Optimization of conditions for tetraspore release and assessment of photosynthetic activities for different generation branches of Gracilaria lemaneiformis Bory

IOCAS-IR

	Optimization of conditions for tetraspore release and assessment of photosynthetic activities for different generation branches of Gracilaria lemaneiformis Bory
	Wang ZY(王志远); Wang GC(王广策); Niu JF(牛建峰); Wang WJ(汪文俊); Peng G(彭光)
发表期刊	Chinese Journal of Oceanology and Limnology
ISSN	0254-4059
	2010-08-15
出版年	2010
卷号	v.28 期号:04 页码:28-38
文献类型	CNKI期刊论文
摘要	Gracilaria lemaneiformis Bory is an economically important alga that is primarily used for agar production.Although tetraspores are ideal seeds for the cultivation of G.lemaneiformis,the most popular culture method is currently based on vegetative fragments,which is labor-intensive and time-consuming.In this study,we optimized the conditions for tetraspore release and evaluated the photosynthetic activities of different colonies formed from the branches of G.lemaneiformis using a PAM(pulse-amplitude-modulated) measuring system.The results showed that variations in temperature and salinityhad significant effects on tetraspore yield.However,variations in the photon flux density(from 15 μmol m-2 s-1 to 480 μmol m-2 s-1) had no apparent effect on tetraspore yield.Moreover,the PAM-parameters Y(I),Y(Ⅱ),ETR(I),ETR(Ⅱ) and Fv/Fm of colonies formed from different branches showed the same trend:parameter values of first generation branches>second generation branches>third generation branches.These results suggest that the photosynthetic activities of different colonies of branches changed with the same trend.Furthermore,photosynthesis in G.lemaneiformis was found to be involved in vegetative reproduction and tetraspore formation.Finally,the first generation branches grew slowly,but accumulated organic compounds to form large numbers of tetraspores.Taken together,these results showed that the first generation branches are ideal materials for the release of tetraspores.
关键词	Gracilaria lemaneiformis Bory tetraspore pulse-amplitude-modulated photosynthesis
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A006
CNKI专题名称	生物学;
分类号	Q948.8
收录类别	中科院核心
语种	英文;
资助项目(基金）	Supported by the National Natural Science Foundation of China(No.30830015) ; the National Key Technology Research and Development Program of the 11th Five-Year Plan(No.2006BAD09A04) ; the National High Technology Research and Development Program of China(863Program,Nos.2006AA10A402,2007AA09Z406,2006AA05Z112,2006AA10A413)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/191996
专题	中国科学院海洋研究所
作者单位	1.CollegeofMarineScienceandEngineering,TianjinUniversityofScienceandTechnology 2.KeyLaboratoryofExperimentalMarineBiology,InstituteofOceanology,ChineseAcademyofSciences
推荐引用方式 GB/T 7714	Wang ZY,Wang GC,Niu JF,et al. Optimization of conditions for tetraspore release and assessment of photosynthetic activities for different generation branches of Gracilaria lemaneiformis Bory. 2010.