tailieunhanh - báo cáo khoa học: " Dominance induction of fruitlet shedding in Malus × domestica (L. Borkh): molecular changes associated with polar auxin transport"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Dominance induction of fruitlet shedding in Malus × domestica (L. Borkh): molecular changes associated with polar auxin transport | BMC Plant Biology BioMed Central Open Access Research article Dominance induction of fruitlet shedding in Malus X domestica L. Borkh molecular changes associated with polar auxin transport Valeriano Dal Cin 1 3 Riccardo Velasco2 and Angelo Ramina1 Address Department of Environmental Agronomy and Crop Science University of Padova Viale dell Universita 16 35020 Legnaro Padova Italy Experimental Institute for Agriculture via Mach 2 San Michele all Adige 38010 Trento Italy and 3Horticultural Sciences University of Florida Gainesville PO Box 116090 USA Email Valeriano Dal Cin - vdalcin@ Riccardo Velasco - Angelo Ramina - Corresponding author Published 26 November 2009 Received 17 June 2009 BMC Plant Biology 2009 9 139 doi 1471 -2229-9-139 Accepted 26 November 2009 This article is available from http 1471-2229 9 139 2009 Dal Cin et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Apple fruitlet abscission is induced by dominance a process in which hormones such as auxin cytokinins and strigolactone play a pivotal role. The response to these hormones is controlled by transcription regulators such as Aux IAA and ARR whereas auxin transport is controlled by influx and efflux carriers. Results Seven partial clones encoding auxin efflux carriers MdPIN1_A MdPIN1_B MdPIN10_A MdPIN10_B MdPIN4 MdPIN7_A and MdPIN7_B three encoding auxin influx carriers MdLAXI MdLAX2 and MdLAX3 and three encoding type A ARR cytokinin response regulators MdARR3 MdARR4 and MdARR6 were isolated by the use of degenerate primers. The organization of the PIN multigene family in apple is closer to Medicago truncatula than to Arabidopsis thaliana. The genes .