Two cassava promoters related to vascular expression and storage root formation

Planta
Peng ZhangWilhelm Gruissem

Abstract

Cassava ( Manihot esculenta Crantz) storage roots, organs accumulating large amounts of starch, develop from primary roots via secondary growth. The availability of promoters related to storage-root formation is a prerequisite for engineering root traits in cassava. Two cDNAs, c15 and c54, were identified from a storage-root cDNA library of cassava MCol1505 via differential screening. The transcripts of c15 and c54 were detected in storage roots but not in leaves by Northern analysis. Homology analysis of the deduced amino acid sequences showed that C15 is likely to be related to cytochrome P450 proteins, which are involved in the oxidative degradation of various compounds, while C54 may be related to Pt2L4, a cassava glutamic acid-rich protein. The promoter regions of c15 and c54 were isolated from the corresponding clones in a cassava genomic library. A 1,465-bp promoter fragment ( p15/1.5) of c15 and a 1,081-bp promoter region ( p54/1.0) of c54 were translationally fused to the uidA reporter gene, and introduced into cassava and Arabidopsis thaliana (L.) Heynh. The expression patterns of p15/1.5::uidA and p54/1.0::uidA in transgenic plants showed that both promoters are predominantly active in phloem, cambium and xylem vesse...Continue Reading

Citations

Jan 8, 2011·Plant Cell Reports·Simon E BullHervé Vanderschuren
May 5, 2006·The Proceedings of the Nutrition Society·C SautterW Gruissem
Nov 9, 2015·Journal of Plant Research·Maliwan NaconsieJarunya Narangajavana
Jun 8, 2013·Molecular Nutrition & Food Research·Cláudia Regina Batista de Souza, Luiz Joaquim Castelo Branco Carvalho
Mar 26, 2011·The Plant Journal : for Cell and Molecular Biology·Judith OwitiHervé Vanderschuren
Mar 26, 2013·Molecular Nutrition & Food Research·Keity Souza SantosFábio Fernandes Morato Castro
Nov 26, 2014·Annual Review of Plant Biology·Ingo Potrykus
Jan 5, 2005·Plant Molecular Biology·Nigel TaylorPeng Zhang
May 14, 2011·Journal of Integrative Plant Biology·Jia LiuPeng Zhang
Feb 7, 2012·Molecular Biology Reports·Sávio Pinho dos ReisCláudia Regina Batista de Souza
Jul 1, 2009·Comprehensive Reviews in Food Science and Food Safety·Julie A MontagnacSherry A Tanumihardjo

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