Photosynthetic Characteristics of Four Calanthe Species

doi:10.11924/j.issn.1000-6850.casb18080118

Abstract

Abstract: This study aims to understand the difference of assimilation ability of four different kind of Calanthe species, and to compare the ability of different species to adapt to sunlight under greenhouse cultivation, thus to provide a theoretical basis for production management in facility cultivation.Taking Calanthe argenteo-striata, C. labrosa, C. sylvatica, and C. triplicata as materials, response characteristic curve of photosynthesis to the light and CO2 responses, chlorophyll fluorescence data, and relative chlorophyll contents of these four species were studied. The results showed that, according to parameters of the established response characteristic curve of photosynthesis to the light, the photosynthesis capability of four plants was C. labrosa (2.04) > C. argenteo-striata (1.75) > C. sylvatica (1.65) > C. triplicata (0.8). The rapid light curves showed that the net photosynthetic rate increased as the photosynthetic active radiation and intercellular CO2 mole fraction increased, and the rank of maximal photochemical efficiency was C. argenteo-striata (0.625) > C. sylvatica (0.583) > C. labrosa (0.561) > C. triplicata (0.544), the rank of relative chlorophyll content of the plants in the study was C. triplicata (39.90) > C. argenteo-striata (31.29) > C. labrosa (27.75) > C. Sylvatica (27.25). The comparison of the photosynthetic response parameters showed that C. argenteo-striata and C. labrosa have higher photosynthetic rate Light use range, adaptability to light energy.

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