Compared on Biological Characteristics in 3 Types of Jinhua Fingered Citron A New Dwarf Type of Fingered Citron Cultivar‘Qianzhi Baitai’ Semilethal Temperature of Fingered Citrons(Citrus medica var. sarcodactylis Swingle) under Low Temperature Stress and Evaluation on Their Cold Resistance A New Dwarf Type of Fingered Citron Cultivar‘Qianzhi Baitai’ Analysis of cold-regulated gene expression of the Fingered Citron(Citrus medica L. var. sarcodactylis Swingle) Effects of short term chilling stress on the photosynthetic physiology of fingered citrons (Citrus medica var. sarcodactylis Swingle) Effects of Mn ( salen ) Ⅱ on Photosynthesis and Yield of Jinhua FingeredCitron Effects of Mn ( salen ) Ⅱ on Photosynthesis and Yield of Jinhua FingeredCitron