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가로수 수종별 잎의 미세먼지 축적량 및 금속 원소 함량 평가
권선주 ( Seon-ju Kwon ),차승주 ( Seung-ju Cha ),이주경 ( Joo-kyung Lee ),박진희 ( Jin Hee Park ) 한국응용생명화학회 2020 Journal of Applied Biological Chemistry (J. Appl. Vol.63 No.2
It is known that different plant species have ability to deposit different amounts of particulate matter (PM) on their leaves and plants can absorb heavy metals in PM through their leaves. Heavy metals in PM can have toxic effect on human body and plants. Therefore, PM on different roadside trees at Chungbuk national University including box tree (Buxus koreana), yew (Taxus cuspidate), royal azalea (Rhododendron yedoense), and retusa fringetree (Chionanthus retusa) was quantified based on particle size (PM<sub>>10</sub> and PM<sub>2.5-10</sub>). The metal concentration in PM accumulated on leaves was analyzed using inductively coupled plasma-mass spectroscopy. In this study, the mass of PM<sub>>10</sub> deposited on the surface of the tree leaves ranged from 6.11 to 32.7 μg/cm<sup>2</sup>, while the mass of PM<sub>2.5-10</sub> ranged from 0 to 14.8 μg/ cm<sup>2</sup>. The royal azaleas with grooves and hair on the leaf surface retained PM particles for longer time, while the yews and box trees with wax on leaf surfaces accumulated more PM. The PM contained elements in crustal material such as Al, Ca, Mg, and Fe and heavy metals including Cu, Pb and Zn. The concentration of elements in crustal material was higher in the coarser size, while heavy metal concentration was relatively higher in the finer size fraction. The Mn, Cd, Cu, Ni, Pb, and Zn concentrations of leaves and PM<sub>2.5-10</sub> were significantly correlated indicating that PM was taken up through tree leaves.
브로콜리(Brassica oleracea var. italica)의 온도 스트레스 평가를 위한 다중 센서 모니터링
차승주 ( Seung-ju Cha ),박현준 ( Hyun Jun Park ),이주경 ( Joo-kyung Lee ),권선주 ( Seon-ju Kwon ),지효경 ( Hyo-kyung Jee ),백현 ( Hyun Baek ),김한나 ( Han-na Kim ),박진희 ( Jin Hee Park ) 한국응용생명화학회 2020 Journal of Applied Biological Chemistry (J. Appl. Vol.63 No.4
Several sensors have been developed for soil and plants to assess plant stress due to climate change. Therefore, the objective of the study is to nondestructively evaluate temperature stress on plant by monitoring climatic and soil conditions and plant responses using various sensors. Plant responses were monitored by electrical conductivity in plant stem and sap flow rate. Electrical conductivity in plant stem reflects the physiological activity of plants including water and ion transport. Fully grown Brassica oleracea var. italica was exposed to 20/15 ℃ (day/night) with 16 h photoperiods as a control, low temperature 15/10 ℃, and high temperature 35/30 ℃ while climatic, soil, and plant conditions were monitored. Electrical conductivity in plant stem and sap flow rate increased during the day and decreased at night. Under low temperature stress, electrical conductivity in plant stem of Brassica oleracea var. italica was lower than control while under high temperature stress, it was higher than control indicating that water and ion transport was affected. However, chlorophyll a and b increased in leaves subjected to low temperature stress and there was no significant difference between high temperature stressed leaves and control. Free proline contents in the leaves did not increase under low temperature stress, but increased under high temperature stress. Proline synthesis in plant is a defense mechanism under environmental stress. Therefore, Brassica oleracea var. Italica appears to be more susceptible to high temperature stress than low temperature.