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Guo H, Guo H, Zhang L, Tian X, Wu J, Fan Y, Li T, Gou Z, Sun Y, Gao F, Wang J, Shan G, Zeng F. Organelle Ca 2+/CAM1-SELTP confers somatic cell embryogenic competence acquisition and transformation in plant regeneration. New Phytol 2024; 242:1172-1188. [PMID: 38501463 DOI: 10.1111/nph.19679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Accepted: 02/20/2024] [Indexed: 03/20/2024]
Abstract
Somatic cell totipotency in plant regeneration represents the forefront of the compelling scientific puzzles and one of the most challenging problems in biology. How somatic embryogenic competence is achieved in regeneration remains elusive. Here, we discover uncharacterized organelle-based embryogenic differentiation processes of intracellular acquisition and intercellular transformation, and demonstrate the underlying regulatory system of somatic embryogenesis-associated lipid transfer protein (SELTP) and its interactor calmodulin1 (CAM1) in cotton as the pioneer crop for biotechnology application. The synergistic CAM1 and SELTP exhibit consistent dynamical amyloplast-plasmodesmata (PD) localization patterns but show opposite functional effects. CAM1 inhibits the effect of SELTP to regulate embryogenic differentiation for plant regeneration. It is noteworthy that callus grafting assay reflects intercellular trafficking of CAM1 through PD for embryogenic transformation. This work originally provides insight into the mechanisms responsible for embryogenic competence acquisition and transformation mediated by the Ca2+/CAM1-SELTP regulatory pathway, suggesting a principle for plant regeneration and cell/genetic engineering.
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Affiliation(s)
- Huihui Guo
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
| | - Haixia Guo
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
| | - Li Zhang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
| | - Xindi Tian
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
| | - Jianfei Wu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
| | - Yupeng Fan
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
- College of Life Sciences, Huaibei Normal University, Huaibei, 235000, China
| | - Tongtong Li
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
| | - Zhongyuan Gou
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
| | - Yuxiao Sun
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
| | - Fan Gao
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
| | - Jianjun Wang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
| | - Guangyao Shan
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
| | - Fanchang Zeng
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, 271018, China
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