关键词: 烟草, 烟草, 叶绿素, 类胡萝卜素, 品质

Abstract:

Cultivate plants flowering gentian was selected to inoculate gentian spot blight pathogen, and then was to placed inside the insulation moisture greenhouse to cultivate every certain period of time, sampling, fixed, film, microscope observation of disease and pathogen morphology Change. The results showed that pathogen conidia germination germ tube after the invasion from pore to complete the required invasive 12h ~ 48h, the 10d show symptoms around, 16d browser ripe conidia; host bacteria cause symptoms of infection, the mycelium from the Under surface of leaf across the mesophyll cells, in thin-walled small positive inter-leaf assembly, and finally the formation of conidia, and conidia generated subepidermal parenchyma cells in between, a certain randomness.