An Overview of Responses of Southern Pines to Airborne Chemical Stresses

Berrang, P.; Meadows, James S.; Hodges, Don

doi:10.1007/978-1-4612-0809-9_6

Cited by 6 publications

(6 citation statements)

References 175 publications

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“…Evaluation of the effects of secondary pollutants generated from NO x on terrestrial ecosystems is an important problem. The possibility of negative effects of nitrogen oxides (NO x ) on vegetation has been suggested, but there has been little research aimed specifically at the effects of atmospheric NO x (Berrang et al , 1995). A significant correlation has been observed between atmospheric NO x concentration (which is on average lower than 30 ppb) and tree decline (Naemura et al , 1997).…”

Section: Introductionmentioning

confidence: 99%

Harmful effects of radicals generated in polluted dew on the needles of Japanese Red Pine (Pinus densiflora)

Kume

Arakaki²,

Tsuboi

et al. 2001

New Phytologist

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The effects of free radicals, ·OH and ·NO, generated in polluted dew water on needles of Pinus densiflora (Japanese Red pine) were investigated. • ·OH-generating solutions (HOOH with Fe(III) and oxalate ion; ·OH treatment) and ·OH-and ·NO-generating solutions (NO 2 -; ·OH/·NO treatment) were regulated at 25, 50 and 100 µmol and pH 4.4. HOOH only (HOOH treatment) was used as a control solution. Solutions were applied as a mist to the needle surface of P. densiflora seedlings before dawn twice a week for 3 months.• Within a month, net photosynthesis at near saturating irradiance ( Pn ) and stomatal conductance ( gl ) of ·OH-treated needles decreased with increasing solution concentration. The HOOH treatment had no effects on any of the measured parameters. Therefore, ·OH in the artificial dews caused the decreases in Pn and gl . In ·OH/·NO-treated needles, gl increased during the experiment, but Pn was unchanged. In all experiments, the characteristics of PSII were not significantly altered.• Free radicals in polluted dew water have harmful effects on the photosynthesis of P. densiflora and compound effects of ·OH and ·NO are different.

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Section: Introductionmentioning

confidence: 99%

Harmful effects of radicals generated in polluted dew on the needles of Japanese Red Pine (Pinus densiflora)

Kume

Arakaki²,

Tsuboi

et al. 2001

New Phytologist

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“…Laboratory studies on effects of various toxic gases on coniferous trees also revealed no injuries from nitrogen oxides ( Rozhkov and Mikhailova 1993). Nevertheless nitrogen oxides can give rise to secondary products, such as photochemical oxidants (ozone, PAN, and PPN); the impact of these on forests is much stronger than that of nitrogen oxides themselves ( Smith 1985 ; Berrang et al. 1996 ).…”

Section: Discussionmentioning

confidence: 99%

The physiological condition of pine trees in the Prebaikalia (East Siberia)

Михайлова¹

2000

Forest Pathology

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Summary The condition of Scots pine (Pinus sylvestris) forests polluted by complex industrial emissions in the Prebaikalia region (East Siberia) is described using an eco‐physiological approach. Prebaikalia is one of the largest industrial areas of Russia. On 54 study plots the following needle parameters were measured: percentage of defoliation, protein nitrogen, nonprotein nitrogen, soluble carbohydrates, starch, aluminium, cadmium, calcium, copper, fluorine, iron, lead, magnesium, manganese, mercury, potassium, sodium, sulphur and zinc. The physiological condition of the pine tree stands was recorded on the basis of the protein nitrogen/nonprotein nitrogen ratio and the percentage of defoliation. Both parameters showed significant correlations with the accumulation of most pollutants. Five main damage classes were identified by a cluster analysis. The spatial distribution of these damage classes within the region is presented in a map.

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“…(1989), HANISCH u. KILZ (1990), FAENSEN-THIEBES et al (1991, MEYER et al (1992), BERRANG et al 1996und FAENSEN-THIEBES (1997 BES et al 1999). Es ist daher anzunehmen, dass das Mottling bei den einjährigen Nadeln des Jahrgangs 1991 und den ganz jungen Nadeln des Jahrgangs 1992 wie auch Teile des P-Symptoms durch Ozon verursacht worden sind.…”

Section: Diskussionunclassified