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首页> 外文期刊>Journal of Arboriculture >The use of chlorophyll fluorescence to identify chemical and environmental stress in leaf tissue of three oak (Quercus) species.
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The use of chlorophyll fluorescence to identify chemical and environmental stress in leaf tissue of three oak (Quercus) species.

机译：使用叶绿素荧光鉴定三种橡树（栎属）叶片组织中的化学和环境胁迫。

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During their lifetime, urban trees are susceptible to a range of environmental and chemical stresses that can result in tree decline. Chlorophyll fluorescence has been used as a nondestructive and noninvasive means of quantifying damage to the leaf photosynthetic system of deciduous and evergreen trees. This was conducted in UK to determine whether there were unique chlorophyll fluorescence profiles for different chemical (salt, herbicide) and environmental (heat) stresses in leaf tissue of three oak species (Quercus ilex, Q. robur and Q. rubra). The salinity treatment consisted of 60 g/litre NaCl distilled water solution applied as spray to the foliage until runoff. Foliar sprays of the herbicides atrazine, and DCMU were applied until runoff. Heat damage, on the other hand, was achieved by gently lifting five trees per species previously potted and placing whole trees in darkness in an environmental growth chamber for 5 minutes at 50 degrees C temperature. Results demonstrate that alterations in the OJIP curve as a measure of electron transport within the leaf plastoquinone pool of photosystem II could be used to identify tree decline due to herbicide and heat but not to salt damage. The benefits of this system to make rapid, stress-specific diagnosis in the field for professionals involved in urban tree management are discussed..
机译：在城市树木的一生中，它们容易受到一系列环境和化学压力的影响，这些压力可能导致树木衰落。叶绿素荧光已被用作量化落叶和常绿乔木叶片光合系统损害的非破坏性和非侵入性手段。这是在英国进行的，以确定三种橡树种（栎树（Quercus ilex），罗伯（Q. robur）和罗布斯（Q. rubra））的叶子组织中是否存在针对不同化学（盐，除草剂）和环境（热）胁迫的独特叶绿素荧光图。盐度处理包括以60 g / L的NaCl蒸馏水溶液喷洒到叶子上直至流失。叶面喷洒除草剂at去津和DCMU，直至径流。另一方面，通过将先前盆栽的每个树种轻轻举起五棵树，然后将整棵树在环境生长室中于50摄氏度的温度下放置在黑暗中5分钟，可以达到热破坏的目的。结果表明，OJIP曲线的变化可作为光电子系统II叶片质体醌库内电子传输的量度，可用于识别由于除草剂和热引起的树木衰落，但不能识别因盐害引起的树木衰落。讨论了该系统对参与城市树木管理的专业人员进行快速，针对特定压力的诊断的好处。

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