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Li Y, Mo L, Zhou X, Yao Y, Ma J, Liu K, Yu F. Characterization of plant growth-promoting traits of Enterobacter sp. and its ability to promote cadmium/lead accumulation in Centella asiatica L. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:4101-4115. [PMID: 34405329 DOI: 10.1007/s11356-021-15948-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 08/09/2021] [Indexed: 05/22/2023]
Abstract
In the present study, we characterized the plant growth-promoting traits of Enterobacter sp. FM-1 (FM-1) and investigated its ability to promote growth and increase IAA, P, and Fe concentrations as well as Cd and Pb accumulation in Centella asiatica L. (C. asiatica L.) in upstream area (UA) soil and downstream area (DA) soil that we collected from Siding mine. The results demonstrated that FM-1 secreted IAA, produced siderophores, and had P-solubilization ability even under Cd exposure. IAA secretion reached a maximum of 108.3 ± 1.3 mg L-1 under Cd exposure at 25 mg L-1. Siderophore production reached a maximum of 0.94 ± 0.01 under Cd exposure at 50 mg L-1. Pot experiments indicated that FM-1 successfully colonized the roots of C. asiatica L. In both soils, inoculation with FM-1 decreased the pH in rhizosphere soil and increased the bioavailability of both Cd and Pb. In addition, inoculation with FM-1 increased the IAA, P, and Fe concentrations and simultaneously promoted both Cd and Pb accumulation in C. asiatica L. The Cd and Pb concentrations in leaves increased 1.73- and 1.07-fold in the UA soil and 1.25- and 1.11-fold in the DA soil, respectively. Thus, the Cd-resistant strain FM-1 presented excellent PGP traits and could facilitate Cd and Pb phytoremediation by C. asiatica L.
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Affiliation(s)
- Yi Li
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- College of Life Science, Guangxi Normal University, 15th YuCai St., QiXing District, Guilin, 541004, China
- College of Life Science, Guangxi Normal University, 15th YuCai St., QiXing District, Guilin, 541004, China
| | - Lijuan Mo
- College of Life Science, Guangxi Normal University, 15th YuCai St., QiXing District, Guilin, 541004, China
| | - Xiaoqin Zhou
- College of Life Science, Guangxi Normal University, 15th YuCai St., QiXing District, Guilin, 541004, China
| | - Yawei Yao
- College of Life Science, Guangxi Normal University, 15th YuCai St., QiXing District, Guilin, 541004, China
| | - Jiangming Ma
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China
- Innovation Institute of Sustainable Development, Guangxi Normal University, Guilin, 541004, China
- College of Life Science, Guangxi Normal University, 15th YuCai St., QiXing District, Guilin, 541004, China
| | - Kehui Liu
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China.
- Innovation Institute of Sustainable Development, Guangxi Normal University, Guilin, 541004, China.
- College of Life Science, Guangxi Normal University, 15th YuCai St., QiXing District, Guilin, 541004, China.
| | - Fangming Yu
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, China.
- College of Life Science, Guangxi Normal University, 15th YuCai St., QiXing District, Guilin, 541004, China.
- College of Life Science, Guangxi Normal University, 15th YuCai St., QiXing District, Guilin, 541004, China.
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Kumar S, Huang X, Li G, Ji Q, Zhou K, Zhu G, Ke W, Hou H, Zhu H, Yang J. Comparative Transcriptomic Analysis Provides Novel Insights into the Blanched Stem of Oenanthe javanica. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10112484. [PMID: 34834849 PMCID: PMC8625949 DOI: 10.3390/plants10112484] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/05/2021] [Accepted: 11/11/2021] [Indexed: 06/13/2023]
Abstract
In the agricultural field, blanching is a technique used to obtain tender, sweet, and delicious water dropwort stems by blocking sunlight. The physiological and nutritional parameters of blanched water dropwort have been previously investigated. However, the molecular mechanism of blanching remains unclear. In the present study, we investigated transcriptomic variations for different blanching periods in the stem of water dropwort (pre, mid, post-blanching, and control). The results showed that many genes in pathways, such as photosynthesis, carbon fixation, and phytohormone signal transduction as well as transcription factors (TFs) were significantly dysregulated. Blanched stems of water dropwort showed the higher number of downregulated genes in pathways, such as photosynthesis, antenna protein, carbon fixation in photosynthetic organisms, and porphyrin and chlorophyll metabolism, which ultimately affect the photosynthesis in water dropwort. The genes of hormone signal transduction pathways (ethylene, jasmonic acid, brassinosteroid, and indole-3-acetic acid) showed upregulation in the post-blanched water dropwort plants. Overall, a higher number of genes coding for TFs, such as ERF, BHLH, MYB, zinc-finger, bZIP, and WRKY were overexpressed in blanched samples in comparison with the control. These genes and pathways participate in inducing the length, developmental processes, pale color, and stress tolerance of the blanched stem. Overall, the genes responsive to blanching, which were identified in this study, provide an effective foundation for further studies on the molecular mechanisms of blanching and photosynthesis regulations in water dropwort and other species.
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Affiliation(s)
- Sunjeet Kumar
- The State Key Laboratory of Freshwater Ecology and Biotechnology, The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (S.K.); (G.L.); (H.H.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, Engineering Research Center of the Ministry of Education for New Variety Breeding of Tropical Crop, School of Horticulture, Hainan University, Haikou 570228, China;
| | - Xinfang Huang
- Institute of Vegetables, Wuhan Academy of Agricultural Sciences, Wuhan 430207, China; (X.H.); (Q.J.); (K.Z.); (W.K.)
| | - Gaojie Li
- The State Key Laboratory of Freshwater Ecology and Biotechnology, The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (S.K.); (G.L.); (H.H.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qun Ji
- Institute of Vegetables, Wuhan Academy of Agricultural Sciences, Wuhan 430207, China; (X.H.); (Q.J.); (K.Z.); (W.K.)
| | - Kai Zhou
- Institute of Vegetables, Wuhan Academy of Agricultural Sciences, Wuhan 430207, China; (X.H.); (Q.J.); (K.Z.); (W.K.)
| | - Guopeng Zhu
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, Engineering Research Center of the Ministry of Education for New Variety Breeding of Tropical Crop, School of Horticulture, Hainan University, Haikou 570228, China;
| | - Weidong Ke
- Institute of Vegetables, Wuhan Academy of Agricultural Sciences, Wuhan 430207, China; (X.H.); (Q.J.); (K.Z.); (W.K.)
| | - Hongwei Hou
- The State Key Laboratory of Freshwater Ecology and Biotechnology, The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (S.K.); (G.L.); (H.H.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Honglian Zhu
- Institute of Vegetables, Wuhan Academy of Agricultural Sciences, Wuhan 430207, China; (X.H.); (Q.J.); (K.Z.); (W.K.)
| | - Jingjing Yang
- The State Key Laboratory of Freshwater Ecology and Biotechnology, The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; (S.K.); (G.L.); (H.H.)
- University of Chinese Academy of Sciences, Beijing 100049, China
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