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Evaluating salt tolerance of twenty traditional rice varieties from Vietnam

The results showed that there are 4 out of 20 accessions presenting high salinity tolerance in term of plant growth and physiological parameters. Although known salinity tolerance-related gene was not detected, there is the apparent difference of total protein profile of highly tolerant accessions between saline and control condition. | Tạp chí Khoa học công nghệ và Thực phẩm 14 (1) (2018) 3-11 EVALUATING SALT TOLERANCE OF TWENTY TRADITIONAL RICE VARIETIES FROM VIETNAM Ho Viet The*, Nguyen Quoc Hien, Pham Ba Cuong Ho Chi Minh City University of Food Industry *Email: thehv@cntp.edu.vn Received: 5 December 2017; Accepted for publication: 7 March 2018 ABSTRACT Due to the negative effects of climate change, sea water intrusion is causing difficulties for rice production in Vietnam. Presently, there are several Vietnam rice landraces being preserved at International Rice Research Institute (IRRI) which have not been adequately characterized to utilize as breeding materials for developing rice cultivars to cope with salinity stress. In this study, total of 20 rice landraces were evaluated for salinity tolerance in NaCl 6‰ salinized solutions in three weeks. The results showed that there are 4 out of 20 accessions presenting high salinity tolerance in term of plant growth and physiological parameters. Although known salinity tolerance-related gene was not detected, there is the apparent difference of total protein profile of highly tolerant accessions between saline and control condition. The obtained results in this work could pave the way for following studies to breed new rice cultivars adapting to climate change in Vietnam. Keywords: Rice landraces, salt tolerance, Saltol, IRRI, SDS-PAGE. 1. INTRODUCTION Rice (Oryza sativa L.) is an important crop of Vietnam economy. Although it is normally grown in lowland area, rice is sensitive to salinity. Growth and development from germination to maturity of rice are seriously affected by salted condition [1]. With total of 40,000 km2, Cuu Long Delta is the largest rice production area in the country. However, approximately 40% rice growing area is negatively affected with salinity. In next 30 years, rice growing area having salinity of 4‰ will increase up to 1,605,200 ha covering 41% total region area [2]. Thus, rice production will be harder and food .