Table VI.
Disease severity in ethylene-insensitive mutants in response to R. solani
| Soybean Line | Root/Hypocotyl
|
Shoot
|
|||||
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 2 | 3 | 4 | |
| Hobbit 87 | 1.5 | – | 4.5 | 4.7 | – | 3.5 | 3.6 |
| etr1-1 | 1.8 | – | 4.8 | 3.9a,b | – | 4.1 | 2.2c,b |
| T123N37 | – | – | – | 4.9 | – | – | 3.7 |
| T124N38 | – | – | – | 5.2 | – | – | 4.1 |
| A90-312022 | 0.8 | 3.6 | 4.1 | 4.9 | 0.0 | 2.0 | 4.0 |
| etr2-1 | 1.6a,d | 3.2 | 4.8 | 5.0 | 0.7 | 4.2c,d | 4.1 |
| T58N5 | 2.5c,d | 3.5 | 4.5 | 4.5 | 0.1 | 3.8a,d | 3.5 |
Disease symptom ratings for aboveground tissues or for root and hypocotyl tissues, presented as mean disease severity on a scale ranging from 0 (very healthy) to 6 (seedling completely rotted); –, not tested. Data are presented from four separate tests; test number is indicated at the top of the column. Statistical comparisons are between the mutant and its respective parent, Hobbit 87 or A90-312022.
a
Significant at P < 0.05.
b
Disease symptoms are less severe than parent.
c
Significant at P < 0.01.
d
Disease symptoms are more severe than parent.