| Using invasive alien plant Oenothera rosea seedlings as materials, effects of different transmittance of 20%、40%、60%、80%、100% on growth and development, leaf morphology and physiological indicators were studied. The results showed that plant height, number of upper branches, content of leaves, individual leaf area, total leaf area, crown area, leaf area index increased when the light intensity decreased, in order to improve the utilization of solar energy. Low branches individual leaf mass area ration, and root biomass increased when the lighting enhanced, in order to ease the photoinhibition and maintain the water balance. Concentrated light enhanced flowering,increased flower number, pollen viability, seed set rate and the root activity.The content of photosynthetic pigments increased when the light intensity decreased. Low light leaded to the enhancement of electrolyte leakage rate, content of malonldehyde, content of protein and free proline. The content of soluble sugar decreased increased in low light situations. These consistency strategies reacted different light resource utilization competition. So plants with higher plasticity and moderate shade-tolerant property are most likely to become invasive species. |
