Potential of Detecting the Sulfur Dioxide Stress on Landscape Plants in Spectral Reflectance Data
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RESEARCH ARTICLE
Potential of Detecting the Sulfur Dioxide Stress on Landscape Plants in Spectral Reflectance Data Di Wang1,2 • Ziqi Liu1 • Yuanyong Dian1 • Zhixiang Zhou1 • Shenghui Fang2 Received: 4 November 2016 / Accepted: 9 October 2017 Ó Indian Society of Remote Sensing 2017
Abstract Sulfur dioxide (SO2) exhibits a powerful implication on the air condition and responsible for increasing the acidity of rainfall which plays negative effects on plant growth. It is a big problem to quantitatively access the stress degrees of sulfur dioxide on landscape plants. This study aims to find a non-destructive way to detect the degrees of SO2 stress by using the spectral reflectance data. Five different landscape plants were selected and a simulated SO2 stress environment by using fumigation box was built in this experiment. Landscape plants were grown on at this simulated SO2 environment, and the leaf reflectance, chlorophyll and sulfur concentration were measured at 0, 2, 4, 6, 8, 10 and 12 h respectively. The spectral, chlorophyll response of five different plants were examined and the red edge position (REP) shift obtained from the reflectance were used to evaluate the SO2 stress degrees at this paper. The results showed leaf chlorophyll content generally decreased and leaf sulfur content generally increased of all of these five landscape plants as though the chlorophyll and sulfur content disturbing during the whole stress time. However, compared with the sulfur content changed in leaves, chlorophyll content did not significantly changed when suffering from SO2. The shift of REP performed well to indicate the severity of SO2 fumigation stress and different species showed the different REP shift. The determined coefficient R2 of REP shift and the relative changed sulfur content in leaves can up to 0.85. And the results also indicated that the different species maintained different resistance to SO2. Keywords Spectral reflectance Sulfur dioxide stress Sulfur content of leaf Chlorophyll content Red edge position shift
Introduction With the rapid development of urbanization, more and more energy-intensive industries and factories were built, and as a result, much larger amounts of coal are being consumed than in the past (Tecer and Tagil 2014). And at the same time, vehicle ownership is growing and increasing the amounts of NOx and SO2 emitted into the atmosphere. Definitely, the air condition was worsening then before. Sulfur dioxide (SO2), a colorless, pungent odor pollutant widely distributed in the atmosphere plays a powerful implication on the air condition and responsible for & Yuanyong Dian [email protected] 1
College of Horticulture and Forestry, Huazhong Agriculture University, Shizishan Street, Wuhan 430070, China
2
School of Remote Sensing and Information Engineering, Wuhan University, 129 Luoyu Road, Wuhan 430079, China
increasing the acidity of rainfall. SO2 also played serious effects on plants growth especially landscape plants in urban (Tecer and Tagil 2014; Yan et al. 2014). Many studie
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