蓝藻异形胞。
Cyanobacterial heterocysts.
机构信息
Department of Biology, Texas A&M University, College Station, 77843, USA.
出版信息
Cold Spring Harb Perspect Biol. 2010 Apr;2(4):a000315. doi: 10.1101/cshperspect.a000315. Epub 2010 Feb 24.
Abstract
Many multicellular cyanobacteria produce specialized nitrogen-fixing heterocysts. During diazotrophic growth of the model organism Anabaena (Nostoc) sp. strain PCC 7120, a regulated developmental pattern of single heterocysts separated by about 10 to 20 photosynthetic vegetative cells is maintained along filaments. Heterocyst structure and metabolic activity function together to accommodate the oxygen-sensitive process of nitrogen fixation. This article focuses on recent research on heterocyst development, including morphogenesis, transport of molecules between cells in a filament, differential gene expression, and pattern formation.
摘要
许多多细胞蓝细菌产生专门的固氮异形胞。在模式生物鱼腥藻（念珠藻）株 PCC 7120 的固氮生长过程中，沿着丝状体维持着约 10 到 20 个光合营养细胞分隔的单个异形胞的有调节的发育模式。异形胞的结构和代谢活性共同作用，以适应对氧敏感的固氮过程。本文重点介绍异形胞发育的最新研究进展，包括形态发生、丝状体中细胞之间的分子运输、差异基因表达和模式形成。
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