Physiological Response to Salinity Stress of Japonica/Indica Lines Tolerant to Salt at Seedling Stage

• 발행기관: 한국육종학회
• 저자명: Jong-Cheol Ko Kyu-Seong Lee Ki-Young Kim Weon-Young Choi Bo-Kyung Kim Woon-Cheol Shin Jae-Kwon Ko Song-Joong Yum
• 간행물 정보: 『한국육종학회지』Vol.43 No.5, 391~398쪽, 전체 8쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2011.10.30

영문 초록

Physiological responses to salinity stress were evaluated in six rice genotypes differing in their tolerance to salinity at the seedling stage. Susceptible genotypes ( Dongjingbyeo , Hwayeongbyeo , and IR29 ) showed salt injury symptoms (mean 8.8) and higher visual score under salt stress than that of tolerant ones ( Pokkali , IR74009 , and IR73571 ). As salinity affects growth and physiological parameters, the six genotypes thus showed significant reduction because of salt stress. Tolerant Japonica/Indica bred lines ( IR74009 , IR73571 ) showed lower reduction, 33.9%, 34.5%, and 50%, respectively, in plant seedling height, dry shoot weight and dry root weight than those of the susceptible Japonica varieties ( Dongjingbyeo , Hwayeongbyeo ), and the highest reduction under salt stress was observed in dry root weight, followed by dry shoot weight and seedling height, respectively. Shoot Na+ concentration of IR74099 and IR73571 was lower than that of the susceptible varieties, Dongjinbyeo and Hwayeongbyeo . There were no significant differences among genotypes in root Na+ concentration. Shoot K+ concentration showed a reverse tendency compared to shoot Na+ concentration. IR74009 and IR73571 had considerably lower ratio compared to Dongjinbyeo and Hwayeongbyeo in Na+/K+ ratio of their shoot and was not different the tolerant check, Pokkali .

목차

INTRODUCTION

MATERIALS AND METHODS

RESULTS AND DISCUSSION

REFERENCES

키워드

Salinity stress Visual score Seedling height Dry shoot weight Dry root weight