TY - BOOK AU - Gupta,P.K. AU - Timmis,R. TI - Mass propagation of conifer trees in liquid cultures-progress towards commercialization KW - ABA KW - ABSCISIC ACID KW - ESM-EMBRYONAL SUSPENSOR MASS KW - GA-GIBBERELLIC ACID KW - PEG-POLYETHYLENE GLYCOL N2 - At Weyerhaeuser Company, somatic embryo production in liquid medium and manufactured seed delivery has been developed to reduce labor costs and increase efficiency of mass clonal propagation. We have scaled-up embryonal suspensor masses (ESM)of Douglas-fir in 1-l liquid medium flasks. Over 10,000 somatic embryos have been produced from a single flask. We have cryostored ESM of over 700 genotypes in liquid nitrogen. Somatic embryos of Douglas-fir have also been produced from liquid medium in a bioreactor. Different types of bioreactors are required for embryo multiplication and for cotyledonary embryo development. Over 250,000 Douglas-fir somatic seedlings from a large number of enotypes have been produced for clonal field tests UR - https://drive.google.com/file/d/1GoXFxyQQRFEW3tRdn4psnC9jgyLSptTe/view?usp=drivesdk ER -