Elevated temperature differently affects foliar nitrogen partitioning in seedlings of diverse Douglas fir provenances
Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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Elevated temperature differently affects foliar nitrogen partitioning in seedlings of diverse Douglas fir provenances. / Du, Baoguo; Jansen, Kirstin; Junker, Laura Verena et al.
in: Tree Physiology, Jahrgang 34, Nr. 10, 01.10.2014, S. 1090-1101.Publikation: Beiträge in Zeitschriften › Zeitschriftenaufsätze › Forschung › begutachtet
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TY - JOUR
T1 - Elevated temperature differently affects foliar nitrogen partitioning in seedlings of diverse Douglas fir provenances
AU - Du, Baoguo
AU - Jansen, Kirstin
AU - Junker, Laura Verena
AU - Eiblmeier, Monika
AU - Kreuzwieser, Jürgen
AU - Gessler, Arthur
AU - Ensminger, Ingo
AU - Rennenberg, Heinz
PY - 2014/10/1
Y1 - 2014/10/1
N2 - Global climate change causes an increase in ambient air temperature, a major environmental factor influencing plant physiology and growth that already has been perceived at the regional scale and is expected to become even more severe in the future. In the present study, we investigated the effect of elevated ambient air temperature on the nitrogen metabolism of two interior provenances of Douglas fir (Pseudotsuga menziesii var. glauca) originating from contrasting habitats, namely the provenances Monte Creek (MC) from a drier environment and Pend Oreille (PO) from a more humid environment. Three- to four-year-old seedlings of the two provenances were grown for 3 months in controlled environments under either control temperature (day 20°C, night 15°C) or high temperature (HT, 30/25°C) conditions. Total nitrogen (N), soluble protein, chlorophyll and total amino acid (TAA) contents as well as individual amino acid concentrations were determined in both current-year and previous-year needles. Our results show that the foliar total N contents of the two provenances were unaffected by HT. Arginine, lysine, proline, glutamate and glutamine were the most abundant amino acids, which together contributed ∼88% to the TAA pool of current- and previous-year needles. High temperature decreased the contents of most amino acids of the glutamate family (i.e., arginine, proline, ornithine and glutamine) in current-year needles. However, HT did not affect the concentrations of metabolites related to the photorespiratory pathway, such as NH 4 +, glycine and serine. In general, current-year needles were considerably more sensitive to HT than previous-year needles. Moreover, provenance PO originating from a mesic environment showed stronger responses to HT than provenance MC. Our results indicate provenance-specific plasticity in the response of Douglas fir to growth temperature. Provenance-specific effects of elevated temperature on N-use efficiency suggest that origin might determine the sensitivity and growth potential of Douglas fir trees in a future warmer climate.
AB - Global climate change causes an increase in ambient air temperature, a major environmental factor influencing plant physiology and growth that already has been perceived at the regional scale and is expected to become even more severe in the future. In the present study, we investigated the effect of elevated ambient air temperature on the nitrogen metabolism of two interior provenances of Douglas fir (Pseudotsuga menziesii var. glauca) originating from contrasting habitats, namely the provenances Monte Creek (MC) from a drier environment and Pend Oreille (PO) from a more humid environment. Three- to four-year-old seedlings of the two provenances were grown for 3 months in controlled environments under either control temperature (day 20°C, night 15°C) or high temperature (HT, 30/25°C) conditions. Total nitrogen (N), soluble protein, chlorophyll and total amino acid (TAA) contents as well as individual amino acid concentrations were determined in both current-year and previous-year needles. Our results show that the foliar total N contents of the two provenances were unaffected by HT. Arginine, lysine, proline, glutamate and glutamine were the most abundant amino acids, which together contributed ∼88% to the TAA pool of current- and previous-year needles. High temperature decreased the contents of most amino acids of the glutamate family (i.e., arginine, proline, ornithine and glutamine) in current-year needles. However, HT did not affect the concentrations of metabolites related to the photorespiratory pathway, such as NH 4 +, glycine and serine. In general, current-year needles were considerably more sensitive to HT than previous-year needles. Moreover, provenance PO originating from a mesic environment showed stronger responses to HT than provenance MC. Our results indicate provenance-specific plasticity in the response of Douglas fir to growth temperature. Provenance-specific effects of elevated temperature on N-use efficiency suggest that origin might determine the sensitivity and growth potential of Douglas fir trees in a future warmer climate.
KW - Sustainability Science
KW - Amino acid
KW - Arginine
KW - Pseudotsuga menziesii
UR - http://www.scopus.com/inward/record.url?scp=84923516657&partnerID=8YFLogxK
U2 - 10.1093/treephys/tpu074
DO - 10.1093/treephys/tpu074
M3 - Journal articles
C2 - 25240727
VL - 34
SP - 1090
EP - 1101
JO - Tree Physiology
JF - Tree Physiology
SN - 0829-318X
IS - 10
ER -