Table I.
Phenotypic comparisons among wild-type and HO mutants of Arabidopsisa
| Parameter | WS | ho2-1 | hy1-100 | Col-0 |
|---|---|---|---|---|
| Leaf number at bolting (short day)b | 35 ± 3 | 28 ± 2 | 25 ± 2 | 45 ± 5 |
| Leaf number at bolting (long day)cd | 6.9 ± 0.3 | 5.4 ± 0.3 | 4.4 ± 0.1 | 9.4 ± 1.1 |
| Leaf size (cm)e | 2.6 ± 0.3 | 1.6 ± 0.2 | 1.2 ± 0.4 | 2.9 ± 0.2 |
| Chlorophyll Af | 836 ± 27 | 751 ± 26 | 153 ± 5 | NDg |
| Chlorophyll B | 250 ± 7 | 240 ± 11 | 12 ± 1 | ND |
| Chlorophyll A+B | 1087 ± 33 | 990 ± 36 | 165 ± 5 | ND |
| Chlorophyll A/B | 3.3 ± 0.1 | 3.1 ± 1.0 | 13 ± 1 | ND |
| Chloroplasts per mesophyll cell | 82.6 ± 19.5 | 83.3 ± 19.6 | 46.4 ± 12.4 | 87.4 ± 18.1 |
a
Except for long-day flowering experiments, all data represents the mean of 12 plants (±sd).
b
Plants were grown under an 8-h-light/16-h-dark photoperiod.
c
Plants were grown under a 20-h-light/4-h-dark photoperiod.
d
Mean ± se of three independent experiments, each with 12 plants; individual experiments gave similar results.
e
Longest leaf measured on plants grown for 21 d under continuous white light.
f
Microgram chlorophyll per gram fresh wt tissue.
g
ND, Not determined.