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Ren ZW, Kopittke PM, Zhao FJ, Wang P. Nutrient accumulation and transcriptome patterns during grain development in rice. J Exp Bot 2023; 74:909-930. [PMID: 36272142 PMCID: PMC9899419 DOI: 10.1093/jxb/erac426] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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: 07/03/2022] [Accepted: 10/21/2022] [Indexed: 06/13/2023]
Abstract
Rice is an important source of calories and mineral nutrients for more than half of the world's population. The accumulation of essential and toxic mineral elements in rice grain affects its nutritional quality and safety. However, the patterns and processes by which different elements progressively accumulate during grain filling remain largely unknown. In the present study, we investigated temporal changes in dry matter, elemental concentrations, and the transcriptome in the grain of field-grown rice. We also investigated the effects of seed setting rate and the position of the grain within the rice panicle on element accumulation. Three different patterns of accumulation were observed: (i) elements including K, Mn, B, and Ca showed an early accumulation pattern; (ii) dry matter and elements including N, P, S, Mg, Cu, Zn, Mo, As, and Cd showed a mid accumulation pattern; and (iii) elements such as Fe showed a gradual increase pattern. These different accumulation patterns can be explained by the differences in the biogeochemical behavior of the various elements in the soil, as well as differences in plant nutrient redistribution, gene expression, and the sink-source relationship. These results improve our knowledge of the dynamics of elemental accumulation in rice grain and are helpful for identification of functional genes mediating the translocation of elements to grain.
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Affiliation(s)
- Zi-Wen Ren
- State Key Laboratory of Crop Genetics and Germplasm Enhancement and Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Centre for Agriculture and Health, Academy for Advanced Interdisciplinary Studies, Nanjing Agricultural University, Nanjing 210095, China
| | - Peter M Kopittke
- The University of Queensland, School of Agriculture and Food Sciences, St Lucia, Queensland, 4072, Australia
| | - Fang-Jie Zhao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement and Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
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Ren Y, Huang Z, Jiang H, Wang Z, Wu F, Xiong Y, Yao J. A heat stress responsive NAC transcription factor heterodimer plays key roles in rice grain filling. J Exp Bot 2021; 72:2947-2964. [PMID: 33476364 DOI: 10.1093/jxb/erab027] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 01/19/2021] [Indexed: 05/10/2023]
Abstract
High temperature often leads to failure of grain filling in rice (Oryza sativa) causing yield loss, but the underlying mechanisms are still not elucidated. Here, we report that two genes encoding seed-specific NAM/ATAF/CUC (NAC) domain transcription factors, ONAC127 and ONAC129, are responsive to heat stress and involved in the grain filling process of rice. ONAC127 and ONAC129 are dominantly expressed in the pericarp and can form a heterodimer during rice grain filling. CRISPR/Cas9 induced mutants and overexpression lines were then generated to investigate the function of these two transcription factors. Interestingly, both knock-out and overexpression plants showed incomplete grain filling and shrunken grains, which became more severe under heat stress. Transcriptome analysis revealed that ONAC127 and ONAC129 mainly regulate stimulus response and nutrient transport. ChIP-seq analysis identified that the direct target genes of ONAC127 and ONAC129 in developing rice seeds include monosaccharide transporter gene OsMST6, sugar transporter gene OsSWEET4, calmodulin-like protein gene OsMSR2 and AP2/ERF factor gene OsEATB. These results suggest that ONAC127 and ONAC129 regulate grain filling by affecting sugar transportation and abiotic stress responses. Overall, this study demonstrates a transcriptional regulatory network with ONAC127 and ONAC129 coordinating multiple pathways to modulate seed development and heat stress responses at rice reproductive stages.
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Affiliation(s)
- Ye Ren
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Zhouquan Huang
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Hao Jiang
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Zhuo Wang
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Fengsheng Wu
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yufei Xiong
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jialing Yao
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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Ouyang N, Sun X, Tan Y, Sun Z, Yu D, Liu H, Liu C, Liu L, Jin L, Zhao B, Yuan D, Duan M. Senescence-Specific Expression of RAmy1A Accelerates Non-structural Carbohydrate Remobilization and Grain Filling in Rice ( Oryza sativa L.). Front Plant Sci 2021; 12:647574. [PMID: 33986763 PMCID: PMC8111089 DOI: 10.3389/fpls.2021.647574] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 03/30/2021] [Indexed: 05/04/2023]
Abstract
Remobilization of pre-anthesis NSCs (non-structural carbohydrates) is significant for effective grain filling in rice (Oryza sativa L.). However, abundant starch particles as an important component of NSCs are still present in the leaf sheath and stem at the late stage of grain filling. There are no studies on how bioengineering techniques can be used to improve the efficiency of NSC remobilization. In this study, RAmy1A was expressed under the senescence-specific promoter of SAG12, which was designed to degrade starch in the leaf sheath and stem during grain filling. RAmy1A mRNA successfully accumulated in the leaf, stem, and sheath of transgenic plants after anthesis. At the same time, the starch and total soluble sugar content in the leaf, stem, and leaf sheath were obviously decreased during the grain-filling period. The photosynthetic rate of transgenic lines was higher than that of the wild types by an average of 4.0 and 9.9%, at 5 and 10 days after flowering, respectively. In addition, the grain-filling rate of transgenic lines was faster than that of the wild types by an average of 26.09%. These results indicate an enhanced transport efficiency of NSCs from source tissues in transgenic rice. Transgenic rice also displayed accelerated leaf senescence, which was hypothesized to contribute to decreased grain weight.
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Affiliation(s)
- Ning Ouyang
- Longping Branch of Graduate School, Hunan University, Changsha, China
- College of Agronomy, Hunan Agricultural University, Changsha, China
| | - Xuewu Sun
- College of Agronomy, Hunan Agricultural University, Changsha, China
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
| | - Yanning Tan
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
| | - Zhizhong Sun
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
| | - Dong Yu
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
| | - Hai Liu
- College of Agronomy, Hunan Agricultural University, Changsha, China
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
| | - Citao Liu
- College of Agronomy, Hunan Agricultural University, Changsha, China
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
| | - Ling Liu
- Longping Branch of Graduate School, Hunan University, Changsha, China
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
| | - Lu Jin
- College of Agronomy, Hunan Agricultural University, Changsha, China
| | - Bingran Zhao
- Longping Branch of Graduate School, Hunan University, Changsha, China
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
| | - Dingyang Yuan
- Longping Branch of Graduate School, Hunan University, Changsha, China
- College of Agronomy, Hunan Agricultural University, Changsha, China
- State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha, China
- Dingyang Yuan
| | - Meijuan Duan
- Longping Branch of Graduate School, Hunan University, Changsha, China
- College of Agronomy, Hunan Agricultural University, Changsha, China
- *Correspondence: Meijuan Duan
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