Relationship among the nutritional components and pubescence characteristics of pepper cultivars and their resistance to Polyphagotarsonemus latus (Bank)
Abstract:To elucidate the resistance mechanism in pepper cultivars against the broad mite, Polyphagotarsonemus latus (Bank), the relationship among the density and length of leaf pubescence, the content of chlorophyll, soluble sugar, soluble protein and free amino acids in leaves of 11 pepper cultivars with their resistance to P.latus were studied using mite number ratio method. The results showed that the mite number ratio significantly negatively correlated with the density of leaf pubescence, the content of chlorophyll and soluble sugar. The correlation coefficient was -0.8455, -0.8851 and -0.6712, respectively. The mite number ratio was high significantly negatively related to the contents of free serine. The correlation coefficient was -0.829. However, the mite number ratio was not significantly related to the contents of total free amino acids and soluble protein. The results indicated that the resistance of pepper cultivars to P.latus closely related to the contents of chlorophyll, soluble sugar, free serine, as well as the density of pubescence of leaves.