Some effects of long-term ozone fumigations on Norway spruce

Keller, Th.; Häsler, R.

doi:10.1007/bf00203581

Cited by 41 publications

(12 citation statements)

References 19 publications

(10 reference statements)

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“…Yang et al (1983) found that the transpiration was increased in two of three clones of eastern white pine exposed to 200-600 ~tg m -3 ozone for 5 h. Keller and H~isler (1987) observed a similar clone-dependent effect on Norway spruce; the transpiration was inhibited in one clone and unaffected in another clone. Barnes et al (1990b) observed an increase in the transpiration of current-year and 1-year-old needles in Norway spruce exposed to an ozone concentration of 156 gg m -3 for two seasons.…”

Section: Offprint Requests To: G Wallinmentioning

confidence: 63%

The influence of ozone on the stomatal and non-stomatal limitation of photosynthesis in Norway spruce, Picea abies (L.) Karst, exposed to soil moisture deficit

Wallin

Skärby

1992

Trees

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Summary. Norway spruce, Picea abies (L.) Karst., was exposed to charcoal-filtered air (CF) and non-filtered air + ozone (NF+) and periods of soil moisture deficit from 1985 to 1988 in open-top chambers. Net photosynthesis, stomatal conductance, needle water potential and various shoot properties were measured on 1-year-old shoots during a period of soil moisture deficit. The gas exchange was measured at saturating photosynthetic photon flux density and across a range of CO2 concentrations. The soil moisture deficit induced a mild drought stress in the plants, expressed by a pre-dawn needle water potential of approximately -0.9 MPa and a substantial reduction in net photosynthesis and gas phase conductance. In the CF treatment, intercellular CO2 concentration was reduced, but was unaffected in the NF+ treatment. Furthermore, net photosynthesis declined more in response to the soil moisture deficit in the NF+ treatment than in the CF treatment. This is suggested to be attributed to the carboxylation efficiency at the operating point, which was decreased by 47% and 64% in shoots from the CF and the NF+ treatments, respectively. Stomatal limitation of net photosynthesis was increased by drought by 24-45% in the CF treatment, while it was unaffected in the NF+ treatment. Thus, our results imply that the coupling between the stomatal conductance and the photosynthetic rate was changed and that the marginal cost of water per given amount of carbon gain will increase in trees exposed to ozone, during periods of drought.

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Section: Offprint Requests To: G Wallinmentioning

confidence: 63%

The influence of ozone on the stomatal and non-stomatal limitation of photosynthesis in Norway spruce, Picea abies (L.) Karst, exposed to soil moisture deficit

Wallin

Skärby

1992

Trees

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“…Light (Davis and Wood 1973), relative humidity (Jensen and Roberts 1986), 03 concentration and dose (Reich 1987) and even genotype (Coyne and Bingham 1982;Keller and H~isler 1987) are some of the known factors that influenced the effect of 03 on stomatal conductance in chamber experiments.…”

Section: Discussionmentioning

confidence: 99%

Ozone uptake in the sun and shade crown of spruce: quantifying the physiological effects of ozone exposure

Wieser

Havranek

1993

Trees

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Summary. The uptake of air pollutants depends both on pollutant concentration and on stomatal conductance. This paper deals with the uptake of ozone (03) from the air into the needles of Norway spruce [Picea abies (L.) Karst.] under ambient climatic conditions. Regulation of 03 uptake by the stomata is shown and also the difference b~-tween the "physiologically active 03 concentration" and the 03 concentration of the ambient air. Data from the sun and shade crown of spruce trees at 1000 m a. s. 1. are presented. Analysis of data from three vegetation periods has shown that at low ambient 03 concentrations the 03 uptake is largely regulated by stomatal conductance. Water vapour pressure deficit (VPD) of the atmosphere is the climatic factor which showed the highest positive correlation with 03 concentration. However, a high leaf-air VDP led to stomatal closure, thus reducing the 03 uptake in the needles despite high 03 concentrations in the ambient air. The potential 03 stress caused by high 03 concentrations can be strongly mitigated by this natural closing of the stomata and the simultaneous occurrence of moderate drought stress.

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“…Table 2 shows relative variations of K concentrations in guard cells for the Gerardmer and Istebna clones under the influence of the different stresses, and also the values of the corresponding stomatal conductance. However, it appears that the stomatal responses in Norway spruce when exposed to one or other of these stresses can vary in importance according to the clone (Keller and Hasler 1987;Ebel et al 1990;Dotzler and Schiitt 1990;Fuhrer et al 1990;Pfirmann et al 1990;Blanck et al 1990). Our potassium analyses indicated the same changes as found by Pearson and Mansfield (1993) when they studied stomatal resistance in beech.…”

Section: Discussionmentioning

confidence: 96%

Alteration of element contents in guard cells of Norway spruce (Picea abies) subjected to ozone fumigation and (or) water stress: X-ray microanalysis study

Thiec¹,

Rose²,

Garrec³

et al. 1994

Can. J. Bot.

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L~, P. 1994. Alteration of element contents in guard cells of Norway spruce (Picea abies) subjected to ozone fumigation and (or) water stress: X-ray microanalysis study. Can. J. Bot. 72: [86][87][88][89][90][91][92]. Two clones of Norway spruce Picea abies (L.) Karst. (Gerardmer clone and Istebna clone) were subjected to an ozoneenriched atmosphere. The X-ray microanalysis of elements present in the guard cells showed a decrease in potassium for the Gerardmer clone along with a larger closing of guard cells and an increase in calcium contents; for the Istebna clone, ozone did not affect these contents. When a drought stress was applied, an increase in calcium content of guard cells of the Istebna clone was also found. However, the potassium content was smaller in this case for the two clones and could well be due to stomata1 closure. When ozone and drought stress were applied together, the potassium content in the Istebna clone was not affected, but for the Gerardmer clone, ozone reduced the decrease in potassium content that occurred as drought stress developed. However, calcium (and manganese) content increased significantly when the Gerardmer clone was exposed to ozone. It seems likely that the Gerardmer clone is sensitive to ozone and when subjected to a drought stress this sensitivity is increased. For the Istebna clone, the resistance to ozone is unaffected by the drought stress treatment. The Istebna clone, however, seems sensitive to drought. These characteristic responses in the two different Norway spruce clones are probably due to genetic differences and may explain the contradictory observations in the response of the stomata during the simultaneous implementation of the complex stresses. et L O O S V E L~, P. 1994. Alteration of element contents in guard cells of Norway spruce (Picea abies) subjected to ozone fumigation and (or) water stress: X-ray microanalysis study. Can. J. Bot. 72: 86-92. Deux clones de Picea abies (L.) Karst. (GCrardmer et Istebna) ont Ct C soumis i une atmosphkre enrichie en ozone. Lamicroanalyse X des ClCments presents dans les stomates a montrC une baisse des teneurs en potassium en relation avec une fermeture plus importante des stomates et une augmentation en calcium, ceci pour le clone GCrardmer; pour le clone Istebna, I'ozone n'affecte pas les teneurs de ces deux ClCments. Lorsqu'un stress hydrique est appliquC, une augmentation des teneurs en calcium dans les stomates du clone Istebna est enregistrke mais les teneurs en potassium sont plus faibles pour les deux clones dans ces conditions en relation avec une fermeture des stomates. Lorsque les deux traitements, ozone et stress hydrique sont appliquCs simultantment, les teneurs en potassium n'holuent pas par rapport au traitement stress hydrique pour le clone Istebna, mais pour le clone Gerardmer, I'ozone rtduit la baisse en potassium qui se produit lors du stress hydrique. Par contre les teneurs en calcium (et manganbse) augmentent considCrablement pour le clone GCrardmer par rapport au traitement ozone.Le clone GCrard...

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Some effects of long-term ozone fumigations on Norway spruce

Cited by 41 publications

References 19 publications

The influence of ozone on the stomatal and non-stomatal limitation of photosynthesis in Norway spruce, Picea abies (L.) Karst, exposed to soil moisture deficit

The influence of ozone on the stomatal and non-stomatal limitation of photosynthesis in Norway spruce, Picea abies (L.) Karst, exposed to soil moisture deficit

Ozone uptake in the sun and shade crown of spruce: quantifying the physiological effects of ozone exposure

Alteration of element contents in guard cells of Norway spruce (Picea abies) subjected to ozone fumigation and (or) water stress: X-ray microanalysis study

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