Table 1. Relative germination rates of the Pks1 mutants of seven Metarhizium species, and their respective wild-type strains (WT), under three abiotic stresses.
UV radiation | Heat stress | Cold stress | ||||
---|---|---|---|---|---|---|
WT | ΔPks1-#1 | WT | ΔPks1-#1 | WT | ΔPks1-#1 | |
M. robertsii | Ref 171 | Ref 171 | 0.47±0.03a | 0.71±0.13b | 2.16±0.15a | 2.42±0.33a |
M. anisopliae | 0.21±0.04a | 0.47±0.01b | 0.40±0.07a | 0.49±0.11a | 2.92±0.17a | 2.96±0.21a |
M. brunneum | 0.27±0.03a | 0.38±0.02b | 1.16±0.14a | 1.35±0.21a | 2.17±0.12a | 2.09±0.09a |
M. guizhouense | 0.33±0.03a | 0.33±0.01a | 0.69±0.04a | 1.46±0.23b | 3.02±0.11a | 2.64±0.34a |
M. majus | 0.27±0.03a | 0.16±0.03b | 2.23±0.41a | 2.44±0.58a | 2.59±0.11a | 1.44±0.1b |
M. acridum | 0.47±0.02a | 0.52±0.1a | 0.16±0.02a | 0.09±0.01a | 2.47±0.04a | 2.42±0.24a |
M. album | 0.38±0.04a | 0.36±0.09a | 1.86±0.04a | 5.10±0.49b | 1.61±0.03a | 3.30±0.20b |
Note:
1: Data published in reference 17; deletion of the Pks1 gene significantly reduced the tolerance of M. robertsii to UV radiation.
The numerical values in the table: the relative germination inhibition of a given stressor on each strain was calculated as (Gc-Gt)/ Gc, where Gc and Gt denote the GT50 (Time taken for 50% of conidia to germinate) of the stressed and unstressed conidia, respectively.