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Ecophysiological and biochemical traits of Quercus ilex trees growing under urban stress conditions

机译：城市压力条件下生长的昆虫伊斯氏树木的生态学和生化特征

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摘要

The metabolic regulations of evergreen Mediterranean Quercus ilex trees growing at extra-urban and urban sites with different percentages of surrounding impervious pavements and distance to major traffic roads were investigated at the peak of the summer drought season. Plants from extra-urban site experienced lower water stress due to a fine regulation of reactive oxygen species (ROS, concomitant rise of anion superoxide and hydrogen peroxide content, +55 and +44%), abscisic acid and water soluble carbohydrates (+111 and +9%). The level of ROS was kept under the injury threshold by both enzymatic and metabolic antioxidants. Plants from the sub-urban site followed a different strategy, with a lower production of ROS and the concomitant reduction in phenols and carotenoids. Despite these differences, indications for stress-induced injury were not observed in any of the sites. Our work shows new relations between urban stress conditions and metabolic regulations of trees growing under such harsh environments.
机译：在夏季干旱季节的高峰期研究了在夏季干旱季节的高峰期进行了在夏季不透水路面和与主要交通道路距离不同百分比的城市和城市景点的常绿地中海昆虫岛欧莱克树木的代谢法规。来自外城区的植物经历了由于反应性氧物质的精细调节（ROS，阴离子超氧化物和过氧化氢含量，+ 55和+ 44％），脱落酸和水溶性碳水化合物（+111和+ 9％）。通过酶促和代谢抗氧化剂，在损伤阈值下保持ROS水平。来自子城市网站的植物遵循不同的策略，较低的ROS生产和伴随的酚类和类胡萝卜素的伴随。尽管存在这些差异，但在任何网站中未观察到应激诱导的损伤的适应症。我们的工作表明，在这种恶劣环境下，城市压力条件与树木的代谢法规的新关系。

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