Magnesium deficiency in sugar beets alters sugar partitioning and phloem loading in young mature leaves

Magnesium deficiency has been reported to affect plant growth and biomass partitioning between root and shoot. The present work aims to identify how Mg deficiency alters carbon partitioning in sugar beet (Beta vulgaris L.) plants. Fresh biomass, Mg and sugar contents were followed in diverse organs over 20days under Mg-sufficient and Mg-deficient conditions. At the end of the treatment, the aerial biomass, but not the root biomass, of Mg-deficient plants was lower compared to control plants. A clear inverse relationship between Mg and sugar contents in leaves was found. Mg deficiency promoted a marked increase in sucrose and starch accumulation in the uppermost expanded leaves, which also had the lowest content of Mg among all the leaves of the rosette. The oldest leaves maintained a higher Mg content. [14C]Sucrose labelling showed that sucrose export from the uppermost expanded leaves was inhibited. In contrast, sucrose export from the oldest leaves, which are close to, and export mainly to, the roots, was not restricted. In response to Mg deficiency, the BvSUT1 gene encoding a companion cell sucrose/H+ symporter was induced in the uppermost expanded leaves, but without further enhancement of sucrose loading into the phloem. The observed increase in BvSUT1 gene expression supports the idea that sucrose loading into the phloem is defective, resulting in its accumulation in the lea

Oryza Tag Line, a phenotypic mutant database for the Génoplante rice insertion line library

To organize data resulting from the phenotypic characterization of a library of 30 000 T-DNA enhancer trap (ET) insertion lines of rice (Oryza sativa L cv. Nipponbare), we developed the Oryza Tag Line (OTL) database (http://urgi.versailles.inra.fr/OryzaTagLine/). OTL structure facilitates forward genetic search for specific phenotypes, putatively resulting from gene disruption, and/or for GUSA or GFP reporter gene expression patterns, reflecting ET-mediated endogenous gene detection. In the latest version, OTL gathers the detailed morpho-physiological alterations observed during field evaluation and specific screens in a first set of 13 928 lines. Detection of GUS or GFP activity in specific organ/tissues in a subset of the library is also provided. Search in OTL can be achieved through trait ontology category, organ and/or developmental stage, keywords, expression of reporter gene in specific organ/tissue as well as line identification number. OTL now contains the description of 9721 mutant phenotypic traits observed in 2636 lines and 1234 GUS or GFP expression patterns. Each insertion line is documented through a generic passport data including production records, seed stocks and FST information. 8004 and 6101 of the 13 928 lines are characterized by at least one T-DNA and one Tos17 FST, respectively that OTL links to the rice genome browser OryGenesDB

At-74, a new enzyme involved in carbohydrate metabolism in Arabidopsis, confers glucose insensitivity upon overexpression

info:eu-repo/semantics/publishe

Identification of genes involved in Cd tolerance in Arabidopsis halleri

info:eu-repo/semantics/publishe

Comparative cDNA-AFLP analysis of roots from crosses between Arabidopsis halleri, a Zn, Cd hyperaccumulator and Arabidopsis petraea, a non-tolerant, non-accumulator relative

Abstract bookinfo:eu-repo/semantics/publishe

Identification of genes involved in Cd hypertolerance by using crosses between Arabidopsis halleri and Arabidopsis lyrata ssp. petraea

Book of abstractinfo:eu-repo/semantics/publishe

Identification of the Arabidopsis kangouroo mutant

Abstract S03-27info:eu-repo/semantics/publishe

Magnesium deficiency in sugar beets alters sugar partitioning and phloem loading in young mature leaves

SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Identification of genes involved in Cd hypertolerance by using crosses between A. halleri and A. lyrata ssp. petraea

info:eu-repo/semantics/publishe

Transcriptome analysis of roots from crosses between Arabidopsis halleri ,a Zn, Cd hyperaccumulator and Arabidopsis petraea, a non-tolerant, non-accumulator relative

Book of Abstractsinfo:eu-repo/semantics/publishe