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Tytuł pozycji:

Red maple (Acer rubrum L.) trees demonstrate acclimation to urban conditions in deciduous forests embedded in cities.

Tytuł :
Red maple (Acer rubrum L.) trees demonstrate acclimation to urban conditions in deciduous forests embedded in cities.
Autorzy :
McDermot CR; Department of Plant and Soil Sciences, University of Delaware, Newark, DE, United States of America.
Minocha R; USDA Forest Service, Northern Research Station, Durham, NH, United States of America.
D'Amico V 3rd; USDA Forest Service, Northern Research Station, Newark, DE, United States of America.
Long S; USDA Forest Service, Northern Research Station, Durham, NH, United States of America.
Trammell TLE; Department of Plant and Soil Sciences, University of Delaware, Newark, DE, United States of America.
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Źródło :
PloS one [PLoS One] 2020 Jul 24; Vol. 15 (7), pp. e0236313. Date of Electronic Publication: 2020 Jul 24 (Print Publication: 2020).
Typ publikacji :
Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.
Język :
English
Imprint Name(s) :
Original Publication: San Francisco, CA : Public Library of Science
MeSH Terms :
Acclimatization*
Parks, Recreational*
Acer/*physiology
Trees/*physiology
Chlorophyll/metabolism ; Delaware ; Forests ; Hot Temperature ; Metals, Heavy/analysis ; Metals, Heavy/metabolism ; Nitrogen/metabolism ; Philadelphia ; Plant Leaves/metabolism ; Soil/chemistry ; Urbanization
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Substance Nomenclature :
0 (Metals, Heavy)
0 (Soil)
1406-65-1 (Chlorophyll)
N762921K75 (Nitrogen)
Entry Date(s) :
Date Created: 20200725 Date Completed: 20200930 Latest Revision: 20200930
Update Code :
20210210
PubMed Central ID :
PMC7380610
DOI :
10.1371/journal.pone.0236313
PMID :
32706781
Czasopismo naukowe
The impacts of urbanization, such as urban heat island (UHI) and nutrient loads, can influence tree function through altered physiology and metabolism and stress response, which has implications for urban forest health in cities across the world. Our goal was to compare growth-stimulating and stress-mitigating acclimation patterns of red maple (Acer rubrum) trees in deciduous forests embedded in a small (Newark, DE, US) and a large (Philadelphia, PA, US) city. The study was conducted in a long-term urban forest network on seventy-nine mature red maple trees spanning ten forests across Newark and Philadelphia. We hypothesized that red maples in Philadelphia forests compared to Newark forests will be healthier and more acclimated to warmer temperatures, elevated CO2 concentrations and reactive nitrogen (Nr) deposition, and higher nutrient/heavy metal loads. Therefore, these red maples will have higher foliar pigments, nutrients, and stress-indicating elements, enriched δ15N isotopes and increased free polyamines and amino acids to support a growth-stimulating and stress-induced response to urbanization. Our results indicate red maples are potentially growth-stimulated and stress-acclimated in Philadelphia forests experiencing a greater magnitude of urban intensity. Red maples in Philadelphia forests contained higher concentrations of foliar chlorophyll, %N, δ15N, and nutrients than those in Newark forests. Similarly, lower foliar magnesium and manganese, and higher foliar zinc, cadmium, lead, and aluminum reflected the difference in soil biogeochemistry in Philadelphia forests. Accumulation patterns of foliar free amino acids, polyamines, phosphorous, and potassium ions in red maples in Philadelphia forests shows a reallocation in cellular metabolism and nutrient uptake pathways responsible for physiological acclimation. Our results suggest the approach used here can serve as a model for investigating 'plant physiology' and the use of urban trees as a biomonitor of the impacts of 'urban pollution' on urban forests. The results suggest that cellular oxidative stress in trees caused by pollutant uptake is mitigated by the accumulation of free amino acids, polyamines, and nutrients in a larger city. Our study provides a framework for determining whether trees respond to complex urban environments through stress memory and/or acclimation.
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