Table II.
A comparison of the effects of dark chilling on the average area (μm2) of individual intercellular spaces (n = 50) in the middle cortex, inner cortex, and infected zone regions of nodules collected from PAN and HT plants that had been either maintained at optimal night temperatures or subjected to three nights of dark chilling
Values in parentheses give percentage decreases in the area of intercellular spaces in chilled HT plants compared with those maintained at optimal night temperatures. All values are means ± se of data from nodules of three to five plants per treatment.
| Region | PAN
|
HT
|
||
|---|---|---|---|---|
| Control | Chilled | Control | Chilled | |
| Middle cortex | 14.0 ± 2.1 | 15.5 ± 1.8 | 14.7 ± 3.1 | 9.4 ± 0.5 (−36%) |
| Inner cortex | 7.0 ± 1.3 | 9.1 ± 2.6 | 8.1 ± 1.1 | 5.0 ± 0.2 (−38%) |
| Infected zone | 25.4 ± 1.1 | 22.4 ± 5.9 | 24.4 ± 1.6 | 14.1 ± 3.7 (−42%) |