Grateloupia turuturu is a commercial red alga with potential value in nutraceuticals and pharmaceuticals. To supplement information on its life history and verify whether carpospores can be used for seedling culture, ...Grateloupia turuturu is a commercial red alga with potential value in nutraceuticals and pharmaceuticals. To supplement information on its life history and verify whether carpospores can be used for seedling culture, early development of G. turuturu was investigated under culture conditions （27~C, 10-13 ~mol/（mZ.s） in irradiance, photoperiod 10：14 h L：D）. Three physiological stages were recognized by continuous microscopic observation： division stage, discoid crust stage, and juvenile seedling stage. At the beginning of the division stage, the carpospores developed germ tubes into which the carpospore protoplasm was evacuated, and then the carpospore protoplasm in the germ tubes began to divide continuously until discoid crusts formed. Finally, upright thalli appeared on the discoid crusts and developed into juvenile seedlings. It took about 60 days for carpospores to develop into juvenile seedlings. The growth parameters, including germination rate for carpospores and discoid crust diameter, were recorded. These results contribute more information on the life cycle, and at the same time are of great significance in the scaling-up of artificial seedling cultures of G. turuturu.展开更多
Through the method of questionnaire survey, this paper investigate the current status of life views from some college students in Guangdong Province, to get more acquainted with the problems existing in college studen...Through the method of questionnaire survey, this paper investigate the current status of life views from some college students in Guangdong Province, to get more acquainted with the problems existing in college students of life views, and analyze the reasons, in order to put forward specific, feasible and effective suggestions aimed at the current status of college students at school, and provide strategic thinking for the implementation of life education for college students. Through the implementation of life education strategy, cultivate college students to aware of understanding life, cherish life and love life, and then learn to respect life, care for life, accept life and other people.展开更多
基金Supported by the Natural Science Foundation of Shandong Province,China(No.Y2007D42)
文摘Grateloupia turuturu is a commercial red alga with potential value in nutraceuticals and pharmaceuticals. To supplement information on its life history and verify whether carpospores can be used for seedling culture, early development of G. turuturu was investigated under culture conditions （27~C, 10-13 ~mol/（mZ.s） in irradiance, photoperiod 10：14 h L：D）. Three physiological stages were recognized by continuous microscopic observation： division stage, discoid crust stage, and juvenile seedling stage. At the beginning of the division stage, the carpospores developed germ tubes into which the carpospore protoplasm was evacuated, and then the carpospore protoplasm in the germ tubes began to divide continuously until discoid crusts formed. Finally, upright thalli appeared on the discoid crusts and developed into juvenile seedlings. It took about 60 days for carpospores to develop into juvenile seedlings. The growth parameters, including germination rate for carpospores and discoid crust diameter, were recorded. These results contribute more information on the life cycle, and at the same time are of great significance in the scaling-up of artificial seedling cultures of G. turuturu.
文摘Through the method of questionnaire survey, this paper investigate the current status of life views from some college students in Guangdong Province, to get more acquainted with the problems existing in college students of life views, and analyze the reasons, in order to put forward specific, feasible and effective suggestions aimed at the current status of college students at school, and provide strategic thinking for the implementation of life education for college students. Through the implementation of life education strategy, cultivate college students to aware of understanding life, cherish life and love life, and then learn to respect life, care for life, accept life and other people.
