Harmful effects of atmospheric nitrous acid on the physiological status of scots pine trees
Environmental Pollution Volume 147 Issue 3
Page 532-534
published_at 2007-06
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| File | |
| Title ( eng ) |
Harmful effects of atmospheric nitrous acid on the physiological status of scots pine trees
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| Creator |
Cape J. Neil
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| Source Title |
Environmental Pollution
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| Volume | 147 |
| Issue | 3 |
| Start Page | 532 |
| End Page | 534 |
| Abstract |
An open top chamber experiment was carried out in the summer of 2003 to examine the effect of nitrous acid (HONO) gas on the physiological status of Scots pine saplings (Pinus sylvestris). Four-year-old pine trees were exposed to two different levels of HONO gas (at ca. 2.5 ppb and 5.0 ppb) and a control (filtered air) from early evening to early morning (18:00–6:00), in duplicate open top chambers. Significant decreases in the ratios of chlorophylls a to b, an increase in the carbon to nitrogen (C/N) ratio, and a reduction of maximum yield of PS II (Fv/Fm) in pine needles were also observed after the 2 months' fumigation. Cation contents of pine needles were also decreased by the fumigation with HONO gas. The results could be explained by the harmful effects of OH radicals, generated from photolysis of HONO gas, and/or aqueous phase HONO (NO2-/HONO), on the photosynthetic capacity of pine needles.
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| Keywords |
HONO
OH radical
Scots pine
Open top chamber
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| NDC |
Construction. Civil engineering [ 510 ]
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| Language |
eng
|
| Resource Type | journal article |
| Publisher |
Elsevier Science Ltd
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| Date of Issued | 2007-06 |
| Rights |
Copyright (c) 2007 Elsevier Ltd
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| Publish Type | Author’s Original |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0269-7491
[DOI] 10.1016/j.envpol.2007.02.012
[NCID] AA10664567
[DOI] http://dx.doi.org/10.1016/j.envpol.2007.02.012
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