Paoletti Elena, Contran Nicla, Manning William J, Ferrara Anna M
IPP-CNR, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Florence, Italy.
Environ Pollut. 2009 May;157(5):1453-60. doi: 10.1016/j.envpol.2008.09.021. Epub 2008 Nov 1.
Twenty-four experiments where EDU was used to protect plants from ozone (O(3)) in Italy are reviewed. Doses of 150 and 450 ppm EDU at 2-3 week intervals were successfully applied to alleviate O(3)-caused visible injury and growth reductions in crop and forest species respectively. EDU was mainly applied as soil drench to crops and by stem injection or infusion into trees. Visible injury was delayed and reduced but not completely. In investigations on mode of action, EDU was quickly (<2h) uptaken and translocated to the leaf apoplast where it persisted long (>8 days), as it cannot move via phloem. EDU did not enter cells, suggesting it does not directly affect cell metabolism. EDU delayed senescence, did not affect photosynthesis and foliar nitrogen content, and stimulated antioxidant responses to O(3) exposure. Preliminary results suggest developing an effective soil application method for forest trees is warranted.
本文综述了在意大利进行的24项使用乙二醛肟（EDU）保护植物免受臭氧（O₃）伤害的实验。分别以150 ppm和450 ppm的剂量，每隔2 - 3周施用一次EDU，成功减轻了臭氧对农作物和森林物种造成的可见伤害，并减少了其生长受抑制的情况。EDU主要通过土壤浇灌施用于农作物，通过树干注射或输液施用于树木。可见伤害虽被延迟并减轻，但未完全消除。在作用方式的研究中，EDU被迅速（<2小时）吸收并转运到叶质外体，在那里它能长时间存在（>8天），因为它不能通过韧皮部移动。EDU不进入细胞，这表明它不会直接影响细胞代谢。EDU延缓了衰老，不影响光合作用和叶片氮含量，并刺激了对臭氧暴露的抗氧化反应。初步结果表明，有必要开发一种有效的林木土壤施用方法。
