外源茉莉酸甲酯对隆子黑青稞籽粒灌浆特性及产量的影响OA

[Objective]To clarify the influence of exogenous methyl jasmonate on grain filling characteristics and yield of longzi black barley grain.[Method]Longzi black highland barley(six edges)was used as the test material with 0,50,100,150,200 μmol/L methyl jasmonate sprayed on the leaf surface during flowering period,marked as M1,M2,M3,M4 and M5.[Result]The spraying of a certain concentration of methyl jasmonate could improve the yield of black highland barley,and the yield of M3 treatment was the highest.Compared with M1,seed-setting rate,1 000-grain weight and yield of M3 increased by 9.80%,3.78%and 7.27%,respectively.It could be seen that methyl jas-monate had significant effect on black barley grain filling and seed-setting.Exogenous methyl jasmonate treatment could change the grain filling characteristics of black barley grain to a certain extent.Compared with M1,the maximum grouting rate of highland barley increased by 3.11%to 2.32 g/d,and the time to reach the peak point was shortened by 0.73 d on average,and the grouting duration was extended by 0.25 d.Therefore,methyl jasmonate could increase the grain fullness by improving the grain filling process.Methyl jasmonate treatment significantly improved the phenotypic traits of black barley.On the 35th day of grouting period,under M3 treatment,the grain area was 2.28%higher than M1,the grain circumference was 1.71%higher than M1,and the grain length,width and length-width ratio were 2.14%,5.14%and 1.67%higher than M1,which all showed significant differences.[Conclusion]Exogenous methyl jasmonate can effectively improve the grain filling of longzi black highland barley,and have a positive impact on the yield increase benefit.100 μmol/L methyl jasmonate treatment has the best effect on the grain filling and yield of black highland barley grain.