适应与塑料对温度,光线和酸盐可用性的反应在培养的雪藻菌株中
Emily L M Broadwell1, Rachel E Pickford1, Rupert G Perkins2
1School of Geographical Sciences, University of Bristol, University Road, Bristol, BS8 1SS, United Kingdom.
FEMS microbiology ecology
|August 8, 2023
概括
雪藻,如Chloromonas spp.,在寒冷的环境中壮成长,对温度和光线有独特的生理反应. 这些生物可以调整它们的光化学和营养平衡,以在充满挑战的北极和南极条件下生存.
科学领域:
- * 微生物学 微生物学
- * 临界技术 * 临界技术
- * 光生理学 光生理学
背景情况:
- * 雪藻开花在寒冷,低营养和高光环境中很常见.
- * 了解雪藻反应对于极地生态系统研究至关重要.
研究的目的:
- * 为了研究雪藻 (Chloromonas spp. 雪藻) 的光生理学和细胞固体测量反应. ) 和Microglena spp.) 的不同种类. 对于不同的温度,酸盐的可用性和光强度.
- * 确定这些藻类的最佳温度和适应策略.
主要方法:
- * 在受控的温度梯度 (515°C),酸盐 (110μmol L-1),光 (50和500μmol光子m-2s-1) 下培养北极和南极雪藻菌株.
- *测量光生理学参数 (例如,Fv/Fm,电子传输速率) 和细胞固体测量 (C:N比率).
主要成果:
- *低温 (5°C) 显著影响光生理学,模仿高光应激,并表明具有更高承载能力的心理友好 (喜欢寒冷) 特性.
- * 在营养补充条件下,藻类接近Redfield C:N固态度,但在低酸盐度下显示出增加的C:N比率,模拟in situ条件.
- * 克洛洛莫纳斯种类 (Chloromonas spp.) 的一种 与Microglena spp.相比,它们对高光强度的适应性更好.
结论:
- * 雪藻菌株是心理友好型的,可以通过光化学和静态度的动态调整来适应不理想的现场条件.
- * 发现突出了雪藻对极端极地环境的适应能力,以及它们在生物地化学循环中的潜在作用.
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