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Title: Interactive effects of carbon dioxide and nitrogen supply on above-and belowground chemical composition of loblolly pine (Pinus taeda L.) seedlings

Abstract

Changes in the whole plant carbon/nitrogen balance of loblolly pine grown at ambient and elevated CO{sub 2}-levels (35 and 70 Pa) and four N levels (0.5, 1.5, 3.5 and 6.5 mM NH{sub 4}NO{sub 3}) were determined by measuring concentrations of total proteins, free amino acids, carbohydrates, and phenolic compounds. Free amino acids and protein concentrations increased with N availability in needles and lateral roots, but were unchanged in stems and tap roots. Under elevated CO{sub 2} starch content was increased in needles but not in roots or stems. Changes in phenolic content in response to elevated CO{sub 2} or N availability generally followed the pattern of soluble sugar concentrations. Phenolic content was in primary needles>lateral roots>tap roots>fascicular needles>stems and decreased with increasing N availability (at>1.5 mM NH{sub 4}NO{sub 3}). Phenolic content was significantly increased at 70 Pa CO{sub 2} only in needles and stems, but not in roots.

Authors:
; ;  [1]
  1. Duke Univ., Durham, NC (United States)
Publication Date:
OSTI Identifier:
107099
Report Number(s):
CONF-9507129-
Journal ID: BECLAG; ISSN 0012-9623; TRN: 95:006512-0015
Resource Type:
Journal Article
Resource Relation:
Journal Name: Bulletin of the Ecological Society of America; Journal Volume: 76; Journal Issue: 3; Conference: 80. anniversary of the transdisciplinary nature of ecology, Snowbird, UT (United States), 30 Jul - 3 Aug 1995; Other Information: PBD: Sep 1995
Country of Publication:
United States
Language:
English
Subject:
56 BIOLOGY AND MEDICINE, APPLIED STUDIES; CARBON DIOXIDE; BIOLOGICAL EFFECTS; NITROGEN; SEEDLINGS; CHEMICAL COMPOSITION; PINES

Citation Formats

Gebauer, R.L.E., Reynolds, J.F., and Strain, B.R.. Interactive effects of carbon dioxide and nitrogen supply on above-and belowground chemical composition of loblolly pine (Pinus taeda L.) seedlings. United States: N. p., 1995. Web.
Gebauer, R.L.E., Reynolds, J.F., & Strain, B.R.. Interactive effects of carbon dioxide and nitrogen supply on above-and belowground chemical composition of loblolly pine (Pinus taeda L.) seedlings. United States.
Gebauer, R.L.E., Reynolds, J.F., and Strain, B.R.. Fri . "Interactive effects of carbon dioxide and nitrogen supply on above-and belowground chemical composition of loblolly pine (Pinus taeda L.) seedlings". United States. doi:.
@article{osti_107099,
title = {Interactive effects of carbon dioxide and nitrogen supply on above-and belowground chemical composition of loblolly pine (Pinus taeda L.) seedlings},
author = {Gebauer, R.L.E. and Reynolds, J.F. and Strain, B.R.},
abstractNote = {Changes in the whole plant carbon/nitrogen balance of loblolly pine grown at ambient and elevated CO{sub 2}-levels (35 and 70 Pa) and four N levels (0.5, 1.5, 3.5 and 6.5 mM NH{sub 4}NO{sub 3}) were determined by measuring concentrations of total proteins, free amino acids, carbohydrates, and phenolic compounds. Free amino acids and protein concentrations increased with N availability in needles and lateral roots, but were unchanged in stems and tap roots. Under elevated CO{sub 2} starch content was increased in needles but not in roots or stems. Changes in phenolic content in response to elevated CO{sub 2} or N availability generally followed the pattern of soluble sugar concentrations. Phenolic content was in primary needles>lateral roots>tap roots>fascicular needles>stems and decreased with increasing N availability (at>1.5 mM NH{sub 4}NO{sub 3}). Phenolic content was significantly increased at 70 Pa CO{sub 2} only in needles and stems, but not in roots.},
doi = {},
journal = {Bulletin of the Ecological Society of America},
number = 3,
volume = 76,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 1995},
month = {Fri Sep 01 00:00:00 EDT 1995}
}