Comparison of four methods and their efficiency for total RNA extraction from leaves of pinellia ternata STUDY ON DEVELOPING PROCESS OF EMBRYO IN PINELLIA TERNATA Virus damage to Pinellia ternata and its rapid—proliferation technique for virus-free seedlings DNA Methylation of polyploid complex of Pinellia ternata by MSAP analysis Preliminary research on industrialized breeding technology system of Pinellia ternata Application of AFLP markers for analyzing genetic difference among cultivated Pinellia ternata Effects of Culture Conditions on Cell Growth and Total Alkaloid Formation in Suspension Cultures of Pinellia ternata