tailieunhanh - báo cáo khoa học: " Salt tolerance in Solanum pennellii: antioxidant response and related QTL"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Salt tolerance in Solanum pennellii: antioxidant response and related QTL | Frary et al. BMC Plant Biology 2010 10 58 http 1471-2229 10 58 BMC Plant Biology RESEARCH ARTICLE Open Access Salt tolerance in Solanum pennellii antioxidant response and related QTL 1 z- 11 2 3 2 3 4 Anne Frary Deniz Gol Davut Keleậ Bilal Okmen Hasan Pinar Hasan 0 ặigva Ahmet Yemenicioglu Sami Doganlar1 Abstract Background Excessive soil salinity is an important problem for agriculture however salt tolerance is a complex trait that is not easily bred into plants. Exposure of cultivated tomato to salt stress has been reported to result in increased antioxidant content and activity. Salt tolerance of the related wild species Solanum pennellii has also been associated with similar changes in antioxidants. In this work S. lycopersicum M82 S. pennellii LA716 and a S. pennellii introgression line IL population were evaluated for growth and their levels of antioxidant activity total water-soluble antioxidant activity major antioxidant compounds phenolic and flavonoid contents and antioxidant enzyme activities superoxide dismutase catalase ascorbate peroxidase and peroxidase under both control and salt stress 150 mM NaCl conditions. These data were then used to identify quantitative trait loci QTL responsible for controlling the antioxidant parameters under both stress and nonstress conditions. Results Under control conditions cultivated tomato had higher levels of all antioxidants except superoxide dismutase than S. pennellii. However under salt stress the wild species showed greater induction of all antioxidants except peroxidase. The ILs showed diverse responses to salinity and proved very useful for the identification of QTL. Thus 125 loci for antioxidant content under control and salt conditions were detected. Eleven of the total antioxidant activity and phenolic content QTL matched loci identified in an independent study using the same population thereby reinforcing the validity of the loci. In addition the growth responses of the ILs were .