Resistant starch(RS)encompasses those forms of starch which are not accessible to human digestive enzymes and are fermented in the colons producing short chain fatty acids.The plant materials containing RS are few in ...Resistant starch(RS)encompasses those forms of starch which are not accessible to human digestive enzymes and are fermented in the colons producing short chain fatty acids.The plant materials containing RS are few in the world.In this contribution,the culture ability of callus from anthers of F1 plants from,landraces,‘Zhaxima’(Oryza sativa var.indica,high-RS rice line with 7.705±0.142,g/100 g)בNanjing 46’(Oryza sativa var.japonica,rice variety with RS content(g/100 g)of 0.200±0.001 crosses were studied for obtaining high RS rice plants.The results showed that when M8 basic induction medium was added with 1.5 mg/L 2,4-D、2 mg/LNAA and 0.3 mg/L KT,the inductivity of callus was high as 32.14%for 21 d after pretreatment at 4°C for 3 d;When MS differentiation basic medium was added with 2 mg/LKT and 3 mg/L ABA,the frequency of regeneration for callus was 50.3%with only a regeneration frequency of 4.55%grown into green seedlings.The RS content in the seeds was between those of the two parents and was partially normally distributed,the highest RS contents of the regenerated plants was as high as 7.66±1.197%.This produced an efficient technology for regenerating stable rice lines with high RS and good eating quality using anthers culture.展开更多
基金supported by grants from the national key research and development plan of China(2016YFD0300501–03)the National Natural Science Foundation of China(31571585).
文摘Resistant starch(RS)encompasses those forms of starch which are not accessible to human digestive enzymes and are fermented in the colons producing short chain fatty acids.The plant materials containing RS are few in the world.In this contribution,the culture ability of callus from anthers of F1 plants from,landraces,‘Zhaxima’(Oryza sativa var.indica,high-RS rice line with 7.705±0.142,g/100 g)בNanjing 46’(Oryza sativa var.japonica,rice variety with RS content(g/100 g)of 0.200±0.001 crosses were studied for obtaining high RS rice plants.The results showed that when M8 basic induction medium was added with 1.5 mg/L 2,4-D、2 mg/LNAA and 0.3 mg/L KT,the inductivity of callus was high as 32.14%for 21 d after pretreatment at 4°C for 3 d;When MS differentiation basic medium was added with 2 mg/LKT and 3 mg/L ABA,the frequency of regeneration for callus was 50.3%with only a regeneration frequency of 4.55%grown into green seedlings.The RS content in the seeds was between those of the two parents and was partially normally distributed,the highest RS contents of the regenerated plants was as high as 7.66±1.197%.This produced an efficient technology for regenerating stable rice lines with high RS and good eating quality using anthers culture.
