Expression Analysis of Citrate Metabolic Related Genes in Late-ripening Mutant of Navel Orange and Its Wild Type Molecular phylogeny of Colysis (Polypodiaceae) based on chloroplast rbcL and rps4-trnS sequences Regulation of saponins from Pulsatilla chinensis on energy metabolism of Bel-7402 xenograft in nude mice Taxonomic studies of the genus Colysis C. Presl (Polypodiaceae) from China and neighboring regions TAXONOMIC AND PHYTOGEOGRAPHIC STUDY ON THE SPECIES COLYSIS ELLIPTICA(THUNB.)CHING TWO NEW SPECIES OF COLYSIS FROM GUANGXI