当前位置: X-MOL 学术Plant Biol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Dust accumulation due to anthropogenic impact induces anatomical and photochemical changes in leaves of Centranthus ruber growing on the slope of the Vesuvius volcano.
Plant Biology ( IF 3.9 ) Pub Date : 2019-02-13 , DOI: 10.1111/plb.12966
V De Micco 1 , C Amitrano 1 , A Stinca 2 , L G Izzo 1 , E Zalloni 1 , A Balzano 1, 3 , R Barile 4 , P Conti 4 , C Arena 5
Affiliation  

In Mediterranean ecosystems, some natural areas are exposed to severe anthropogenic impact. Especially in summer, the considerable number of tourists visiting such areas, often with vehicles, causes deposition of dust over the vegetation due to formation of powder clouds, also favoured by wind erosion, high temperature, low precipitation and incoherent soil structure. The main aim of this study was to analyse whether the deposition of dust can induce changes in leaf anatomical functional traits and in the efficiency of photosynthetic apparatus in Centranthus ruber, a species widespread in Mediterranean ecosystems. Leaf morpho-functional traits were quantified in plants growing at sites characterised by high (HD) and low (LD) dust deposition, in periods with high anthropogenic impact. Analyses included quantification of chlorophyll fluorescence emission parameters, photosynthetic pigment concentration as well as stomatal size and frequency, leaf lamina thickness, quantification of intercellular spaces and phenolics in the mesophyll through microscopy. The overall analysis suggested that the different conditions of dust deposition induced different adjustment of morpho-functional traits in leaves of C. ruber. High dust deposition shielded the leaf lamina, protecting the photosynthetic apparatus from excess light and favoured plant photochemical efficiency. Leaves exposed to low dust deposition showed higher accumulation of phenolic compounds, protecting chloroplast membranes and characterised by high thermal dissipation of excess light. Such adaptive phenomena can affect vegetation dynamics due to possible different species-specific plant responses, resulting in different plant competitiveness under the limiting conditions of Mediterranean environments.

中文翻译:

由于人为影响而产生的粉尘积累导致维苏威火山斜坡上生长的中叶红叶的解剖和光化学变化。

在地中海生态系统中,一些自然地区受到严重的人为影响。尤其是在夏季,由于经常形成车辆,大量游客经常乘坐汽车前往该地区,从而导致粉尘在植被上沉积,此外还受到风蚀,高温,低降水和土壤结构不连贯的影响。这项研究的主要目的是分析尘埃的沉积是否可以引起地中海植物中广泛分布的红花森森(Centranthus ruber)的叶片解剖功能特征和光合装置效率的变化。在具有高人为影响的时期内,在以高(HD)和低(LD)尘埃沉积为特征的地点生长的植物中,对叶片的形态功能特征进行了量化。分析包括对叶绿素荧光发射参数,光合色素浓度以及气孔大小和频率,叶片薄层厚度,通过显微镜对叶肉中的细胞间空间和酚类进行定量的定量。总体分析表明,不同的粉尘沉积条件会导致棉铃虫叶片形态功能性状的不同调节。较高的灰尘沉积量可屏蔽叶片的叶片,从而保护光合作用设备免受过量光的照射,并有利于植物光化学效率的提高。暴露于低尘埃沉积下的叶片显示出较高的酚类化合物积累,保护了叶绿体膜,并具有大量多余光线的高散热性。
更新日期:2019-02-13
down
wechat
bug