Version 1
: Received: 5 December 2019 / Approved: 6 December 2019 / Online: 6 December 2019 (11:26:57 CET)
How to cite:
Leung, F.; Pang, J.Y.S.; Tai, A.P.; Lam, T.; Tao, D.K.; Sharps, K. Evidence of Ozone-induced Visible Foliar Injury in Hong Kong using Phaseolus Vulgaris as an Ozone Bioindicator. Preprints2019, 2019120080. https://doi.org/10.20944/preprints201912.0080.v1
Leung, F.; Pang, J.Y.S.; Tai, A.P.; Lam, T.; Tao, D.K.; Sharps, K. Evidence of Ozone-induced Visible Foliar Injury in Hong Kong using Phaseolus Vulgaris as an Ozone Bioindicator. Preprints 2019, 2019120080. https://doi.org/10.20944/preprints201912.0080.v1
Leung, F.; Pang, J.Y.S.; Tai, A.P.; Lam, T.; Tao, D.K.; Sharps, K. Evidence of Ozone-induced Visible Foliar Injury in Hong Kong using Phaseolus Vulgaris as an Ozone Bioindicator. Preprints2019, 2019120080. https://doi.org/10.20944/preprints201912.0080.v1
APA Style
Leung, F., Pang, J.Y.S., Tai, A.P., Lam, T., Tao, D.K., & Sharps, K. (2019). Evidence of Ozone-induced Visible Foliar Injury in Hong Kong using Phaseolus Vulgaris as an Ozone Bioindicator. Preprints. https://doi.org/10.20944/preprints201912.0080.v1
Chicago/Turabian Style
Leung, F., Donald K.C. Tao and Katrina Sharps. 2019 "Evidence of Ozone-induced Visible Foliar Injury in Hong Kong using Phaseolus Vulgaris as an Ozone Bioindicator" Preprints. https://doi.org/10.20944/preprints201912.0080.v1
Abstract
Hong Kong is one of the most densely populated cities in the world, with millions of people exposed to severe air pollution. (1) Background: Surface ozone, mostly produced photochemically from anthropogenic precursor gases is harmful to both human and vegetation. The phytotoxicity of ozone has been shown to damage plant photosynthesis, induce early leaf death and retard growth. (2) Methods: We use genotypes of bush bean Phaseolus vulgaris with various degrees of sensitivity to ozone to investigate the impacts of ambient ozone on the morphology and development of the bean. We use ozone-induced foliar injury index and measure the flowerings and fruit production to quantify the ozone stress on the plants. (3) Results: We expected that the ozone-sensitive genotype would suffer from a reduction of yield. Results however show that the ozone-sensitive genotype suffers higher ozone-induced foliar damage as expected but produces more pods and beans and heavier beans than the ozone-resistant genotype. (4) Conclusions: It is postulated that the high ozone sensitivity of the sensitive genotype causes stress-induced flowering and therefore results in higher bean yield. A higher-than-ambient concentration of ozone is needed to negatively impact the yield production of the ozone-sensitive genotype. This study demonstrate the usefulness of bioindicators to monitor the phytotoxic effects of ozone pollution in a subtropical city such as Hong Kong.
Keywords
bioindicator; phaseolus vulgaris; ozone pollution
Subject
Environmental and Earth Sciences, Environmental Science
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
