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The Inferior Grain Filling Initiation Promotes the Source Strength of Rice Leaves
Poor grain-filling initiation in inferior spikelets severely impedes rice yield improvement, while photo-assimilates from source leaves can greatly stimulate the initiation of inferior grain-filling (sink). To investigate the underlying mechanism of source-sink interaction, a two-year field experime...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer US
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10505135/ https://www.ncbi.nlm.nih.gov/pubmed/37715876 http://dx.doi.org/10.1186/s12284-023-00656-x |
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author | Jiang, Zhengrong Yang, Hongyi Zhu, Meichen Wu, Longmei Yan, Feiyu Qian, Haoyu He, Wenjun Liu, Dun Chen, Hong Chen, Lin Ding, Yanfeng Sakr, Soulaiman Li, Ganghua |
author_facet | Jiang, Zhengrong Yang, Hongyi Zhu, Meichen Wu, Longmei Yan, Feiyu Qian, Haoyu He, Wenjun Liu, Dun Chen, Hong Chen, Lin Ding, Yanfeng Sakr, Soulaiman Li, Ganghua |
author_sort | Jiang, Zhengrong |
collection | PubMed |
description | Poor grain-filling initiation in inferior spikelets severely impedes rice yield improvement, while photo-assimilates from source leaves can greatly stimulate the initiation of inferior grain-filling (sink). To investigate the underlying mechanism of source-sink interaction, a two-year field experiment was conducted in 2019 and 2020 using two large-panicle rice cultivars (CJ03 and W1844). The treatments included intact panicles and partial spikelet removal. These two cultivars showed no significant difference in the number of spikelets per panicle. However, after removing spikelet, W1844 showed higher promotion on 1000-grain weight and seed-setting rate than CJ03, particularly for inferior spikelets. The reason was that the better sink activity of W1844 led to a more effective initiation of inferior grain-filling compared to CJ03. The inferior grain weight of CJ03 and W1844 did not show a significant increase until 8 days poster anthesis (DPA), which follows a similar pattern to the accumulation of photo-assimilates in leaves. After removing spikelets, the source leaves of W1844 exhibited lower photosynthetic inhibition compared to CJ03, as well as stronger metabolism and transport of photo-assimilates. Although T6P levels remained constant in both cultivars under same conditions, the source leaves of W1844 showed notable downregulation of SnRK1 activity and upregulation of phytohormones (such as abscisic acid, cytokinins, and auxin) after removing spikelets. Hence, the high sink strength of inferior spikelets plays a role in triggering the enhancement of source strength in rice leaves, thereby fulfilling grain-filling initiation demands. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12284-023-00656-x. |
format | Online Article Text |
id | pubmed-10505135 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Springer US |
record_format | MEDLINE/PubMed |
spelling | pubmed-105051352023-09-18 The Inferior Grain Filling Initiation Promotes the Source Strength of Rice Leaves Jiang, Zhengrong Yang, Hongyi Zhu, Meichen Wu, Longmei Yan, Feiyu Qian, Haoyu He, Wenjun Liu, Dun Chen, Hong Chen, Lin Ding, Yanfeng Sakr, Soulaiman Li, Ganghua Rice (N Y) Research Poor grain-filling initiation in inferior spikelets severely impedes rice yield improvement, while photo-assimilates from source leaves can greatly stimulate the initiation of inferior grain-filling (sink). To investigate the underlying mechanism of source-sink interaction, a two-year field experiment was conducted in 2019 and 2020 using two large-panicle rice cultivars (CJ03 and W1844). The treatments included intact panicles and partial spikelet removal. These two cultivars showed no significant difference in the number of spikelets per panicle. However, after removing spikelet, W1844 showed higher promotion on 1000-grain weight and seed-setting rate than CJ03, particularly for inferior spikelets. The reason was that the better sink activity of W1844 led to a more effective initiation of inferior grain-filling compared to CJ03. The inferior grain weight of CJ03 and W1844 did not show a significant increase until 8 days poster anthesis (DPA), which follows a similar pattern to the accumulation of photo-assimilates in leaves. After removing spikelets, the source leaves of W1844 exhibited lower photosynthetic inhibition compared to CJ03, as well as stronger metabolism and transport of photo-assimilates. Although T6P levels remained constant in both cultivars under same conditions, the source leaves of W1844 showed notable downregulation of SnRK1 activity and upregulation of phytohormones (such as abscisic acid, cytokinins, and auxin) after removing spikelets. Hence, the high sink strength of inferior spikelets plays a role in triggering the enhancement of source strength in rice leaves, thereby fulfilling grain-filling initiation demands. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12284-023-00656-x. Springer US 2023-09-16 /pmc/articles/PMC10505135/ /pubmed/37715876 http://dx.doi.org/10.1186/s12284-023-00656-x Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Research Jiang, Zhengrong Yang, Hongyi Zhu, Meichen Wu, Longmei Yan, Feiyu Qian, Haoyu He, Wenjun Liu, Dun Chen, Hong Chen, Lin Ding, Yanfeng Sakr, Soulaiman Li, Ganghua The Inferior Grain Filling Initiation Promotes the Source Strength of Rice Leaves |
title | The Inferior Grain Filling Initiation Promotes the Source Strength of Rice Leaves |
title_full | The Inferior Grain Filling Initiation Promotes the Source Strength of Rice Leaves |
title_fullStr | The Inferior Grain Filling Initiation Promotes the Source Strength of Rice Leaves |
title_full_unstemmed | The Inferior Grain Filling Initiation Promotes the Source Strength of Rice Leaves |
title_short | The Inferior Grain Filling Initiation Promotes the Source Strength of Rice Leaves |
title_sort | inferior grain filling initiation promotes the source strength of rice leaves |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10505135/ https://www.ncbi.nlm.nih.gov/pubmed/37715876 http://dx.doi.org/10.1186/s12284-023-00656-x |
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