Influencing factors of efficient and rapid propagation in vitro of Bromeliads SELECTION OF UDMH TOLERANT VARIANT LINES OF AN AQUATIC REED Effects of different extraction methods on volatile chemical constituents of the Elscholtzia kachinensis distributed in Guizhou Province In Vitro Induction of Tetraploid from Mature Embryos of ‘Golden Delicious’ Apple In Vitro Induction of Tetraploid from Mature Embryos of ‘Golden Delicious’ Apple Accuracy of predicting in vitro ruminal methane production in goats using  volatile fatty acids stoichiometric models. Study on NaN3 chemical induction for Oncidium in in vitro culture and RAPD screening