Effects of methyl jasmonate on the chilling tolerance of rice seedlings
1999
Hong, S.C. (Hwasung Agricultural Development and Technology Center, Hwasung (Korea Republic).) | Lee, C.W. | Song, B.H. (Chungbuk National University, Chongju (Korea Republic). Department of Agronomy, College of Agriculture)
This study was conducted to examine the effects of methyl jamonate(MeJA) on the chilling tolerance of rice seedlings. Two rice cultivars(Oryza sativa. L.), Dasanbyeo developed by crossing Indica*Japonica and Seojinbyeo of Japonica, which have shown different growth characteristics were used. The seedlings were grown with two different temperatures of 5/5 degrees centigrade and 25/20 degrees centigrade(day/night) to investigate the growth and physiological responses of rice seedlings. Plant heights of Dasanbyeo and Seojinbyeo were higher with treatment of MeJA at both temperatures of 5/5 degrees centigrade and 25/20 degrees centigrade than those with the control. Number of leaves of Dasanbyeo and Seojinbyeo cultivated at 5/5 degrees centigrade was not significantly different with treatment of MeJA, while it at 25/20 degrees centigrade was a little more with treatment of MeJA than those of the control. Dry matter weights of Dasanbyeo and Seojinbyeo grown with treatment of MeJA were increased at 5/5 degrees centigrade and 25/20 degrees centigrade. Electrolyte leakage of two rice varieties was much higher with 5/5 degrees centigrade than that with 25/20 degrees centigrade. Also, the electolyte leakage was clearly reduced with treatment of MeJA. Survival ratio of Dasanbyeo with treatment of 1 micro mole MeJA at 5/5 degrees centigrade was higher about 80.3% than that of the control about 75.3%. The correlation coeffiecint was significantly negative in between dry matter weight and electrolyte leakage. The correlation coefficient between total nitrogen content and dry matter weight was negative, whereas the relationship between nitrogen content and electrolyte leakage was positive.
Afficher plus [+] Moins [-]Mots clés AGROVOC
Informations bibliographiques
Cette notice bibliographique a été fournie par Korea Agricultural Science Digital Library
Découvrez la collection de ce fournisseur de données dans AGRIS