Effects of Different Light Intensity on Photosynthetic Pigment and Chlorophyll Fluorescence Parameters of Neoporphyra sp.Sporo-phyte
The sporophytes of Neoporphyra sp.were placed in 5 different light intensities,respectively 10,20,40,80 and 160 μmol/(m2·s),respectively.Chlorophyll a(Chl a),carotenoids(Car),phycoerythrin(PE),maximum photosynthetic efficiency(Fv/Fm)and maximum rela-tive electron transfer rate(rETRmax)were measured,the effects of light intensity on photosynthetic pigment content and chlorophyll fluores-cence parameters of Neoporphyra sp.sporophyte were explored.The result showed that the photosynthetic pigment contents(Chl a,Car,and PE)of N.sp.sporophyte by 20 μmol/(m2·s)were relatively high during the cultivation period,and the Fv/Fm of Neoporphyra sp.sporophyte after 30 days of cultivation showed a high value.The chlorophyll fluorescence parameters(Fv/Fm and rETRmax)showed high values after cul-tured at 80 and 160 μmol/(m2·s)for 15 days,while the photosynthetic pigment content and chlorophyll fluorescence parameters showed low values after 30 days of culture.The sporophytes of Neoporphyra sp.were healthy purplish red in 20 μmol/(m2·s)cultures,while the sporo-phytes of Neoporphyra sp.were light and yellow in high light cultures[80 and 160 μmol/(m2·s)].According to the photosynthetic pigment content and chlorophyll fluorescence parameters,the optimal light intensity of Neoporphyra sp.spores was 20 μmol/(m2·s).
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