An experiment was conducted to study the shade-tolerance of 10 species of garden plants aiming to provide some experimental basis for the selection and collocation of garden plants. Photosynthesis curve and photosynthetic light-response curve of all the selected plants were determined with the aid of LI-6400 portable photosynthesis system, including chlorophyll content, chlorophyll a/b ratio, net photosynthetic rate, light compensation point, light saturation point, and apparent quantum yield. The measured data were analysed by means of cluster analysis. Results show that the shade-tolerance of the plants is related to many physiological factors, such as light compensation point, apparent quantum efficiency, net photosynthetic rate, contents of chlorophyll-a and chlorophyll-b, and chlorophyll a/b. Light compensation point is the most important factor. According to their shade-tolerances, the 10 species of garden plants are sorted into four groups: high shade-tolerant species (Michelia figo (Lour. ) Spreng, Camellia sasanqua Thunb. , Chaenomeles speciosa) , shade-tolerant species (Jasminum mesnyi Hance, Chimonanthus praecox (L. ) Link) , medium shade-tolerant species (Hibiscus mutabilis Linn. , Euonymus japonicus var. aureo-marginatus Reg. , Loropetalum chinense (R. Br) Oliv var. rubrum Yieh) , and shade-sensitive species (Forsythia viridissima Lindl and Lagerstroemia indica).
NETL
NSTL
万方数据
维普
