几种生化物质与辣椒抗蚜性的相关性

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

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。

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).