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Transcriptional changes in the developing rice seeds under salt stress suggest targets for manipulating seed quality
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Lee, Choonseok, Chung, Chong-Tae, Hong, Woo-Jong, Lee, Yang-Seok, Lee, Jong-Hee, Koh, Hee-Jong and Jung, Ki-Hong (2021) Transcriptional changes in the developing rice seeds under salt stress suggest targets for manipulating seed quality. Frontiers in Plant Science, 12 . 748273. doi:10.3389/fpls.2021.748273 ISSN 1664-462X.
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Official URL: https://doi.org/10.3389/fpls.2021.748273
Abstract
Global sea-level rise, the effect of climate change, poses a serious threat to rice production owing to saltwater intrusion and the accompanying increase in salt concentration. The reclaimed lands, comprising 22.1% of rice production in Korea, now face the crisis of global sea-level rise and a continuous increase in salt concentration. Here, we investigated the relationship between the decrease in seed quality and the transcriptional changes that occur in the developing rice seeds under salt stress. Compared to cultivation on normal land, the japonica rice cultivar, Samgwang, grown on reclaimed land showed a greatly increased accumulation of minerals, including sodium, magnesium, potassium, and sulfur, in seeds and a reduced yield, delayed heading, decreased thousand grain weight, and decreased palatability and amylose content. Samgwang showed phenotypical sensitivity to salt stress in the developing seeds. Using RNA-seq technology, we therefore carried out a comparative transcriptome analysis of the developing seeds grown on reclaimed and normal lands. In the biological process category, gene ontology enrichment analysis revealed that the upregulated genes were closely associated with the metabolism of biomolecules, including amino acids, carboxylic acid, lignin, trehalose, polysaccharide, and chitin, and to stress responses. MapMan analysis revealed the involvement of upregulated genes in the biosynthetic pathways of abscisic acid and melatonin and the relationship of trehalose, raffinose, and maltose with osmotic stress. Interestingly, many seed storage protein genes encoding glutelins and prolamins were upregulated in the developing seeds under salt stress, indicating the negative effect of the increase of storage proteins on palatability. Transcription factors upregulated in the developing seeds under salt stress included, in particular, bHLH, MYB, zinc finger, and heat shock factor, which could act as potential targets for the manipulation of seed quality under salt stress. Our study aims to develop a useful reference for elucidating the relationship between seed response mechanisms and decreased seed quality under salt stress, providing potential strategies for the improvement of seed quality under salt stress.
| Item Type: | Journal Article | ||||||||||||
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| Subjects: | S Agriculture > S Agriculture (General) S Agriculture > SB Plant culture |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||||||||
| SWORD Depositor: | Library Publications Router | ||||||||||||
| Library of Congress Subject Headings (LCSH): | Rice -- Effect of salt on -- Korea (South), Rice -- Effect of stress on -- Korea (South), Rice -- Ecophysiology -- Korea (South), Rice -- Seedlings -- Ecophysiology -- Korea (South), Reclamation of land -- Korea (South), Sea level -- Korea (South) | ||||||||||||
| Journal or Publication Title: | Frontiers in Plant Science | ||||||||||||
| Publisher: | Frontiers Media S.A. | ||||||||||||
| ISSN: | 1664-462X | ||||||||||||
| Official Date: | 8 November 2021 | ||||||||||||
| Dates: |
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| Volume: | 12 | ||||||||||||
| Article Number: | 748273 | ||||||||||||
| DOI: | 10.3389/fpls.2021.748273 | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||
| Date of first compliant deposit: | 7 December 2021 | ||||||||||||
| Date of first compliant Open Access: | 8 December 2021 | ||||||||||||
| RIOXX Funder/Project Grant: |
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