几种生化物质与辣椒抗蚜性的相关性

 选用抗感程度较稳定的12 个辣椒品种, 于4~ 6 叶期对其叶组织中游离氨基酸总量、总氮量、可溶性糖、游离脯胺酸、维生素C进行了测定。试验结果表明, 抗蚜品种较感蚜品种叶组织中含有较低的游离氨基酸、氮、脯胺酸和维生素C, 较多的可溶性糖和较高的糖/ 氮比, 后者的游离氨基酸总量、总氮量、脯胺酸和维生素C 含量分别为前者的1. 1~ 2. 9 倍、1. 0~ 1. 7 倍、1. 4~ 2. 9 倍和1. 2~ 2. 6 倍, 前者的可溶性糖含量和糖/ 氮比分别为后者的1. 1~ 1. 3 倍和1. 3~ 2. 0 倍。上述结果在高抗和高感品种间差异尤为显著, 说明辣椒品种叶组织中游离氨基酸总量、总氮量、可溶性糖、游离脯胺酸、维生素C 及糖/ 氮比与辣椒抗蚜性显著相关。

A Study on the Correlation Between Several Chemical Substances and Capsicum Cultivar Resistance to Myzus persicae(Sulzer)

The Capsicum cultivars that had been showed steadily resistant to Myzus persicae( Sulzer)were used.This study was proceeded in 4-6 leaf stage to determine the contents of amino acids,nitrogen,sugar,proline and vitamin C in leaves.The results showed that the contents of amino acids,nitrogen,sugar,proline,vitamin C and the ratio of sugar and nitrogen were significant difference between resistant and susceptible cultivars.Resistant cultivars had less amino acids,nitrogen,sugar,proline and vitamin C but more sugar and high ratio of sugar and nitrogen than susceptible ones;the contents of amino acids,nitrogen,sugar,proline and vitamin C of the later were 1.1-2.9 times,1.0-1.7 times,1.4-2.9 times and 1.2-2.6 times as much as those of the former,but the contents of sugar and the ratio of sugar and nitrogen of the former were 1.1-1.3 times and 1.3-2.0 times as much as those of the later.The extremely significant difference between high resistant and high susceptible cultivars indicated that the contents of amino acids,nitrogen,sugar,proline,vitamin C and the rate of sugar and nitrogen were significantly relative to the resistance of the Capsicum cultivars to Myzus persicae ( Sulzer).