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首页> 外文期刊>Journal of Plant Physiology >EFFECTS OF METHANOL ON PLANT RESPIRATION
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EFFECTS OF METHANOL ON PLANT RESPIRATION

机译：甲醇对植物呼吸作用的影响

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摘要

This study examined the effects of methanol on respiration in tissues of pepper (Capsicum annuum), tomato (Lycopersicon esculentum), and petunia (Petunia hybrida) as measured by metabolic heat rates. Metabolic heat rate increased on brief exposure to aqueous solutions containing less than toxic concentrations of methanol. The heat rate increase correlated with methanol concentration. Simultaneous measurement of metabolic heat, CO2, and O-2 rates of bell pepper leaf tissue suggested that exposure to methanol resulted in an increased carbon conversion efficiency. Exposure of a single leaf to methanol resulted in a systemic response throughout the plant within a few hours. The methanol-induced increase in metabolic rate in whole plants lasted for several weeks. Brief exposures to methanol concentrations greater than or equal to 30% were toxic to leaf tissue as shown by greatly decreased metabolic rates and waterlogged appearance. Root tissue was more sensitive than leaf tissue, showing toxicity when briefly exposed to 10 % methanol solution. The increased metabolic rate and efficiency may explain previous reports of increased productivity seen in some field studies. The complexity of the exposure-respiratory response relationship and differing tissue sensitivities found in this study probably explains the inability of others to reproduce the field responses originally reported.
机译：这项研究检查了甲醇对辣椒（辣椒），番茄（番茄）和矮牵牛（矮牵牛）组织呼吸的影响，以代谢热速率测量。短暂暴露于含有低于毒性浓度甲醇的水溶液时，代谢热速率增加。升温速率与甲醇浓度相关。同时测量甜椒叶组织的代谢热，CO2和O-2速率表明，暴露于甲醇可提高碳转化效率。将单片叶子暴露于甲醇会导致整个植物在数小时内发生系统性反应。甲醇诱导的整个植物新陈代谢速率的提高持续了数周。短暂地暴露于大于或等于30％的甲醇浓度对叶片组织有毒，新陈代谢速度大大降低和水渍出现表明。根组织比叶组织更敏感，当短暂暴露于10％甲醇溶液中时显示出毒性。代谢率和效率的提高可能解释了以前在某些田间研究中发现生产率提高的报道。在这项研究中发现的暴露-呼吸反应关系的复杂性和不同的组织敏感性可能解释了其他人无法重现最初报道的野外反应。

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