Table 3.
Genes encoding molecular chaperones are upregulated in germinating pollen and in tubes at basal temperature
| Genes upregulated in PT |
|||||
|---|---|---|---|---|---|
| Protein Class | Total | Wang | Wang | Qin | Qin |
| Genes No. | HP/MP | PT/MP | PT/dry | SIV/dry | |
|
| |||||
| Number of Genes Induced | |||||
| All Classes | 62 | 33 | 36 | 24 | 54 |
| HSP20 | 15 | 9 | 9 | 11 | 14 |
| HSP70, 90, and 100 | 20 | 12 | 14 | 8 | 20 |
| HSP40/DnaJ | 17 | 7 | 8 | 2 | 15 |
| Foldase | 5 | 3 | 3 | 3 | 4 |
| Other | 5 | 2 | 2 | 0 | 1 |
“Total genes” indicates the number of differentially expressed genes in each protein class from two studies. Number of genes induced refers to the members of each protein class that show a significant increase in FC (log2FC > 1) of RNA transcripts in response to pollen germination of tube growth. Wang et al. (2008) tested HP and PT grown in vitro for 4 h. Qin et al. (2009) tested PTs grown in vitro (PT) and SIV. Gene identification numbers and fold-change (log2FC) values are provided in Supplemental Table S3.