Centis-Aubay S, Gasset G, Mazars C, Ranjeva R, Graziana A
Signaux et Messages Cellulaires chez les Végétaux, Centre National de la Recherche Scientifique, Université Paul Sabatier, 24 chemin de Borde Rouge, Auzeville, 31326 Castanet-Tolosan, France.
Planta. 2003 Dec;218(2):179-85. doi: 10.1007/s00425-003-1103-7. Epub 2003 Sep 12.
By comparing the expression patterns of selected genes from Arabidopsis thaliana (L.) Heynh. grown either at 1 g or on a clinostat (horizontally or vertically inverted, 1 rpm), and either used directly or after hypergravity stimulation, we have shown that the pattern of expression did not proceed in a stereotypical manner. Rather, the selected genes fell into different classes. These classes include (i) those insensitive to the gravitational conditions, (ii) those that are regulated in an opposite manner by hypergravity and clinostat conditions, (iii) those that are desensitised to hypergravity by long-term culture on a clinostat, and (iv) those enhanced by such a treatment. Our data suggest that rapid reorientation of gene expression is likely to occur in response to changes in the gravitational conditions.
通过比较拟南芥（Arabidopsis thaliana (L.) Heynh.）在1g条件下生长、在回转器上（水平或垂直倒置，1转/分钟）生长，以及直接使用或在超重力刺激后使用时所选基因的表达模式，我们发现基因表达模式并非以固定模式进行。相反，所选基因可分为不同类别。这些类别包括：（i）对重力条件不敏感的基因；（ii）在超重力和回转器条件下以相反方式调控的基因；（iii）通过在回转器上长期培养而对超重力脱敏的基因；以及（iv）经此类处理后表达增强的基因。我们的数据表明，基因表达可能会因重力条件的变化而迅速重新定向。
