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Efficiency of Sucrose to Starch Metabolism Is Related to the Initiation of Inferior Grain Filling in Large Panicle Rice

The poor grain-filling initiation often causes the poor development of inferior spikelets (IS) which limits the yield potential of large panicle rice (Oryza sativa L.). However, it remains unclear why IS often has poor grain-filling initiation. In addressing this problem, this study conducted a fiel...

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Autores principales: Jiang, Zhengrong, Chen, Qiuli, Chen, Lin, Yang, Hongyi, Zhu, Meichen, Ding, Yanfeng, Li, Weiwei, Liu, Zhenghui, Jiang, Yu, Li, Ganghua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8473919/
https://www.ncbi.nlm.nih.gov/pubmed/34589107
http://dx.doi.org/10.3389/fpls.2021.732867
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author Jiang, Zhengrong
Chen, Qiuli
Chen, Lin
Yang, Hongyi
Zhu, Meichen
Ding, Yanfeng
Li, Weiwei
Liu, Zhenghui
Jiang, Yu
Li, Ganghua
author_facet Jiang, Zhengrong
Chen, Qiuli
Chen, Lin
Yang, Hongyi
Zhu, Meichen
Ding, Yanfeng
Li, Weiwei
Liu, Zhenghui
Jiang, Yu
Li, Ganghua
author_sort Jiang, Zhengrong
collection PubMed
description The poor grain-filling initiation often causes the poor development of inferior spikelets (IS) which limits the yield potential of large panicle rice (Oryza sativa L.). However, it remains unclear why IS often has poor grain-filling initiation. In addressing this problem, this study conducted a field experiment involving two large panicle rice varieties, namely CJ03 and W1844, in way of removing the superior spikelets (SS) during flowering to force enough photosynthate transport to the IS. The results of this study showed that the grain-filling initiation of SS was much earlier than the IS in CJ03 and W1844, whereas the grain-filling initiation of IS in W1844 was evidently more promoted compared with the IS of CJ03 by removing spikelets. The poor sucrose-unloading ability, i.e., carbohydrates contents, the expression patterns of OsSUTs, and activity of CWI, were highly improved in IS of CJ03 and W1844 by removing spikelets. However, there was a significantly higher rise in the efficiency of sucrose to starch metabolism, i.e., the expression patterns of OsSUS4 and OsAGPL1 and activities of SuSase and AGPase, for IS of W1844 than that of CJ03. Removing spikelets also led to the changes in sugar signaling of T6P and SnRK1 level. These changes might be related to the regulation of sucrose to starch metabolism. The findings of this study suggested that poor sucrose-unloading ability delays the grain-filling initiation of IS. Nonetheless, the efficiency of sucrose to starch metabolism is also strongly linked with the grain-filling initiation of IS.
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spelling pubmed-84739192021-09-28 Efficiency of Sucrose to Starch Metabolism Is Related to the Initiation of Inferior Grain Filling in Large Panicle Rice Jiang, Zhengrong Chen, Qiuli Chen, Lin Yang, Hongyi Zhu, Meichen Ding, Yanfeng Li, Weiwei Liu, Zhenghui Jiang, Yu Li, Ganghua Front Plant Sci Plant Science The poor grain-filling initiation often causes the poor development of inferior spikelets (IS) which limits the yield potential of large panicle rice (Oryza sativa L.). However, it remains unclear why IS often has poor grain-filling initiation. In addressing this problem, this study conducted a field experiment involving two large panicle rice varieties, namely CJ03 and W1844, in way of removing the superior spikelets (SS) during flowering to force enough photosynthate transport to the IS. The results of this study showed that the grain-filling initiation of SS was much earlier than the IS in CJ03 and W1844, whereas the grain-filling initiation of IS in W1844 was evidently more promoted compared with the IS of CJ03 by removing spikelets. The poor sucrose-unloading ability, i.e., carbohydrates contents, the expression patterns of OsSUTs, and activity of CWI, were highly improved in IS of CJ03 and W1844 by removing spikelets. However, there was a significantly higher rise in the efficiency of sucrose to starch metabolism, i.e., the expression patterns of OsSUS4 and OsAGPL1 and activities of SuSase and AGPase, for IS of W1844 than that of CJ03. Removing spikelets also led to the changes in sugar signaling of T6P and SnRK1 level. These changes might be related to the regulation of sucrose to starch metabolism. The findings of this study suggested that poor sucrose-unloading ability delays the grain-filling initiation of IS. Nonetheless, the efficiency of sucrose to starch metabolism is also strongly linked with the grain-filling initiation of IS. Frontiers Media S.A. 2021-09-13 /pmc/articles/PMC8473919/ /pubmed/34589107 http://dx.doi.org/10.3389/fpls.2021.732867 Text en Copyright © 2021 Jiang, Chen, Chen, Yang, Zhu, Ding, Li, Liu, Jiang and Li. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Jiang, Zhengrong
Chen, Qiuli
Chen, Lin
Yang, Hongyi
Zhu, Meichen
Ding, Yanfeng
Li, Weiwei
Liu, Zhenghui
Jiang, Yu
Li, Ganghua
Efficiency of Sucrose to Starch Metabolism Is Related to the Initiation of Inferior Grain Filling in Large Panicle Rice
title Efficiency of Sucrose to Starch Metabolism Is Related to the Initiation of Inferior Grain Filling in Large Panicle Rice
title_full Efficiency of Sucrose to Starch Metabolism Is Related to the Initiation of Inferior Grain Filling in Large Panicle Rice
title_fullStr Efficiency of Sucrose to Starch Metabolism Is Related to the Initiation of Inferior Grain Filling in Large Panicle Rice
title_full_unstemmed Efficiency of Sucrose to Starch Metabolism Is Related to the Initiation of Inferior Grain Filling in Large Panicle Rice
title_short Efficiency of Sucrose to Starch Metabolism Is Related to the Initiation of Inferior Grain Filling in Large Panicle Rice
title_sort efficiency of sucrose to starch metabolism is related to the initiation of inferior grain filling in large panicle rice
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8473919/
https://www.ncbi.nlm.nih.gov/pubmed/34589107
http://dx.doi.org/10.3389/fpls.2021.732867
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