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Yang X, Cai J, Xue J, Luo X, Zhu W, Xiao X, Xue M, An F, Li K, Chen S. Magnesium chelatase subunit D is not only required for chlorophyll biosynthesis and photosynthesis, but also affecting starch accumulation in Manihot esculenta Crantz. BMC PLANT BIOLOGY 2023; 23:258. [PMID: 37189053 DOI: 10.1186/s12870-023-04224-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 04/12/2023] [Indexed: 05/17/2023]
Abstract
BACKGROUND Magnesium chelatase plays an important role in photosynthesis, but only a few subunits have been functionally characterized in cassava. RESULTS Herein, MeChlD was successfully cloned and characterized. MeChlD encodes a magnesium chelatase subunit D, which has ATPase and vWA conservative domains. MeChlD was highly expressed in the leaves. Subcellular localization suggested that MeChlD:GFP was a chloroplast-localized protein. Furthermore, the yeast two-hybrid system and BiFC analysis indicated that MeChlD interacts with MeChlM and MePrxQ, respectively. VIGS-induce silencing of MeChlD resulted in significantly decreased chlorophyll content and reduction the expression of photosynthesis-related nuclear genes. Furthermore, the storage root numbers, fresh weight and the total starch content in cassava storage roots of VIGS-MeChlD plants was significantly reduced. CONCLUSION Taken together, MeChlD located at the chloroplast is not only required for chlorophyll biosynthesis and photosynthesis, but also affecting the starch accumulation in cassava. This study expands our understanding of the biological functions of ChlD proteins.
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Affiliation(s)
- Xingai Yang
- Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
| | - Jie Cai
- Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
| | - Jingjing Xue
- Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
| | - Xiuqin Luo
- Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
| | - Wenli Zhu
- Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
| | - Xinhui Xiao
- Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
| | - Maofu Xue
- Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
| | - Feifei An
- Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China.
| | - Kaimian Li
- Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China.
| | - Songbi Chen
- Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China.
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