Colony development and physiological characterization of the edible blue-green alga, Nostoc sphaeroides (Nostocaceae, Cyanophyta)
Colony development and physiological characterization of the edible blue-green alga, Nostoc sphaeroides (Nostocaceae, Cyanophyta)
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食用蓝绿藻，发菜（发菜科，蓝藻门）的菌落发育和生理特征
DOI：
10.1016/j.pnsc.2008.03.031
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发表时间：
2008-12-10
影响因子：
4.7
通讯作者：
Hu, Zhengyu
中科院分区：
文献类型：
--
作者：
Deng, Zhongyang;Hu, Qiang;Hu, Zhengyu
可食用的蓝绿藻（Nostoc sphaeroides Kutzing）能够形成微菌落和球形大菌落。几个世纪以来，它一直被用作一种有效的草药和膳食补充剂，因为它的营养和药理效益。然而，关于球形大菌落的发展和影响其结构的环境因素的资料有限。本文描述了球孢N. sphaeroides从单毛体到大菌落的形态发生过程。在此过程中，不同大小的大菌落的结构特征主要为密集的斑、环、致密的核和液态核的形成；和。根据大菌落的大小，大菌落内的哀叹体呈现出不同的长度和排列。同时，温度和光强对大菌落的内部结构也有较大的影响。随着小菌落尺寸进一步增大，形成30 mm的大菌落，菌落分化为明显的外层、中层和内层。的。与内层植物相比，外层植物的最大光合速率、光饱和点和光合效率更高；而。内层叶片叶绿素a和藻胆蛋白含量高于外层叶片。本研究结果对作为营养保健品的球藻的大规模栽培具有重要意义。(c) 2008年中国科学院国家自然科学基金项目；爱思唯尔有限公司、中国科学出版社出版。版权所有。
The edible blue-green alga, Nostoc sphaeroides Kutzing, is able to form microcolonies and spherical macrocolonies. It has been used as a potent herbal medicine and dietary supplement for centuries because of its nutraceutical and pharmacological benefits. However, limited information is available on the development of the spherical macrocolonies and the environmental factors that affect their structure. This report described the morphogenesis of N. sphaeroides from single trichomes to macrocolonies. During the process, most structural features of macrocolonies of various sizes were dense maculas, rings, the compact core and the formation of liquid core; and the. laments within the macrocolonies showed different lengths and arrays depending on the sizes of macrocolonies. Meanwhile temperature and light intensity also strongly affected the internal structure of macrocolonies. As microcolonies further increased in size to form 30 mm macrocolonies, the colonies differentiated into distinct outer, middle and inner layers. The. laments of the outer layer showed higher maximum photosynthetic rates, higher light saturation point, and higher photosynthetic effciency than those of the inner layer; whereas the. laments of the inner layer had a higher content of chlorophyll a and phycobiliproteins than those of the outer layer. The results obtained in this study were important for the mass cultivation of N. sphaeroides as a nutraceutical product. (c) 2008 National Natural Science Foundation of China and Chinese Academy of Sciences. Published by Elsevier Limited and Science in China Press. All rights reserved.