Effects of ozone and acid rain on white pine (Pinus strobus) seedlings grown in five soils. I. Net photosynthesis and growth

1987 ◽  
Vol 65 (5) ◽  
pp. 977-987 ◽  
Author(s):  
Peter B. Reich ◽  
Anna W. Schoettle ◽  
Hans F. Stroo ◽  
John Troiano ◽  
Robert G. Amundson
Keyword(s):  
Acid Rain ◽  
Pinus Strobus ◽  
Net Photosynthesis ◽  
Plant Response ◽  
Factorial Experiments ◽  
White Pine ◽  
Physiological Processes ◽  
Pine Seedlings ◽  
Simulated Rain ◽  
Ozone Treatments

Four replicated factorial experiments were conducted to assess the response of potted white pine (Pinus strobus L.) seedlings to combined acid rain, ozone, and soil treatments. The objectives of the study were to quantify plant response to each pollutant alone and to determine whether the pollutants and edaphic factors interact in affecting physiological processes in white pine. In these studies, seedlings were grown in five forest soils and exposed for 4 months to realistic levels of acid rain and ozone. Acid rain treatments consisted of exposure to simulated rain of pH 5.6, 4.0, 3.5, or 3.0, while ozone treatments consisted of exposure to 0.02, 0.06, 0.10, or 0.14 ppm ozone. Minimal interaction between acid rain and ozone was observed with regard to photosynthesis or growth. Acid rain and soil type had a strong interaction in determining plant response. In general, acid rain caused increased growth and net photosynthesis as a result of nitrogen fertilization from the simulated rain. However, the extent of this response was inversely correlated with the availability of nitrogen in each soil. Ozone treatments caused decreased net photosynthesis in pine seedlings.

Effects of ozone and acid rain on white pine (Pinus strobus) seedlings grown in five soils. III. Nutrient relations

1988 ◽  
Vol 66 (8) ◽  
pp. 1517-1531 ◽  
Author(s):  
Peter B. Reich ◽  
Anna W. Schoettle ◽  
Hans F. Stroo ◽  
Robert G. Amundson
Keyword(s):  
Acid Rain ◽  
Pinus Strobus ◽  
Soil Surface ◽  
White Pine ◽  
Zn And Cu In ◽  
Simulated Rain ◽  
Major Nutrients ◽  
Frequent Exposure ◽  
Nutrient Relations ◽  
Mn Concentrations

The effects of acid rain and ozone on nutrient relations of white pine (Pinus strobus L.) were assessed for potted seedlings grown in each of five forest soils. Ozone treatments consisted of frequent exposure to 0.02, 0.06, 0.10, or 0.14 ppm ozone, while acid rain treatments consisted of exposure to simulated rain of pH 5.6, 4.0, 3.5, or 3.0. Plants were treated with all combinations of acid rain and ozone levels, and treatments were administered for 4 months. Acid rain caused significant leaching of Ca, Mg, K, Mn, Zn, and Cd from leaf litter on the soil surface, and soil Mg and K content declined as well. Concentrations in needles of N, P, K, Ca, Mn, Cd, and Cr were significantly increased as a result of acid rain treatments. In roots, concentrations of N, Mn, Cd, and Cr were significantly elevated as a result of acid rain. Similar increasing but nonsignificant trends were observed for Mg, Zn, and Cu in needles and for P, K, Mg, Ca, and Cu in roots. However, despite the increases in all the major nutrients, the nutrient weight proportions of K:N, P:N, Ca:N, and Mg:N generally declined in pine tissue as a result of acid rain. Although the above relationships were relatively consistent for pine in all soils, significant differences between soils in response to acid rain were observed for some elements. Ozone had significant effects on K, Ca, and Mn concentrations, and interactions between acid rain and ozone were observed for these three elements. In general, the results of these experiments suggest that the effects of acid rain on tree nutrition may be roughly similar in different soils but that the effects on physiology and growth will be heavily influenced by specific soil properties.

Erratum: Effects of ozone and acid rain on white pine (Pinus strobus) seedlings grown in five soils. I. Net photosynthesis and growth

1988 ◽  
Vol 66 (1) ◽  
pp. 207-207
Author(s):  
Peter B. Reich ◽  
Anna Schoettle ◽  
Hans F. Stroo ◽  
John Troiano ◽  
Robert G. Amundson
Keyword(s):  
Acid Rain ◽  
Pinus Strobus ◽  
Net Photosynthesis ◽  
White Pine

Effects of ozone and acid rain on white pine (Pinus strobus) seedlings grown in five soils. II. Mycorrhizal infection

1988 ◽  
Vol 66 (8) ◽  
pp. 1510-1516 ◽  
Author(s):  
Hans F. Stroo ◽  
Peter B. Reich ◽  
Anna W. Schoettle ◽  
Robert G. Amundson
Keyword(s):  
Acid Rain ◽  
Nitrogen Concentration ◽  
Pinus Strobus ◽  
Simulated Acid Rain ◽  
Mycorrhizal Infection ◽  
White Pine ◽  
Available Nitrogen ◽  
Mycorrhizal Roots ◽  
Simulated Rain ◽  
Highly Correlated

Mycorrhizal infection of white pine (Pinus strobus L.) seedlings was measured after 4 months of exposure to simulated acid rain and ozone, applied either alone or in combination. Increasing rain acidity consistently reduced the number of mycorrhizal short roots. In general, infection decreased linearly versus rain pH. Plants exposed to simulated rain at pH 3.0 had approximately 20% fewer mycorrhizal roots than plants exposed to pH 5.6 rain. The decrease in the number of mycorrhizal roots was a result of decreases both in the number of short roots available for infection and in the percentage of roots infected. Ozone had no effect on mycorrhizal infection if applied 3 alternate days/week at concentrations ranging from 0.02 to 0.14 ppm. However, there were significant changes in infection in plants exposed to ozone for 5 days/week. There was no evidence for an interaction between the two pollutants. Percent mycorrhizal infection was highly correlated with seedling nitrogen concentration across all soil types and rain treatments. These observations suggest that increases in available nitrogen may have been largely responsible for the observed effects of acid rain on mycorrhizae.

scholarly journals Growth and Injury Patterns of Eastern White Pine (Pinus strobus L.) Seedlings as Affected by Hardwood Overstory Density and Weeding Treatments

2004 ◽  
Vol 21 (2) ◽  
pp. 61-68 ◽  
Author(s):  
Jerome A. Krueger ◽  
Klaus J. Puettmann
Keyword(s):  
Pinus Strobus ◽  
Height Growth ◽  
White Pine Blister Rust ◽  
Injury Patterns ◽  
White Pine ◽  
Blister Rust ◽  
Pine Seedlings ◽  
Growing Conditions ◽  
Growth Of Seedlings ◽  
White Pine Weevil

Abstract White pine seedlings were underplanted under a range of overstory densities in a hardwood stand in northern Minnesota. Vegetation surrounding seedlings was left untreated (control), weeded annually, or completely removed through monthly weeding. After 4 years, the benefit of weeding woody competition for diameter growth of seedlings was limited to areas with relatively open overstory conditions. Seedling height growth was reduced in areas with higher overstory density, but improved through weeding treatments that removed woody vegetation. The removal of herbaceous vegetation did not improve growth of seedlings in any conditions. Open growing conditions created by overstory removal and weed control resulted in higher incidences of seedling injuries, e.g., through infection by white pine blister rust. Conditions for pine bark adelgids also were enhanced in areas with low overstory densities and weeding treatments. The incidence for white pine weevil seems to follow a similar pattern, although the number of trees infected was minimal. Results show that improving growing conditions through management of the overstory and understory vegetation improves seedling growth rates, but must be balanced with potentially higher incidences of seedling injuries under more open conditions.

Effects of radiation from 14CO2 absorbed by Pinus strobus L. seedlings during photosynthesis on their subsequent growth and metabolism

1968 ◽  
Vol 46 (8) ◽  
pp. 919-923 ◽  
Author(s):  
D. J. Ursino ◽  
V. Slankis ◽  
G. Krotkov
Keyword(s):  
Radiation Damage ◽  
Closed System ◽  
Dark Respiration ◽  
Pinus Strobus ◽  
Fresh Weight ◽  
Subsequent Growth ◽  
White Pine ◽  
Pine Seedlings ◽  
Time Of Year ◽  
Effects Of Radiation

Several times during the year, white pine seedlings were placed in a closed system and each plant was permitted to photo-assimilate 400–500 μCi of 14CO2. At various periods of time after photo-assimilation, the fresh weight, apparent photosynthesis, dark respiration, and distribution of absorbed 14C throughout the seedlings were determined. The location and magnitude of depressed growth caused by the radiation from the incorporated 14C varied with the time of year when photo-assimilation occurred.When 14CO2 photo-assimilation occurred in May and June, suppression of growth was the greatest in the new shoots, whereas when photo-assimilation occurred in the fall, the suppression of growth was more pronounced in the roots. Seedlings which photo-assimilated 14CO2 in the fall appeared normal during winter but their buds failed to develop into new shoots the following spring.It is also suggested that a decrease in the rate of apparent photosynthesis may be used as an indicator of radiation damage brought about by the incorporated 14CO2.

White pine in the transition hardwood forest

1982 ◽  
Vol 60 (10) ◽  
pp. 2046-2053 ◽  
Author(s):  
David E. Hibbs
Keyword(s):  
New England ◽  
Shade Tolerance ◽  
Slow Growth ◽  
Pinus Strobus ◽  
Hardwood Forests ◽  
White Pine ◽  
Slow Growth Rate ◽  
Pine Seedlings ◽  
Pine Regeneration ◽  
Pine Stands

Eastern white pine (Pinus strobus) in central New England is found in pure stands and as a component of mixed hardwood -pine stands. In older mixed forests, this pine is emergent over the surrounding hardwood canopy. Owing to the only moderate shade tolerance and initial slow growth rate of pine, there has been frequent speculation about how pine could survive and grow in hardwood forests. Results presented here indicate that successful white pine regeneration is achieved (i) by group reproduction in dense hardwood stands (25 m2∙h−1) where the group acts as a buffer around a central and eventually surviving pine; (ii) by single pine seedlings if hardwood competition is not too severe (18 m2∙h−1); (iii) occasionally by advanced regeneration from a previous stand; and, (iv) in mature forests, by regeneration in larger canopy gaps.

Short-term changes in Pinus strobus sapling height/diameter ratios following partial release: testing the acclimative stem-form development hypothesis

2008 ◽  
Vol 38 (2) ◽  
pp. 181-189 ◽  
Author(s):  
Eric K. Zenner
Keyword(s):  
Pinus Strobus ◽  
Height Growth ◽  
White Pine ◽  
Stem Form ◽  
Mature Trees ◽  
Tree Stability ◽  
Growth Allocation ◽  
Pine Seedlings ◽  
Form Development ◽  
Partial Release

Following release, mature trees can acclimatively shift aboveground growth allocation from height to diameter at breast height (DBH) growth to adjust their stem form (reducing height/diameter ratio (HDR)) to better withstand increased wind stress. The purpose of this study was to determine if, over a 6-year period, 7- to 12-year-old eastern white pines ( Pinus strobus L.) also responded to different levels of partial release with (i) stem-form adjustments (reduced HDR) through growth-allocation shifts from height to DBH growth and (ii) lower HDR values (shorter heights) than for unreleased trees of the same DBH (“acclimative stem-form development hypothesis”). Over the 6-year postrelease period, juvenile white pine seedlings exhibited unsynchronized height and DBH growth response patterns that depended on their prerelease height growth. Height growth of faster growing white pines was temporarily reduced. Concurrently, DBH growth was enhanced with increasing release intensity. HDR reductions followed a fairly narrow and predictable trajectory, but HDR values of released trees were not lower than those of unreleased trees of the same DBH after 6 years. Juvenile white pine seedlings appear to maintain a balance among aboveground tree parts to enhance future tree stability, which may be an adaptive trait for moderately shade-tolerant species.

scholarly journals Root Exposure, Root Dipping, and Extended Spring Planting of White Pine Seedlings

1978 ◽  
Vol 54 (2) ◽  
pp. 84-87 ◽  
Author(s):  
R. E. Mullin
Keyword(s):  
Relative Humidity ◽  
Pinus Strobus ◽  
White Pine ◽  
Total Height ◽  
Pine Seedlings ◽  
Current Growth ◽  
Root Exposure ◽  
Planting Season ◽  
Spring Planting

A study was established to assess the effects of root exposure at time of planting on the performance of 3 + 0 white pine (Pinus strobus L.) seedlings. Stock was lifted weekly from April 22nd (1971) for 10 weeks, with and without root dipping in water, and exposed from 0-3 hours before planting. Survival, terminal growth (current leaders) and total heights were examined after five years.Exposure resulted in damage; affecting survival, current growth and total height at five years. However, survival was unaffected by exposures of up to two hours on days with relative humidity above 80%. Dipping in water was found to be ineffective.Extending the planting season with 'hot' planting (same day) resulted in reduction of terminal growth and total height. Survival was also reduced for dates following flushing.

scholarly journals Disentangling transcriptional responses in plant defense against arthropod herbivores

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Alejandro Garcia ◽  
M. Estrella Santamaria ◽  
Isabel Diaz ◽  
Manuel Martinez
Keyword(s):  
Regulatory Networks ◽  
Pieris Rapae ◽  
Meta Analysis ◽  
Plant Response ◽  
Plant Responses ◽  
Transcriptional Responses ◽  
Crop Species ◽  
Physiological Processes ◽  
Meta Analyses ◽  
Plant Herbivore

AbstractThe success in the response of a plant to a pest depends on the regulatory networks that connect plant perception and plant response. Meta-analyses of transcriptomic responses are valuable tools to discover novel mechanisms in the plant/herbivore interplay. Considering the quantity and quality of available transcriptomic analyses, Arabidopsis thaliana was selected to test the ability of comprehensive meta-analyses to disentangle plant responses. The analysis of the transcriptomic data showed a general induction of biological processes commonly associated with the response to herbivory, like jasmonate signaling or glucosinolate biosynthesis. However, an uneven induction of many genes belonging to these biological categories was found, which was likely associated with the particularities of each specific Arabidopsis-herbivore interaction. A thorough analysis of the responses to the lepidopteran Pieris rapae and the spider mite Tetranychus urticae highlighted specificities in the perception and signaling pathways associated with the expression of receptors and transcription factors. This information was translated to a variable alteration of secondary metabolic pathways. In conclusion, transcriptomic meta-analysis has been revealed as a potent way to sort out relevant physiological processes in the plant response to herbivores. Translation of these transcriptomic-based analyses to crop species will permit a more appropriate design of biotechnological programs.

Impact of Deer Browsing on Regeneration in Mixed Stands in Southern New England

1995 ◽  
Vol 12 (3) ◽  
pp. 115-120 ◽  
Author(s):  
David B. Kittredge ◽  
P. Mark S. Ashton
Keyword(s):  
New England ◽  
Tree Species ◽  
Sugar Maple ◽  
Red Maple ◽  
White Pine ◽  
Mixed Stands ◽  
Tree Species Composition ◽  
Southern New England ◽  
Pine Seedlings ◽  
Species Specific

Abstract Browsing preferences by white-tailed deer were evaluated for 6 tree species in northeastern Connecticut. Deer density averaged 23/mile². Deer exhibited no species-specific preferences for seedlings greater than 19 in. For seedlings less than 19 in., hemlock and black birch were preferred. Red maple, sugar maple, and white pine seedlings were avoided. Red oak seedlings were neither preferred nor avoided. A much higher proportion of seedlings greater than 19.7 in. in height was browsed, regardless of species. Browsing preferences for species in the smaller seedling class, combined with a lack of preference for species in the larger class may result in future stands with less diverse tree species composition. Deer densities in excess of 23/mile² may be incompatible with regeneration of diverse forests in southern New England. North. J. Appl. For. 12(3):115-120.

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