...
首页> 外文期刊>Mycologia >Differentiation and hydrogen peroxide production in Sclerotium rolfsii are induced by the oxidizing growth factors, light and iron
【24h】

Differentiation and hydrogen peroxide production in Sclerotium rolfsii are induced by the oxidizing growth factors, light and iron

机译:罗非鱼菌的分化和过氧化氢的产生是由氧化性生长因子,光和铁引起的

获取原文
获取原文并翻译 | 示例
           

摘要

Hydrogen peroxide is produced by Sclerotium rolfsii during sclerotial differentiation, in re; sponse to oxidative growth conditions of light and Fe. An additive effect of (+/- light +/- Fe)-induced oxidative stress is observed on H2O2 production levels and on sclerotia numbers during fungal development. High H2O2 production rates are correlated with high oxidative stress and are observed in less lipid-peroxidized young mycelia and sclerotia (sclerotia initials and early developing sclerotia) and not in differentiated, highly lipid-peroxidized older mycelia and sclerotia (developed and mature sclerotia). H2O2 production by undifferentiated mycelia and their exposure to exogenous H2O2 show a rate/dose-dependent correlation with degree of sclerotial differentiation (sclerotia numbers). Hydrogen peroxide and lipid peroxide concentration gradients are observed in fungal colonies during their transition from undifferentiated (mycelial) to differentiated (sclerotial) stage. Growth-stage-dependent changes in H2O2 production rates during development are not due to changes in glucose concentration and pH of the growth medium. Light/Fe-induced H2O2 production and its effect on S. rolfsii differentiation, are discussed in the context of our hypothesis of oxidative stress-induced sclerotial differentiation. [References: 44]
机译:过氧化氢是由菌核菌在菌核分化过程中产生的。响应光和铁的氧化生长条件。在真菌发育过程中,观察到了(+/-光+/- Fe)诱导的氧化应激对H2O2产生水平和菌核数的累加效应。高H2O2产生速率与高氧化应激相关,并且在较少脂质过氧化的年轻菌丝和菌核(菌核初始和早期发育的菌核)中观察到,而在分化程度高,脂质过氧化的较早菌丝和菌核(发育和成熟菌核)中观察不到。未分化的菌丝体产生的H2O2及其暴露于外源H2O2的速率/剂量依赖性与菌核分化程度(菌核数)相关。在真菌菌落从未分化(菌丝体)到分化(菌核)阶段的过渡过程中,观察到过氧化氢和脂质过氧化物的浓度梯度。发育过程中H2O2产生速率取决于生长阶段的变化不是由于葡萄糖浓度和生长培养基pH的变化所致。在我们氧化应激诱导的硬化分化的假设的背景下,讨论了光/铁诱导的H2O2的产生及其对罗氏链球菌分化的影响。 [参考:44]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号