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The Initiation of Inferior Grain Filling is Affected by Sugar Translocation Efficiency in Large Panicle Rice
BACKGROUND: Large panicle rice has a large sink capacity, but inferior spikelet filling is poor in this variety of rice due to asynchronous grain filling. The understanding of the factors that cause asynchronous grain filling will help to propose a model for how to regulate the rice inferior spikele...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer US
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6794335/ https://www.ncbi.nlm.nih.gov/pubmed/31617022 http://dx.doi.org/10.1186/s12284-019-0333-7 |
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author | Chen, Lin Deng, Yao Zhu, Honglei Hu, Yuxiang Jiang, Zhengrong Tang, She Wang, Shaohua Ding, Yanfeng |
author_facet | Chen, Lin Deng, Yao Zhu, Honglei Hu, Yuxiang Jiang, Zhengrong Tang, She Wang, Shaohua Ding, Yanfeng |
author_sort | Chen, Lin |
collection | PubMed |
description | BACKGROUND: Large panicle rice has a large sink capacity, but inferior spikelet filling is poor in this variety of rice due to asynchronous grain filling. The understanding of the factors that cause asynchronous grain filling will help to propose a model for how to regulate the rice inferior spikelets grain filling. RESULTS: In this study, two large panicle rice varieties, W1844 and CJ03, with the same sink capacity but with differences in asynchronous grain filling were used. The difference in the grain filling rate between superior and inferior spikelets in W1844 was much smaller than that in CJ03. We found that superior spikelet filling was initiated earlier in W1844 than in CJ03. The source-to-sink translocation rate of sucrose during the grain filling stage was more efficient in W1844 than in CJ03, and the gene expression levels of sucrose transporters (OsSUTs) were higher in W1844 functional leaves than in those of CJ03. In addition, carbon output, the transport ratio, and the contribution rate from the stem and sheath to the panicle were much higher at the early filling stage than at later filling stages in W1844. CONCLUSION: Efficient sugar translocation can satisfy high sink strength, and also the strong sink activity can facilitate the sugar unloading in spikelets. All the above results indicate that an efficient sugar translocation rate at the early grain filling stage can improve sink strength and inferior grain filling initiation. Strategies to limit asynchronous grain filling in rice were also discussed based on our findings. |
format | Online Article Text |
id | pubmed-6794335 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Springer US |
record_format | MEDLINE/PubMed |
spelling | pubmed-67943352019-10-17 The Initiation of Inferior Grain Filling is Affected by Sugar Translocation Efficiency in Large Panicle Rice Chen, Lin Deng, Yao Zhu, Honglei Hu, Yuxiang Jiang, Zhengrong Tang, She Wang, Shaohua Ding, Yanfeng Rice (N Y) Original Article BACKGROUND: Large panicle rice has a large sink capacity, but inferior spikelet filling is poor in this variety of rice due to asynchronous grain filling. The understanding of the factors that cause asynchronous grain filling will help to propose a model for how to regulate the rice inferior spikelets grain filling. RESULTS: In this study, two large panicle rice varieties, W1844 and CJ03, with the same sink capacity but with differences in asynchronous grain filling were used. The difference in the grain filling rate between superior and inferior spikelets in W1844 was much smaller than that in CJ03. We found that superior spikelet filling was initiated earlier in W1844 than in CJ03. The source-to-sink translocation rate of sucrose during the grain filling stage was more efficient in W1844 than in CJ03, and the gene expression levels of sucrose transporters (OsSUTs) were higher in W1844 functional leaves than in those of CJ03. In addition, carbon output, the transport ratio, and the contribution rate from the stem and sheath to the panicle were much higher at the early filling stage than at later filling stages in W1844. CONCLUSION: Efficient sugar translocation can satisfy high sink strength, and also the strong sink activity can facilitate the sugar unloading in spikelets. All the above results indicate that an efficient sugar translocation rate at the early grain filling stage can improve sink strength and inferior grain filling initiation. Strategies to limit asynchronous grain filling in rice were also discussed based on our findings. Springer US 2019-10-15 /pmc/articles/PMC6794335/ /pubmed/31617022 http://dx.doi.org/10.1186/s12284-019-0333-7 Text en © The Author(s). 2019 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
spellingShingle | Original Article Chen, Lin Deng, Yao Zhu, Honglei Hu, Yuxiang Jiang, Zhengrong Tang, She Wang, Shaohua Ding, Yanfeng The Initiation of Inferior Grain Filling is Affected by Sugar Translocation Efficiency in Large Panicle Rice |
title | The Initiation of Inferior Grain Filling is Affected by Sugar Translocation Efficiency in Large Panicle Rice |
title_full | The Initiation of Inferior Grain Filling is Affected by Sugar Translocation Efficiency in Large Panicle Rice |
title_fullStr | The Initiation of Inferior Grain Filling is Affected by Sugar Translocation Efficiency in Large Panicle Rice |
title_full_unstemmed | The Initiation of Inferior Grain Filling is Affected by Sugar Translocation Efficiency in Large Panicle Rice |
title_short | The Initiation of Inferior Grain Filling is Affected by Sugar Translocation Efficiency in Large Panicle Rice |
title_sort | initiation of inferior grain filling is affected by sugar translocation efficiency in large panicle rice |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6794335/ https://www.ncbi.nlm.nih.gov/pubmed/31617022 http://dx.doi.org/10.1186/s12284-019-0333-7 |
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