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Thermotolerance evaluation of Taiwan Japonica type rice cultivars at the seedling stage
BACKGROUND: The subtropical rice varieties grown in Taiwan are mainly Japonica-type rice varieties, which are grown in the southernmost- and lowest-latitude Japonica type rice cultivation area in the world. In Taiwan, seedlings that are planted either by transplanting or direct seeding in the second...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6895285/ https://www.ncbi.nlm.nih.gov/pubmed/31808006 http://dx.doi.org/10.1186/s40529-019-0277-7 |
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author | Hsuan, Ta-Ping Jhuang, Pei-Rong Wu, Wen-Chin Lur, Huu-Sheng |
author_facet | Hsuan, Ta-Ping Jhuang, Pei-Rong Wu, Wen-Chin Lur, Huu-Sheng |
author_sort | Hsuan, Ta-Ping |
collection | PubMed |
description | BACKGROUND: The subtropical rice varieties grown in Taiwan are mainly Japonica-type rice varieties, which are grown in the southernmost- and lowest-latitude Japonica type rice cultivation area in the world. In Taiwan, seedlings that are planted either by transplanting or direct seeding in the second crop will face the season with the highest temperatures during the year. High-temperature stress severely influences early rice growth and causes yield losses. With global warming deteriorating, this problem is becoming increasingly severe. This study attempted to establish a high-efficiency and time-saving screening tool for rice varieties that exhibit thermotolerance during the early growth stages and further identify good donors with better tolerance for high temperature stress from Taiwan Japonica type rice germplasm. RESULTS: During the initial germination stage, there were significantly different responses to heat stress among the different rice varieties. After the temperature induction response technique (TIR) treatment, the seedling survival rate and relative growth rate of the rice varieties under high temperature stress were significantly improved. In addition, the seedlings of the thermotolerant varieties demonstrated greater thermotolerance performance in the pot experiment as well as cell membrane stability (CMS) and cell activity (2,3,5-triphenyl-tetrazolium chloride; TTC) test results. However, the correlation between the thermotolerance of the seedlings and seeds was low. A phylogenetic dendrogram was plotted and revealed that thermotolerant genes did not concentrate in specific clusters. Furthermore, there was a non-significant correlation between the thermotolerance of the varieties and the years in which they were released. CONCLUSIONS: The temperature induction screening tool established by this study could determine the potential of each variety to adapt to high temperature stress. Additionally, thermotolerance during different growth stages (i.e., the germination, seedling, and grain maturation stages) exhibited low correlations. In this study, the varieties obtained through preliminary screening (i.e., TK14, HC56, TT30, TNG70, and TK8) exhibited outstanding thermotolerance. The screen tools and thermotolerance varieties could be valuable resources for the countries that grow Japonica type rice to apply when breeding thermotolerant varieties in the future. |
format | Online Article Text |
id | pubmed-6895285 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-68952852019-12-19 Thermotolerance evaluation of Taiwan Japonica type rice cultivars at the seedling stage Hsuan, Ta-Ping Jhuang, Pei-Rong Wu, Wen-Chin Lur, Huu-Sheng Bot Stud Original Article BACKGROUND: The subtropical rice varieties grown in Taiwan are mainly Japonica-type rice varieties, which are grown in the southernmost- and lowest-latitude Japonica type rice cultivation area in the world. In Taiwan, seedlings that are planted either by transplanting or direct seeding in the second crop will face the season with the highest temperatures during the year. High-temperature stress severely influences early rice growth and causes yield losses. With global warming deteriorating, this problem is becoming increasingly severe. This study attempted to establish a high-efficiency and time-saving screening tool for rice varieties that exhibit thermotolerance during the early growth stages and further identify good donors with better tolerance for high temperature stress from Taiwan Japonica type rice germplasm. RESULTS: During the initial germination stage, there were significantly different responses to heat stress among the different rice varieties. After the temperature induction response technique (TIR) treatment, the seedling survival rate and relative growth rate of the rice varieties under high temperature stress were significantly improved. In addition, the seedlings of the thermotolerant varieties demonstrated greater thermotolerance performance in the pot experiment as well as cell membrane stability (CMS) and cell activity (2,3,5-triphenyl-tetrazolium chloride; TTC) test results. However, the correlation between the thermotolerance of the seedlings and seeds was low. A phylogenetic dendrogram was plotted and revealed that thermotolerant genes did not concentrate in specific clusters. Furthermore, there was a non-significant correlation between the thermotolerance of the varieties and the years in which they were released. CONCLUSIONS: The temperature induction screening tool established by this study could determine the potential of each variety to adapt to high temperature stress. Additionally, thermotolerance during different growth stages (i.e., the germination, seedling, and grain maturation stages) exhibited low correlations. In this study, the varieties obtained through preliminary screening (i.e., TK14, HC56, TT30, TNG70, and TK8) exhibited outstanding thermotolerance. The screen tools and thermotolerance varieties could be valuable resources for the countries that grow Japonica type rice to apply when breeding thermotolerant varieties in the future. Springer Berlin Heidelberg 2019-12-05 /pmc/articles/PMC6895285/ /pubmed/31808006 http://dx.doi.org/10.1186/s40529-019-0277-7 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 Hsuan, Ta-Ping Jhuang, Pei-Rong Wu, Wen-Chin Lur, Huu-Sheng Thermotolerance evaluation of Taiwan Japonica type rice cultivars at the seedling stage |
title | Thermotolerance evaluation of Taiwan Japonica type rice cultivars at the seedling stage |
title_full | Thermotolerance evaluation of Taiwan Japonica type rice cultivars at the seedling stage |
title_fullStr | Thermotolerance evaluation of Taiwan Japonica type rice cultivars at the seedling stage |
title_full_unstemmed | Thermotolerance evaluation of Taiwan Japonica type rice cultivars at the seedling stage |
title_short | Thermotolerance evaluation of Taiwan Japonica type rice cultivars at the seedling stage |
title_sort | thermotolerance evaluation of taiwan japonica type rice cultivars at the seedling stage |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6895285/ https://www.ncbi.nlm.nih.gov/pubmed/31808006 http://dx.doi.org/10.1186/s40529-019-0277-7 |
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