关键词: 烟草野火病菌, 光系统Ⅱ, 放氧复合体, D1蛋白, 活性氧

Abstract: Pothole is a product of the interaction between river flow and riverbed. It is a component of microtopography of riverbed and also is a special habitat in the river ecosystem. In this study, the shape characteristics of potholes and the benthic invertebrates in the potholes were investigated in Wubu River, Chongqing. The standard statistical methodologies were used to quantitatively describe the features of the pothole shape, the community structure of benthic invertebrates and the relationship between pothole area and the species richness of benthic invertebrate community in the potholes of mountain rivers. The results indicated that the proportion of the potholes with 1.0-1.2 longtoshort axis ratio was the highest, and the potholes’ diameters were mostly distributed within 10-20 cm. The long axis and short axis, diameter and depth of the potholes were strongly (log) positively correlated. A total of 34 species of benthic invertebrates were collected from the potholes, and the dominant species belonged to Baetidae, Corixidae, and Caenidae. There were significant differences in functional feeding groups. The collectorgatherers and the shredders were most and least abundant functional feeding groups, respectively. In addition, there was a significant positive relationship between pothole area and species richness of benthic invertebrate community in the potholes.

Key words: D1 protein., reactive oxygen species, Pseudomonas syringae pv. tabaci, photosystem Ⅱ, oxygen evolving complex