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首页> 外文期刊>Mycologia >TOLERANCE TO HIGH TEMPERATURE AND SALT STRESS BY A SALT MARSH ISOLATE OF AUREOBASIDIUM PULLULANS
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TOLERANCE TO HIGH TEMPERATURE AND SALT STRESS BY A SALT MARSH ISOLATE OF AUREOBASIDIUM PULLULANS

机译：金黄色葡萄球菌盐沼分离物对高温和盐胁迫的耐受性

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摘要

When cells of a salt marsh isolate of Aureobasidium pullulans were shifted from 25 C to 35 C, a series of proteins was observed by gel electrophoresis to increase in synthesis over time in a manner consistent with the classic heat shock response. In contrast, salt shock of 4.5% NaCl resulted in the enhancement of only three of the 12 bands observed for heat shock, whereas a simultaneous exposure to temperature and salt stress, a common occurrence in temperate salt marshes, produced an intermediate pattern of enhanced bands. The stimulation in synthesis of these proteins by sublethal stress dosages correlated with the ability of cells to survive subsequent exposures to lethal stress conditions. Not only did exposure to sublethal temperature and salt pretreatments protect against lethal temperature and salt dosages, respectively, but the pretreatments also exhibited reciprocity in their protection; an elevated temperature pretreatment protected against a lethal salt dosage and an elevated salt pretreatment protected against a lethal temperature dosage. These physiological attributes are consistent with an active role for A. pullulans in salt marsh ecosystems. [References: 27]
机译：当Aureobasidium pullulans的盐沼分离物的细胞从25 C转移到35 C时，通过凝胶电泳观察到一系列蛋白质随着时间的推移以与经典的热激响应一致的方式增加了合成。相比之下，4.5％NaCl的盐冲击导致热冲击所观察到的12条谱带中只有3条增强，而同时暴露于温度和盐胁迫（温带盐沼中普遍发生）产生了增强谱带的中间模式。亚致死应激剂量对这些蛋白质合成的刺激与细胞在随后暴露于致死应激条件下存活的能力有关。暴露于亚致死温度和盐预处理不仅可以防止致死温度和盐剂量，而且预处理也表现出可逆性。高温预处理防止致命的盐剂量，而高温预处理防止致命的盐剂量。这些生理属性与盐沼生态系统中的A. Pullulans的积极作用相一致。 [参考：27]

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