期刊
PLANT GROWTH REGULATION
卷 41, 期 2, 页码 173-177出版社
KLUWER ACADEMIC PUBL
DOI: 10.1023/A:1027358423187
关键词
calcium; Nicotiana tabacum; oxidation; phenols; synthesis
Given the essential role played by phenol metabolism in many resistance responses to different types of stress, the aim of the present work was to determine how different application rates of calcium may influence this metabolic process. Increased calcium in the nutrient solution in which tobacco plants were grown considerably reduced the foliar concentration of phenolic compounds. Calcium clearly exerted a positive influence on the activities of enzymes ( phenylalanine ammonia-lyase, polyphenol oxidase and peroxidase) involved in the metabolism of the phenolics. High dosages of calcium (5 mM) promoted more oxidation than synthesis of these compounds, thus explaining the lower concentration of the phenolics.
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