Table 5. Average activities of sucrose phosphate synthase (SPS), sucrose synthase (SuSy), acidic invertase (Acidic INV) and alkaline invertase (Alkaline INV) in cotton fiber during fiber secondary wall rapid-thickening (FSWR) and their analysis of variance under the coupling of planting date and shading in 2010 and 2011.
| Planting dates | CRLR | SPS | SuSy | Acidic INV | Alkaline INV | ||||
| (dd-mm) | (%) | (mg sucrose g−1FW h−1) | (mg fructose g−1FW h−1) | (mg glucose g−1FW h−1) | (mg glucose g−1FW h−1) | ||||
| 2010 | 2011 | 2010 | 2011 | 2010 | 2011 | 2010 | 2011 | ||
| Kemian 1 | |||||||||
| 25-Apr | 100 | 13.9 a | 10.0 a | 71.2 a | 72.8 a | 63.7a | 78.1 a | 54.8 a | 70.8 a |
| 80 | 14.2 a | 8.6 b | 68.4 b | 63.8 b | 62.2 b | 74.9 b | 52.6 ab | 65.1 b | |
| 60 | 12.7 b | 7.8 c | 64.3 c | 63.1 b | 57.8 c | 71.2 c | 50.8 b | 64.8 b | |
| 25-May | 100 | 13.7 a | 9.8 a | 51.7 a | 50.4 a | 70.9 a | 73.7 a | 55.9 a | 69.5 a |
| 80 | 13.6 a | 9.2 b | 51.8 a | 45.1 b | 66.1 b | 68.4 b | 52.7 b | 66.2 b | |
| 60 | 12.9 b | 8.4 c | 48.0 b | 43.6 c | 61.6 c | 64.1 c | 52.0 c | 63.3 c | |
| 10-Jun | 100 | 11.2 a | 7.8 a | 94.6 a | 66.7 a | 118.3 a | 104.4 a | 73.8 a | 88.6 a |
| 80 | 10.5 a | 6.8 b | 88.7 b | 59.8 b | 110.0 b | 101.3 b | 69.7 b | 85.5 b | |
| 60 | 9.8 b | 6.3 c | 88.8 b | 59.7 b | 103.2 c | 95.6 c | 68.7 b | 85.6 b | |
| CVP(%) | 11.68 | 13.30 | 29.61 | 18.35 | 35.20 | 19.46 | 17.37 | 14.02 | |
| CVS(%) | 6.04 | 12.50 | 5.11 | 8.14 | 4.95 | 4.65 | 3.77 | 5.06 | |
| CVP×S(%) | 12.86 | 15.38 | 25.33 | 17.06 | 30.21 | 18.51 | 15.30 | 14.04 | |
| Sumian 15 | |||||||||
| 25-Apr | 100 | 14.4 a | 9.6 a | 66.3 a | 73.1 a | 73.2 a | 77.0 a | 50.3 a | 70.7 a |
| 80 | 12.7 b | 9.3 a | 62.6 b | 69.5 b | 71.0 b | 71.3 b | 48.4 b | 68.3 b | |
| 60 | 11.0 c | 8.3 b | 59.5 c | 66.0 c | 67.6 c | 66.7 c | 47.3 b | 68.1 b | |
| 25-May | 100 | 12.8 a | 9.6 a | 50.1 a | 49.6 a | 73.4 a | 81.4 a | 61.5 a | 65.3 a |
| 80 | 12.5 ab | 9.1 b | 47.2 b | 47.9 b | 73.9 a | 77.0 b | 59.8 b | 62.4 b | |
| 60 | 11.9 b | 9.1 b | 47.0 b | 43.9 c | 67.6 b | 70.4 c | 57.0 c | 62.4 b | |
| 10-Jun | 100 | 9.0 a | 6.6 a | 88.0 a | 68.6 a | 105.6 c | 130.2 a | 71.0 c | 77.5 c |
| 80 | 8.8 ab | 5.9 b | 84.7 a | 63.8 b | 107.3 b | 124.2 b | 72.8 b | 79.8 b | |
| 60 | 8.2 b | 5.8 b | 74.8 b | 59.4 c | 108.5 a | 123.9 b | 75.3 a | 84.4 a | |
| CVP(%) | 23.24 | 19.66 | 27.95 | 19.54 | 22.16 | 30.68 | 17.01 | 8.59 | |
| CVS(%) | 13.53 | 7.15 | 5.38 | 5.08 | 4.00 | 7.23 | 3.12 | 2.09 | |
| CVP×S(%) | 19.12 | 19.36 | 23.98 | 17.61 | 21.85 | 28.98 | 17.76 | 11.08 | |
FW, fresh weight; Values in the same planting date followed by the different letters within a column are significantly different at 0.05 probability level; CVS was calculated from the data of three shading treatments in normal planting date of 25 April, CVP was calculated from the data of three planting dates and CVP×S was calculated from the data of all treatments; * and ** mean significant difference at 0.05 and 0.01 probability levels, respectively; NS means non-significant differences.