From:Validating internal controls for quantitative plant gene expression studies
| Sample name | Collection date (2001) | Tissue description |
|---|---|---|
| VB1 | March 20 | Overwintered terminal vegetative buds |
| VB2 | April 3 | Overwintered terminal vegetative buds approximately 1 week prior to bud flush |
| S | April 18 | Newly expanding shoots (average shoot elongation = 38 mm) |
| ST1 | May 3 | Shoot tips, including unexpanded leaves |
| ST2 | June 19 | Shoot tips, including unexpanded leaves |
| VB3 | August 7 | Terminal vegetative buds |
| VB4 | October 15 | Terminal vegetative buds |
| FB | October 15 | Inflorescence buds |