Root Responses to Water Deficit under Rain-fed Lowland Rice

Authors

  • Soraya Uyprasert Department of Agronomy, Kasetsart University, Kamphangsaen Campus, Nakhon Pathom 73140, Thailand.
  • Theerayut Toojinda Rice Gene Discovery Unit, BIOTEC, National Center for Genetic Engineering and Biotechnology, Kasetsart University, Kamphangsaen Campus, Nakhon Pathom 73140, Thailand.
  • Nawarat Udomprasert Department of Agronomy, Kasetsart University, Kamphangsaen Campus, Nakhon Pathom 73140, Thailand.
  • Somvong Tragoonrung Rice Gene Discovery Unit, BIOTEC, National Center for Genetic Engineering and Biotechnology, Kasetsart University, Kamphangsaen Campus, Nakhon Pathom 73140, Thailand.
  • Apichart Vanavichit Department of Agronomy, Kasetsart University, Kamphangsaen Campus, Nakhon Pathom 73140, Thailand.

Keywords:

rice, rainfed lowland, double haploid lines, relative water content, drought

Abstract

Drought is a major problem for rice grown under rainfed lowland conditions. The ability of rice plants to tolerate drought stress is associated with root system characters. However, genetic of root traits under lowland condition was uncertain. To determine the performance of root characteristic response to drought tolerance, a total of 220 double haploid lines, their parents (CT9993 and IR62266), and three standard checks (IR20, NSG19 and KDML105) were used in the experiments. The extent of genetic variation in root characters, relative water content, visual leaf rolling and drought injury under different intensities of water deficit were determined. Genotypes with short root were more dehydration tolerant than the longer root genotype, consequently more relatively high water content and delayed leaf rolling and senescence under severe water deficit.

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Published

2004-08-30

How to Cite

Soraya Uyprasert, Theerayut Toojinda, Nawarat Udomprasert, Somvong Tragoonrung, and Apichart Vanavichit. 2004. “Root Responses to Water Deficit under Rain-Fed Lowland Rice”. Agriculture and Natural Resources 38 (4). Bangkok, Thailand:448-56. https://li01.tci-thaijo.org/index.php/anres/article/view/243193.

Issue

Vol. 38 No. 4 (2004): July-August

Section

Research Article

License

online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
production and hosting by Kasetsart University of Research and Development Institute on behalf of Kasetsart University.