中国水产科学2017，Vol.24Issue(5)：1065-1071,7.DOI:10.3724/SP.J.1118.2017.16285
光照强度和氮营养盐浓度对龙须菜生理代谢的影响
The effects of light intensity and nitrogen on the physiology of the red macroalgae Gracilaria lemaneiformis
摘要
Abstract
Gracilaria lemaneiformis,which has rich agar,comprises the third-largest seaweed cultivation industry group in China,after Laminaria and Laver.As light intensity gradually strengthens in summer,G.lemaneiformis in the surface layer of cultivation areas becomes green,or even white,yet the internal part remains dark red.G.lemaneiformis was cultured in artificial seawater with inorganic nitrogen (NO~:NH~--2:1).Three conditions:low light low nitrogen (L-N-),high light low nitrogen (L+N-) and high light high nitrogen (L+N+) were settled in this study.The impact of light intensity and nitrogen on physiology and metabolism of G.lemaneiformis was studied through measured matter accumulation,photosynthetic pigment,key enzyme during carbon and nitrogen metabolism under three conditions.The results showed that,compared with the L-N-group,the L+N-group showed decrease of soluble protein,water,phycoerythrin and chlorophyll-a,but the amount of soluble sugar increased 13.67％.Compared with the L+N-group,the L+N+ group showed the increase of soluble protein,water,phycoerythrin and chlorophyll-a,but the amount of soluble sugar decreased 16.3％.Compared with the L+N+ group,the L-N-group showed the increase of soluble protein,phycoerythrin,but there is no significant difference in its amount of water content,chlorophyll-a and soluble sugar.These results confirm that a sufficient amount of nitrogen can weaken the negative effects of high-intensity light on a red macroalgae.关键词
龙须菜/光照强度/氮源/生理指标Key words
Gracilaria lemaneiformis/light intensity/nitrogen supplementation/physiological index分类
农业科技引用本文复制引用
张清芳,冯颖琪,温金燕,钟名其,杜虹..光照强度和氮营养盐浓度对龙须菜生理代谢的影响[J].中国水产科学,2017,24(5):1065-1071,7.基金项目
广东省海洋与渔业局科技推广专项项目(A201405B06). （A201405B06）
