Abstract:

The objective of the present study was to investigate effects of seed priming on aged Japanica rice and explore the method for utilizing aged Japanica rice seed. Five Japanica varieties, ‘Wangyangdao’, ‘Hongmangshajing’, ‘345hao’, ‘C bao’ and ‘Xiushui79’, naturally aged for three years were primed by three different materials chitosan, sand and PEG. Five primed Japanica varieties seed vigor traits and physiological characteristics of seedling were investigated. The priming treatment for aged seed could prohibit the leakage of cell, significantly improve the germination ability, germination rate and the POD activity, and reduce the content of MDA. The significant priming effect was exited in three different primers. Chitosan priming had the best effect on aged Japanica rice seed, the second was sand priming. Chitosan priming and sand priming could increase seed vigor and improve germination.