences, Guangzhou 510650, China
6
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
*
Author to whom correspondence should be addressed.
Plants 2021, 10(7), 1340; https://doi.org/10.3390/plants10071340
Submission received: 31 May 2021 / Revised: 22 June 2021 / Accepted: 29 June 2021 / Published: 30 June 2021
(This article belongs to the Special Issue Physiological and Molecular Mechanisms of Plant Response to Metal Stress)
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Abstract

Plant metal tolerance proteins (MTPs) play key roles in heavy metal absorption and homeostasis in plants. By using genome-wide and phylogenetic approaches, the origin and diversification of MTPs from Canavalia rosea (Sw.) DC. was explored. Canavalia rosea (bay bean) is an extremophile halophyte with strong adaptability to seawater and drought and thereby shows specific metal tolerance with a potential phytoremediation ability. However, MTP genes in leguminous plants remain poorly understood. In our study, a total of 12 MTP genes were identified in C. rosea. Multiple sequence alignments showed that all CrMTP proteins possessed the conserved transmembrane domains (TM1 to TM6) and could be classified into three subfamilies: Zn-CDFs (five members), Fe/Zn-CDFs (five members), and Mn-CDFs (two members). Promoter cis-acting element analyses revealed that a distinct number and composition of heavy metal regulated elements and other stress-responsive elements existed in different promoter regions of CrMTPs. Analysis of transcriptome data revealed organ-specific expression of CrMTP genes and the involvement of this family in heavy metal stress responses and adaptation of C. rosea to extreme coral reef environments. Furthermore, the metal-specific activity of several functionally unknown CrMTPs was investigated in yeast. These results will contribute to uncovering the potential functions and molecular mechanisms of heavy metal absorption, translocation, and accumulation in C. rosea plants.
Keywords: metal tolerance protein; metal specificity; ecological adaptation; Canavalia rosea (Sw.) DC metal tolerance protein; metal specificity; ecological adaptation; Canavalia rosea (Sw.) DC

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MDPI and ACS Style

Zou, T.; Lin, R.; Pu, L.; Mei, Q.; Wang, Z.; Jian, S.; Zhang, M. Genome-Wide Identification, Structure Characterization, Expression Pattern Profiling, and Substrate Specificity of the Metal Tolerance Protein Family in Canavalia rosea (Sw.) DC. Plants 2021, 10, 1340. https://doi.org/10.3390/plants10071340

AMA Style

Zou T, Lin R, Pu L, Mei Q, Wang Z, Jian S, Zhang M. Genome-Wide Identification, Structure Characterization, Expression Pattern Profiling, and Substrate Specificity of the Metal Tolerance Protein Family in Canavalia rosea (Sw.) DC. Plants. 2021; 10(7):1340. https://doi.org/10.3390/plants10071340

Chicago/Turabian Style

Zou, Tao, Ruoyi Lin, Lin Pu, Qiming Mei, Zhengfeng Wang, Shuguang Jian, and Mei Zhang. 2021. "Genome-Wide Identification, Structure Characterization, Expression Pattern Profiling, and Substrate Specificity of the Metal Tolerance Protein Family in Canavalia rosea (Sw.) DC" Plants 10, no. 7: 1340. https://doi.org/10.3390/plants10071340

APA Style

Zou, T., Lin, R., Pu, L., Mei, Q., Wang, Z., Jian, S., & Zhang, M. (2021). Genome-Wide Identification, Structure Characterization, Expression Pattern Profiling, and Substrate Specificity of the Metal Tolerance Protein Family in Canavalia rosea (Sw.) DC. Plants, 10(7), 1340. https://doi.org/10.3390/plants10071340

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