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Physiological responses under drought stress of improved drought- Tolerant rice lines and their parents
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Metadata
Document Title
Physiological responses under drought stress of improved drought- Tolerant rice lines and their parents
Author
Larkunthod P., Nounjan N., Siangliw J.L., Toojinda T., Sanitchon J., Jongdee B., Theerakulpisut P.
Name from Authors Collection
Affiliations
Khon Kaen University, Faculty of Science, Department of Biology, Salt-tolerant Rice Research Group, Khon Kaen, 40002, Thailand; Rice Gene Discovery Unit, BIOTEC, NSTDA, Kasetsart University, Kamphangsaen, Nakhon Pathom, 73140, Thailand; Plant Biotechnology Research Unit, BIOTEC, NSTDA, 113 Thailand Science Park, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand; Khon Kaen University, Faculty of Agriculture, Department of Plant Science and Agricultural Resources, Khon Kaen, 40002, Thailand
Type
Article
Source Title
Notulae Botanicae Horti Agrobotanici Cluj-Napoca
ISSN
0255965X
Year
2018
Volume
46
Issue
2
Page
679-687
Open Access
Gold
Publisher
Academic Press
DOI
10.15835/nbha46211188
Abstract
Many of the economically important rice cultivars including 'Khao Dawk Mali 105' (KDML105) or jasmine rice, one of the world's famous rice exported from Thailand suffers from drought due to erratic rainfalls and limited irrigation. To improve drought tolerance and reserve genetic background of KDML105, chromosome segment substitution lines (CSSL) containing drought tolerant quantitative trait loci (DT-QTL) has been previously developed by backcrossing between KDML105 and drought tolerant donor, IR58586-F2-CA-143 (DH212). To understand the physiological responses related to drought tolerance in CSSL lines compared to parents, two CSSLs namely CSSL1-16 and CSSL1-18, respectively were used in this study. Twenty-one-d-old hydroponically grown plants were subjected to 20% PEG for 0, 7, 14 d and then recovered from stress for 3 d. The results indicated that CSSL lines especially, CSSL1-16 showed better performance under drought stress compared to their recurrent parent. Drought tolerance superior CSSL1-16 line was indicated by high water status (high relative water content and leaf water potential), good osmotic adjustment, high proline and greater membrane stability. Moreover, this line was able to resume growth after stress recovery whereas other lines/cultivar could not recover. Similarly, drought tolerant donor showed high water status suggesting that well-maintained plant water status was associated with drought tolerant trait. It could be concluded that the highest drought tolerant line was CSSL1-16 followed by DH212, CSSL1-18 and KDML105. It would be interesting to go further into introgressed section in CSSL1-16 to identify potential candidate genes in DT-QTL for breeding drought tolerant rice in the future. © 2018 Academic Press.
License
CC BY
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Author
Publication Source
Scopus