不定根形成的物理和化学影响.pdfVIP

Trees (2010) 24:975–992 DOI 10.1007/s00468-010-0488-8 REVIEW Adventitious rooting of conifers: influence of physical and chemical factors Carla Ragonezi • Krystyna Klimaszewska • • • • ´ ´ Mario Rui Castro Monica Lima Paulo de Oliveira Maria Amely Zavattieri Received: 23 December 2009 / Revised: 22 July 2010 / Accepted: 18 August 2010 / Published online: 9 September 2010 Springer-Verlag 2010 Abstract In conifers, vegetative propagation of superior development of reliable adventitious rooting protocols for genotypes is the most direct means for making large genetic different conifer species. gains, because it allows a large proportion of genetic diversity to be captured in a single cycle of selection. There Keywords Cuttings Gymnosperms In vitro culture are two aims of vegetative propagation, namely large-scale Micropropagation Microshoots multiplication of select genotypes and production of large numbers of plants from scarce and costly seed that originates from controlled seed orchard pollinations. This can be Abbreviations achieved, in some species, either through rooted cuttings or ACC 1-Aminocyclopropane-1-carboxylic acid rooted microshoots, the latter regenerated through tissue AOA Aminooxyacetic acid culture in vitro. Thus far, both strategies have been used but ARF Adventitious root formation often achieved limited success mainly because of difficult AVG Aminoethoxyvinylglycine and inefficient rooting process. In this overview of tech- BA 6-Benzyladenine nology, we focus on the progress in defining the physical and cGMP Cyclic guanosine monophosphate chemical