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Identification of GPAT acyltransferases in cork oak

BMC Proceedings
Springer (Biomed Central Ltd.)
Publication Date
DOI: 10.1186/1753-6561-5-s7-p69
  • Poster Presentation
  • Biology


Identification of GPAT acyltransferases in cork oak POSTER PRESENTATION Open Access Identification of GPAT acyltransferases in cork oak Liliana Marum*, Andreia Miguel, Pinto C Ricardo, Célia Miguel From IUFRO Tree Biotechnology Conference 2011: From Genomes to Integration and Delivery Arraial d Ajuda, Bahia, Brazil. 26 June - 2 July 2011 Background Acyltransferases are enzymes with an important role in the synthesis of both cutin and suberin which are part of the lipophilic barriers, such as epidermis and peri- derm that protect terrestrial plants against water loss and other external aggressions. During secondary growth in woody plants such as cork oak (Quercus suber L.), the epidermis is replaced by a suberized periderm that includes the phellem (cork), phellogen (cork cam- bium) and phelloderm tissues. In Q. suber the successive formation of phellem following removal at periodic intervals (every 9 years) allows for exploitation of cork oak on a sustainable basis. The main component of cork (45-50%) is suberin, a complex polymer comprising both aliphatic and aromatic domains and associated waxes [1,2]. Despite the physiological importance of suberin, its biosynthetic pathway as well as its deposition remains largely unknown. Since cork oak is a unique species among terrestrial plants due to its remarkable capacity for cork production, it is expected that suberin biosynthesis and deposition are tightly controlled mechanisms. As a first step to start unraveling these control mechanisms we intend to identify and characterize genes coding for the acyltransferases of the GPAT (gly- cerol-3-phosphate acyltransferase) family, involved in suberin and cutin synthesis in cork oak. Two ESTs highly similar to GPAT5 (EE 743864 and EE 743865) and one EST (EE743668) highly similar to GPAT4 shown to be strongly up-regulated in the suberin-rich phellem of cork oak tree (Q. suber) were first identified by Soler et al. [3]. Material and methods In this work, phellem tissues from small branche

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