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首页> 外文期刊>Russian Journal of Plant Physiology >Physiological aspects of adaptation of the marine microalga Tetraselmis (Platymonas) viridis to various medium salinity
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Physiological aspects of adaptation of the marine microalga Tetraselmis (Platymonas) viridis to various medium salinity

机译：海洋微藻绿藻（Platymonas viridis）对各种中等盐度适应的生理方面

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摘要

We studied the capability of the marine microalga Tetraselmis (Platymonas) viridis to adapt to low and high medium salinity. The normal NaCl concentration for growth of this alga is 0.5 M. It was shown that T viridis cells could actively grow and maintain osmoregulation and cytoplasmic ion homeostasis in the wide range of external salt concentrations, from 0.01 to 1.2 M NaCl. Using the plasma membrane vesicles isolated from T viridis cells crown at various NaCl concentrations (0.01, 0.05, 0.5, 0.9, and 1.2 M), we studied the formation of the phosphorylated intermediate of Na+-ATPase, the enzyme responsible for Na+ export from the cells with a mol wt of ca. 100 kD. Na+-ATPase was shown to function in the plasma membrane even in the cells growing at an extremely low NaCl concentration (0.01 M). When alga was grown in high-salt media, the synthesis of several proteins with molecular weights close to 100 kD was induced. The data obtained argue for the hypothesis, which was put forward earlier, that a novel Ne-ATPase isoform is induced by T viridis growing at high NaCl concentrations.
机译：我们研究了海洋微藻绿藻（Platymonas viridis）适应低盐和高盐度的能力。该藻类生长的正常NaCl浓度为0.5M。研究表明，在0.01到1.2 M NaCl的各种外部盐浓度范围内，绿藻T细胞可以主动生长并维持渗透调节和细胞质离子稳态。使用在各种NaCl浓度（0.01、0.05、0.5、0.9和1.2 M）下从T翠鸟细胞冠分离的质膜囊泡，我们研究了Na + -ATPase磷酸化中间体的形成，Na + -ATPase负责从NaCl出口Na +。摩尔重量为ca的细胞。 100 kD。即使在NaCl浓度极低（0.01 M）的细胞中，Na + -ATPase也能在质膜中起作用。当藻类在高盐培养基中生长时，诱导了几种分子量接近100 kD的蛋白质的合成。获得的数据证明了这一假说，该假说是早先提出的，一种新的Ne-ATPase同工型是由在高NaCl浓度下生长的拟南芥诱导的。

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