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Na(+)/K(+) Balance and Transport Regulatory Mechanisms in Weedy and Cultivated Rice (Oryza sativa L.) Under Salt Stress

BACKGROUND: Salinization is a primary abiotic stress constraining global plant growth and production. Weedy rice, though highly homologous to cultivated rice, is more salt tolerant during seed germination and seedling growth; we hypothesize that this is owing to ionic homeostasis and changes in the...

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Autores principales: Zhang, Yuhua, Fang, Jiapeng, Wu, Xibao, Dong, Liyao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6311050/
https://www.ncbi.nlm.nih.gov/pubmed/30594151
http://dx.doi.org/10.1186/s12870-018-1586-9
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author Zhang, Yuhua
Fang, Jiapeng
Wu, Xibao
Dong, Liyao
author_facet Zhang, Yuhua
Fang, Jiapeng
Wu, Xibao
Dong, Liyao
author_sort Zhang, Yuhua
collection PubMed
description BACKGROUND: Salinization is a primary abiotic stress constraining global plant growth and production. Weedy rice, though highly homologous to cultivated rice, is more salt tolerant during seed germination and seedling growth; we hypothesize that this is owing to ionic homeostasis and changes in the expression of genes encoding ion transport regulators. RESULTS: The four different genotypes of weedy (JYGY-1 and JYFN-4) and cultivated (Nipponbare and 9311) rice have different salt-tolerance during seed germination and seedling vegetative growth under salt stress. In this study, Na(+) and Ca(2+)content increased in weedy and cultivated rice genotypes under salt stress while K(+) and Mg(2+)decreased; however, JYGY-1 had the lowest Na(+)/K(+) ratio of assessed genotypes. Genes in the high-affinity K(+) transporter (HKT) and tonoplast sodium-hydrogen exchanger (NHX) families, and salt overly sensitive 1 (OsSOS1) have more than 98% homology in amino acid sequences between weedy and cultivated rice genotypes. Under salt stress, the HKT family members were differentially expressed in the roots and shoots of four different genotypes. However, the NHX family transcripts were markedly up-regulated in all genotypes, but there are significant differences between different genotypes. OsSOS1 was significantly up-regulated in roots, especially in JYGY-1genotype. CONCLUSIONS: The results showed that different genotypes had different germination and nutrient survival under salt stress, which was related to the difference of ion content and the difference of a series of ion transport gene expression. At the same time this study will provide new insight into the similarities and differences in ion homeostasis and gene regulatory mechanisms between weedy and cultivated rice under salt stress, which can aid in novel rice breeding and growth strategies. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12870-018-1586-9) contains supplementary material, which is available to authorized users.
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spelling pubmed-63110502019-01-07 Na(+)/K(+) Balance and Transport Regulatory Mechanisms in Weedy and Cultivated Rice (Oryza sativa L.) Under Salt Stress Zhang, Yuhua Fang, Jiapeng Wu, Xibao Dong, Liyao BMC Plant Biol Research Article BACKGROUND: Salinization is a primary abiotic stress constraining global plant growth and production. Weedy rice, though highly homologous to cultivated rice, is more salt tolerant during seed germination and seedling growth; we hypothesize that this is owing to ionic homeostasis and changes in the expression of genes encoding ion transport regulators. RESULTS: The four different genotypes of weedy (JYGY-1 and JYFN-4) and cultivated (Nipponbare and 9311) rice have different salt-tolerance during seed germination and seedling vegetative growth under salt stress. In this study, Na(+) and Ca(2+)content increased in weedy and cultivated rice genotypes under salt stress while K(+) and Mg(2+)decreased; however, JYGY-1 had the lowest Na(+)/K(+) ratio of assessed genotypes. Genes in the high-affinity K(+) transporter (HKT) and tonoplast sodium-hydrogen exchanger (NHX) families, and salt overly sensitive 1 (OsSOS1) have more than 98% homology in amino acid sequences between weedy and cultivated rice genotypes. Under salt stress, the HKT family members were differentially expressed in the roots and shoots of four different genotypes. However, the NHX family transcripts were markedly up-regulated in all genotypes, but there are significant differences between different genotypes. OsSOS1 was significantly up-regulated in roots, especially in JYGY-1genotype. CONCLUSIONS: The results showed that different genotypes had different germination and nutrient survival under salt stress, which was related to the difference of ion content and the difference of a series of ion transport gene expression. At the same time this study will provide new insight into the similarities and differences in ion homeostasis and gene regulatory mechanisms between weedy and cultivated rice under salt stress, which can aid in novel rice breeding and growth strategies. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12870-018-1586-9) contains supplementary material, which is available to authorized users. BioMed Central 2018-12-29 /pmc/articles/PMC6311050/ /pubmed/30594151 http://dx.doi.org/10.1186/s12870-018-1586-9 Text en © The Author(s). 2018 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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Zhang, Yuhua
Fang, Jiapeng
Wu, Xibao
Dong, Liyao
Na(+)/K(+) Balance and Transport Regulatory Mechanisms in Weedy and Cultivated Rice (Oryza sativa L.) Under Salt Stress
title Na(+)/K(+) Balance and Transport Regulatory Mechanisms in Weedy and Cultivated Rice (Oryza sativa L.) Under Salt Stress
title_full Na(+)/K(+) Balance and Transport Regulatory Mechanisms in Weedy and Cultivated Rice (Oryza sativa L.) Under Salt Stress
title_fullStr Na(+)/K(+) Balance and Transport Regulatory Mechanisms in Weedy and Cultivated Rice (Oryza sativa L.) Under Salt Stress
title_full_unstemmed Na(+)/K(+) Balance and Transport Regulatory Mechanisms in Weedy and Cultivated Rice (Oryza sativa L.) Under Salt Stress
title_short Na(+)/K(+) Balance and Transport Regulatory Mechanisms in Weedy and Cultivated Rice (Oryza sativa L.) Under Salt Stress
title_sort na(+)/k(+) balance and transport regulatory mechanisms in weedy and cultivated rice (oryza sativa l.) under salt stress
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6311050/
https://www.ncbi.nlm.nih.gov/pubmed/30594151
http://dx.doi.org/10.1186/s12870-018-1586-9
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