苹果霉心病与果实结构关系的研究甘肃省天水市果树研究所呼丽萍等通过对１４个苹果品种、品系的果实剖析看出，供试品种果实的萼筒全部带菌。萼心间组织存在孔口或裂缝，呈开放状，且组织疏松的元帅系品种易感病；萼心间组织无孔口或裂缝、呈封闭状，且组织紧密的国光品种... Study on the relationship between apple mildew heart disease and fruit structureHuiliping, Tianshui Fruit Tree Research Institute of Gansu Province, etc. Through the analysis of the fruit of 14 apple varieties and lines, the calyx tube of the tested varieties was all carried with bacteria. There are holes or cracks in the calyx heart tissue, was open, and the loose Marshmallows varieties susceptible to disease; calyx heart tissue without holes or cracks, was closed, and tightly organized Guoguang species ...