Effects Of Light And Nutrient On Growth And Photosynthetic Pigment Of Gloiopeltis Furcata

Gloiopeltis furcata is an important red algae for its high nutritional and medicinal value, its market price of up to 2000 yuan/kg. However, over-exploitation has caused the scarcity of Gloiopeltis resources. It needs to improve breeding technology and farming techniques to meet market demand. Now the nutritional, medicinal and ecological aspects are have reported, but its breeding have not scale, it needs to be further developed. The studies of taxonomic, distribution, nutrition, breeding were summarized in the article. The effects of nutrient on growth, sprouting and survival of Gloiopeltis furcata discs were studied. The effects of photoperiod and light quality on growth, sprouting and survival of Gloiopeltis furcata discs were studied and the effect of photoperiod and light quality on growth and photosynthetic pigment of Gloiopeltis furcata thalli were also studied. Results presented in this study are expected to assist the progress of physiology, ecology, artificial seeding and industrial culture of Gloiopeltis furcata.1. Effects of nutrient on growth and photosynthetic pigment of Gloiopeltis furcateDiscs and thalli of Gloiopeltis furcata were separately incubated in different nutrient.The result showed that whichever group added nutritional salt had not significant higher percent of sprouting and survival rate of discs than the control one. The weight of thalli was no significant differences between the groups added nutritional salt and the control one, but the content of chlorophyll a and phycobiliprotein of the thalli of the groups which added Na NO₃ of 40⁸0 mg·L^-1 were significant higher than the control one. Experimental results showed that it need not to add nutritional salt for incubation Gloiopeltis furcata discs while it need to add Na NO₃ 10⁴0 mg·L^-1and K₂HPO₄ 4 mg·L^-1for incubation Gloiopeltis furcata thalli.2. Effects of photoperiod on growth and photosynthetic pigment of Gloiopeltis furcataThe effects of photoperiod on growth, sprouting and survival of Gloiopeltis furcata discs were studied and the effect of photoperiod on growth and photosynthetic pigment of Gloiopeltis furcata thalli were also studied. Results presented in this study are expected to assist the progress of physiology, ecology, artificial seeding and industrial culture of Gloiopeltis furcata. Gloiopeltis furcata spore which attached for one day and Gloiopeltis furcata thalli were respectively treated with six photoperiod in three light intensity. The result showed that there was interaction influence of photoperiod and light intensity. Gloiopeltis furcata spore incubated at 8500¹4500 lx with 16 L:8 D had significantly fastest growth, and the groups which were incubated at 8500¹4500 lx with 8 L:16 D had highest percent of sprouting rate of discs. Photoperiod had no significant effect on the survival rate of discs, while the groups incubated at 2500 lx had significant lower survival rate of discs than the groups incubated at 8500¹4500 lx. The thalli incubated at 8500¹4500 lx with14 L:10 D and16 L:8 D had significant faster growth and lower content of chlorophyll-a and phycobiliprotein than the other groups. For improving sprouting rate of disc, optimum photoperiod and light intensity range for Gloiopeltis furcata discs were 8 L:16 D and 8500¹4500 lx. In order to improve growth of thalli, optimum photoperiod and light intensity range for Gloiopeltis furcata thalli were 14 L:10 D and 8500¹4500 lx.3. Effects of light quality on growth and photosynthetic pigment of Gloiopeltis furcataGloiopeltis furcata spore which attached for one day were respectively treated with eight light quality in three light intensity. Gloiopeltis furcata thalli were respectively treated with five light quality in two light intensity. The result showed that there was interaction influence of light quality and light intensity. Gloiopeltis furcata spore incubated at yellow membrane had highest percent of sprouting rate of spore, the groups incubated at yellow light had significantly fastest growth, The percent of sprouting rate of discs incubated at green membrane, yellow light, white light and blue membrane were significantly faster than the other treatments, optimum light quality and light intensity range for sporeling were red light and, the groups incubated at blue light had significant lower growth and sprouting rate of discs than the other groups. The thalli incubated at red light had significant faster growth than the other groups, Gloiopeltis furcata thalli incubated at blue light and blue membrane had highest content of phycobiliprotein and chlorophyll-a. For improving sprouting rate of disc, optimum photoperiod and light intensity range for Gloiopeltis furcata discs were yellow membrane and 8000 lx. In order to improve growth of thalli, optimum photoperiod and light intensity range for Gloiopeltis furcata thalli were red light and 5000 lx.