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The response of some common Egyptian plants to ozone and their use as biomonitors

Abstract

Growth and physiological response of plants was shown to be an effective tool for O{sub 3}-biomonitoring. - Relative sensitivity of five common Egyptian plant species namely, Senecio vulgaris, Malva parviflora, Sonchus oleraceus, Medicago sativa and Melilotus indicus to elevated levels of ozone has been studied. The plants were exposed to charcoal filtered air (CFA) and different levels of O{sub 3} (50 and 100 ppb) for 5 h per day. The studied parameters were recorded for five consecutive days after fumigation. The foliar injury varied significantly among species in a dose-dependent manner. Severe injury symptoms were recorded on the leaves of M. sativa. With the exception of M. parviflora, all species exhibited significant increases in the percentage reduction of the above-ground dry weight as a result of reductions in both leaf and stem dry weights. M. sativa showed a marked reduction in its relative growth rate at elevated levels of O{sub 3}. The extent of chlorophyll a destruction was higher in both M. sativa and S. oleraceus than in the other species tested. No differences in the sensitivity of chlorophylls a+b and carotenoids to ozone levels were recorded in this work. Percentage reduction of ascorbic acid was higher in M. sativa  More>>
Authors:
Publication Date:
Aug 01, 2003
Product Type:
Journal Article
Resource Relation:
Journal Name: Environmental Pollution (1987); Journal Volume: 124; Journal Issue: 3; Other Information: DOI: 10.1016/S0269-7491(03)00045-9; PII: S0269749103000459; Copyright (c) 2003 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Subject:
54 ENVIRONMENTAL SCIENCES; AIR POLLUTION; ASCORBIC ACID; CAROTENOIDS; CHARCOAL; CHLOROPHYLL; LEAVES; OZONE; PLANT GROWTH; PROLINE; RECOMMENDATIONS; SENSITIVITY; SYMPTOMS; WEEDS
OSTI ID:
20651383
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0269-7491; ENPOEK; TRN: GB05R5749090968
Submitting Site:
GBN
Size:
page(s) 419-428
Announcement Date:
Nov 23, 2005

Citation Formats

El-Khatib, A A. The response of some common Egyptian plants to ozone and their use as biomonitors. United Kingdom: N. p., 2003. Web. doi:10.1016/S0269-7491(03)00045-9.
El-Khatib, A A. The response of some common Egyptian plants to ozone and their use as biomonitors. United Kingdom. doi:10.1016/S0269-7491(03)00045-9.
El-Khatib, A A. 2003. "The response of some common Egyptian plants to ozone and their use as biomonitors." United Kingdom. doi:10.1016/S0269-7491(03)00045-9. https://www.osti.gov/servlets/purl/10.1016/S0269-7491(03)00045-9.
@misc{etde_20651383,
title = {The response of some common Egyptian plants to ozone and their use as biomonitors}
author = {El-Khatib, A A}
abstractNote = {Growth and physiological response of plants was shown to be an effective tool for O{sub 3}-biomonitoring. - Relative sensitivity of five common Egyptian plant species namely, Senecio vulgaris, Malva parviflora, Sonchus oleraceus, Medicago sativa and Melilotus indicus to elevated levels of ozone has been studied. The plants were exposed to charcoal filtered air (CFA) and different levels of O{sub 3} (50 and 100 ppb) for 5 h per day. The studied parameters were recorded for five consecutive days after fumigation. The foliar injury varied significantly among species in a dose-dependent manner. Severe injury symptoms were recorded on the leaves of M. sativa. With the exception of M. parviflora, all species exhibited significant increases in the percentage reduction of the above-ground dry weight as a result of reductions in both leaf and stem dry weights. M. sativa showed a marked reduction in its relative growth rate at elevated levels of O{sub 3}. The extent of chlorophyll a destruction was higher in both M. sativa and S. oleraceus than in the other species tested. No differences in the sensitivity of chlorophylls a+b and carotenoids to ozone levels were recorded in this work. Percentage reduction of ascorbic acid was higher in M. sativa and S. oleraceus, compared with the other species studied. With respect to relative percentages of proline, there was a significant difference in the responses of plants to ozone. According to the ozone resistance (R%), measured as relative growth rate, the test species were arranged in the descending order: M. parviflora>M. Indicus>S. Vulgaris>S. Oleraceus>M. sativa. In M. sativa, both determinant and correlation coefficients are well reflected in the relationship between its physiological response, its performance and ozone levels, supporting its recommendation as a candidate for biomonitoring in Egypt.}
doi = {10.1016/S0269-7491(03)00045-9}
journal = {Environmental Pollution (1987)}
issue = {3}
volume = {124}
place = {United Kingdom}
year = {2003}
month = {Aug}
}