The effect of long‐term ozone exposure on injury in seedlings of red spruce (<i>Picea rubens</i> Sarg.)

Fincher, Jean; Alscher, Ruth G.

doi:10.1111/j.1469-8137.1992.tb01057.x

Cited by 27 publications

(13 citation statements)

References 34 publications

(27 reference statements)

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“…This could have been an important factor stressing the chamber trees. Fincher & Alscher (1992) concluded that peak summer temperatures which were similar to the peak temperatures we measured could have injured their trees. However, such changes in temperature must be common in open top chambers, but only a few studies show such low rates of photosynthesis.…”

Section: mentioning

confidence: 77%

Response to three seasons of elevated ozone in the progeny of healthy and unhealthy Norway spruce trees from a plantation with the ‘top dying’ syndrome

1999

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We tested a hypothesis that elevated ozone was an eliciting or contributing factor in outbreaks of the ' top dying ' (or ' subtop dying ') syndrome in Norway spruce (Picea abies). Progeny were used from open-pollinated trees within a stand with the ' top dying ' syndrome. The mother trees were classified in relation to the expression of the ' top dying ' syndrome, and progeny from the healthiest and least healthy thirds of the population were exposed to high and low concentrations of ozone for three seasons. Elevated ozone did not affect height growth of the trees. It did not measurably affect net photosynthesis, stomatal conductance or instantaneous water use efficiency. Chlorophyll and carotenoid contents were also not significantly affected by ozone concentration. In the first year, instantaneous water use efficiency was lower in the progeny of the unhealthy mother trees than in the healthy mother trees. Furthermore, the unhealthy mother trees tended to produce longer annual shoots and showed more winter damage at the end of the experiment. None of these parameters were related to ozone concentration in the atmosphere. These results do not support a hypothesis that elevated ozone is a significant contributory factor or an eliciting factor in the development of the syndrome.

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Section: mentioning

confidence: 77%

Response to three seasons of elevated ozone in the progeny of healthy and unhealthy Norway spruce trees from a plantation with the ‘top dying’ syndrome

1999

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“…On the other hand, chamber experiments with spruce seedlings (Freer-Smith et al 1989;Dobson et al 1990;Fincher and Alscher 1992), beans (Tingey and Hogsett 1985) and crops (Heck 1988) gave clear evidence that drought stress protected plants from 03 injury mainly through its influence on stomatal aperture. Field observations of Showman (1991) also indicate that foliar injury in 03 sensitive species was widespread in a moist year with low 03 levels, whereas injuries in a dry year with high 03 concentrations were rare.…”

Section: Discussionmentioning

confidence: 97%

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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“…Chamber experiments (Dobson et al 1990;Fincher and Alscher 1992;Manes et al 2001) and field studies (Wieser and Havranek 1993;Gerosa et al 2005, Manes et al 2007) indicated that drought stress protects plants from O 3 injury mainly by decreasing stomatal aperture and, consequently, stomatal flux of O 3 . However, only some forest species (Pinus ponderosa, Fagus sylvatica) have shown less O 3 -induced injury when subjected to water stress (Temple et al 1992;Davidson et al 1992), while this effect was not found in Picea abies (Le Thiec et al 1994).…”

Section: Introductionmentioning

confidence: 98%

Physiological responses of Quercus ilex Leaves to Water Stress and Acute Ozone Exposure Under Controlled Conditions

Vitale

Salvatori

Loreto

et al. 2007

Water Air Soil Pollut

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The combined effect of water stress and ozone (O 3 ) on stomatal O 3 flux, damage to photosynthesis, and detoxification by biogenic volatile organic compounds (BVOC) in Quercus ilex leaves was studied. A 4-weeks O 3 exposure (250 ppb, 4 h per day) caused a reduction of photosynthesis and stomatal conductance, which was fully recovered 1 week after the end of the treatment, in well-watered and water-stressed plants. Measurements of stomatal O 3 flux revealed a low stomatal flux of the pollutant, which became minimal after stomatal closure caused by water stress. An induction of volatile monoterpenes, important compounds in the O 3 scavenging system in Q. ilex, and a burst of lipoxygenase compounds (LOX), which are released as gaseous by-products of membrane peroxidation, was observed after 2-3 weeks of O 3 fumigation. However, these compounds were also released in control leaves that were exposed to ozone only briefly, to determine stomatal O 3 flux. The low stomatal flux that occurred in water stress conditions helped avoiding permanent damage to Q. ilex leaves, although during the O 3 treatment photosynthesis was severely limited by stomatal closure. In well-watered plants, O 3 fumigation caused a noticeable increase of nocturnal stomatal conductance. If confirmed on adult plants under field conditions, this effect can imply larger flux of O 3 at night and possible detrimental effects of O 3 on leaf functions in plants exposed to high nocturnal O 3 levels.

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The effect of long‐term ozone exposure on injury in seedlings of red spruce (Picea rubens Sarg.)

Cited by 27 publications

References 34 publications

Response to three seasons of elevated ozone in the progeny of healthy and unhealthy Norway spruce trees from a plantation with the ‘top dying’ syndrome

Response to three seasons of elevated ozone in the progeny of healthy and unhealthy Norway spruce trees from a plantation with the ‘top dying’ syndrome

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

Physiological responses of Quercus ilex Leaves to Water Stress and Acute Ozone Exposure Under Controlled Conditions

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