Light intensity and reactive oxygen species are centrally involved in photoregulatory responses during complementary chromatic adaptation in Fremyella diplosiphon
Light intensity and reactive oxygen species are centrally involved in photoregulatory responses during complementary chromatic adaptation in Fremyella diplosiphon
复制标题
光强度和活性氧主要参与双管芙蕾菌互补色适应过程中的光调节反应
DOI：
--
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
B. Montgomery
中科院分区：
文献类型：
--
作者：
K. J. Walters;Melissa J. Whitaker;S. Singh;B. Montgomery
光，包括光质量和光量或强度等特性，以及光相关因素，包括光依赖性、氧化应激相关的活性氧（ROS）积累，参与淡水蓝藻 Fremyella dilosiphon 细胞形态发生的光调节。尽管长期以来人们就注意到光质量的差异会影响双管镰刀菌的细胞形态和丝长度，但我们最近的研究结果表明光强度和光相关的 ROS 水平调节也与形态的变化相关。红光 (RL) 会诱导 ROS 积累，光强度增加也会引起这种情况，这两者都与细胞形状向球形的转变有关。由于当细胞从高 RL 强度转变为较低强度时，光强度增加对色素沉着、细胞 ROS 水平和形态的影响是可逆的，因此我们的累积结果表明光强度介导的 ROS 水平增加对细胞形态具有因果影响。
Light, including properties such as light quality and light quantity or intensity, and light-associated factors, including light-dependent, oxidative stress-associated accumulation of reactive oxygen species (ROS), are involved in the photoregulation of cellular morphogenesis in the freshwater cyanobacterium Fremyella diplosiphon. Although it has been long noted that differences in light quality can impact cellular morphology and filament lengths of F. diplosiphon, our recent findings indicate that light intensity and light-associated regulation of ROS levels are correlated with changes in morphology as well. Red light (RL) induces accumulation of ROS, as does an increase in light intensity, both of which are associated with a shift toward a more spherical cell shape. As the impacts of increased light intensity on pigmentation, cellular ROS levels and morphology are reversible when cells are shifted from high RL intensity to a lower intensity, our cumulative results suggest a causative impact of light-intensity mediated increases in ROS levels on cellular morphology.