Table II.
Functional distribution of the 141 gravity-regulated genes
| Functional Category | No. of Gravity-Regulated Genes | Percentage of Category |
|---|---|---|
| Oxidative stress/plant defense | 32 | 22.7 |
| Metabolism | 21 | 14.9 |
| Transcription | 12 | 8.5 |
| Cell wall/plasma membrane | 10 | 7.1 |
| Signal transduction | 9 | 6.4 |
| Heat shock proteins | 6 | 4.3 |
| Ethylene-responsive element binding factors | 6 | 4.3 |
| Calcium binding proteins | 3 | 2.1 |
| Energy | 2 | 1.4 |
| Cytoskeleton | 1 | 0.7 |
| Unknown/unclassified proteins | 39 | 27.7 |
The no. of gravity-regulated genes in each functional category is based on the no. of genes showing expression changes above the defined 2-fold change threshold in experiments displayed schematically in Fig. 1, B and C.