Swingley Wesley D, Hohmann-Marriott Martin F, Le Olson Tien, Blankenship Robert E
Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287-1604, USA.
Appl Environ Microbiol. 2005 Dec;71(12):8606-10. doi: 10.1128/AEM.71.12.8606-8610.2005.
The cyanobacterial genus Acaryochloris is the only known group of oxygenic phototrophs that contain chlorophyll d rather than chlorophyll a as the major photosynthetic pigment. Studies on this organism are still in their earliest stages, and biochemical analysis has rapidly outpaced growth optimization. We have investigated culture growth of the major strains of Acaryochloris marina (MBIC11017 and MBIC10697) by using several published and some newly developed growth media. It was determined that heavy addition of iron significantly enhanced culture longevity. These high-iron cultures showed an ultrastructure with thylakoid stacks that resemble traditional cyanobacteria (unlike previous studies). These cultures also show a novel reversal in the pigment ratios of the photosystem II signature components chlorophyll a and pheophytin a, as opposed to those in previous studies.
蓝藻纲的蓝绿藻属是唯一已知的以叶绿素d而非叶绿素a作为主要光合色素的产氧光合生物群体。对这种生物的研究仍处于早期阶段，生化分析的发展速度已远超生长优化研究。我们使用了几种已发表的以及一些新开发的生长培养基，对海生蓝绿藻的主要菌株（MBIC11017和MBIC10697）的培养生长进行了研究。结果确定，大量添加铁显著延长了培养物的存活时间。这些高铁培养物呈现出具有类囊体堆叠的超微结构，类似于传统蓝藻（与之前的研究不同）。与之前的研究相比，这些培养物在光系统II标志性成分叶绿素a和脱镁叶绿素a的色素比例上也出现了新的反转。
