study on the physiological mechanism of tissue tolerance in the salinity tolerance in rice

2015 Fiscal Year Final Research Report

• Project/Area Number: 25292012
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Crop production science
• Research Institution: Nagoya University
• Principal Investigator: MITSUYA Shiro 名古屋大学, 生命農学研究科, 助教 (70432250)
• Co-Investigator(Renkei-kenkyūsha): YAMANE Koji 近畿大学, 農学部, 講師 (50580859)
• Research Collaborator: KOIKE Ryuhei ; MASUDA Etsuko ; Ismail Abdelbagi M. ; Platten J. Damien
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: イネ / 環境 / 耐塩性 / 生理機構 / 組織耐性

Outline of Final Research Achievements

The objective of the present study was to determine the impact on the growth and the mechanism (in terms of crop physiology) of tissue tolerance in the salinity tolerance of rice. New salinity tolerant rice cultivars with tissue tolerance showed better growth and less salinity-caused damages under salinized conditions in comparison to a salinity-sensitive check cultivar. However, Na+ accumulation levelin shoots of the cultivars with tissue tolerance was comparable to that of the salinity-sensitive one. It is indicated that tissue tolerance contributes to the salinity tolerance in an independent manner of salt exclusion mechanism. Also, the tissue tolerance might be related to antioxidant activity to inhibit lipid peroxidation under salinity. Within the Japanese rice cultivars used in this study, new salinity-tolerant cultivars with tissue tolerance was not screened, which indicated that the tissue tolerance can be used for improving the salinity tolerance of Japanese rice cultivars.

Free Research Field

作物生理学、植物生理学