Identification of novel Arabidopsis thaliana genes which are induced by high levels of boron
Boron (B) is an essential nutrient for plants but is toxic at high levels. We performed transcriptome analysis under conditions of both low and high B in <i>Arabidopsis thaliana</i>. There is a positive correlation between the levels of gene induction by low and high B, suggesting that common pathways operate during these responses. Induction by high B was also confirmed for nine genes in an independent experiment. Transcripts of <i>At1g03770</i> (transcription factor) and <i>At5g57340</i> were found to be elevated in roots, whereas <i>At2g04040</i>, <i>At2g04050</i>, <i>At2g04070</i> (all encoding multidrug and toxic compound extrusion transporters), <i>At1g32870</i> (transcription factor), <i>At5g51440</i> (heat shock protein-like), <i>At2g41730</i> and <i>At2g21640</i> are induced in the shoots. The accumulation of both <i>At2g04050</i> and <i>At5g51440</i> transcripts was further found to be elevated by more than 100-fold after two days of high B treatment. Our findings thus represent the first identification of high B-induced genes.
- Plant biotechnology
Plant biotechnology 24(3), 355-360, 2007-06-01
Japanese Society for Plant Cell and Molecular Biology