| Range |
0.88-1.54 unitless
|
| Organism |
Plants |
| Reference |
Lopes DB, Berger RD. The effects of rust and anthracnose on the photosynthetic competence of diseased bean leaves. Phytopathology. 2001 Feb91(2):pp. 214 fig. 2PubMed ID18944396
|
| Method |
The value is beta. The equation P(x)/P(0) = (1 - x)^(beta) was used to relate relative photosynthetic rate (P(x)/P(0)) to proportional disease severity (x), where beta represents the ratio between virtual and visual lesion. |
| Comments |
Rust caused by Uromyces appendiculatus. The beta values obtained for rust were near one, indicating that the effect of the pathogen on the remaining green leaf area was minimal. Relative photosynthetic rate is the ratio of the photosynthetic rate of a diseased leaf to the average photosynthetic rate of the healthy control leaves. The virtual lesion is the proportion of leaf tissue equal to or larger than the visual lesion (proportion of leaf tissue with visible symptoms), in which photosynthesis is impaired and assumed to be zero. |
| Entered by |
Uri M |
| ID |
102590 |