Functional Analysis of hrcJ Gene in Lonsdalea quercina subsp. populi Type Ⅲ secretion system is an essential pathogenic factor in poplar canker pathogen Lonsdalea quercina Microstructure of Glandular Trichomes on Leaf Surface of Sesame and Changes of Trichome Secretions under Drought Condition Study on optimal germination condition of Thesium chinensis seeds The Enzymes in the Secretions of Pine Wood Nematode (Bursaphelenchus xylophilus) Study on optimal germination condition of Thesium chinensis seeds