Home > Research > Publications & Outputs > Drought and air pollution affect nitrogen cycli...
View graph of relations

Drought and air pollution affect nitrogen cycling and free radical scavenging in Pinus halepensis (Mill.).

Research output: Contribution to Journal/MagazineJournal article

Published

Standard

Drought and air pollution affect nitrogen cycling and free radical scavenging in Pinus halepensis (Mill.). / Wellburn, Florence A. M.; Lau, Ka-Keung; Milling, Penny M. K. et al.
In: Journal of Experimental Botany, Vol. 47, No. 9, 1996, p. 1361-1367.

Research output: Contribution to Journal/MagazineJournal article

Harvard

Wellburn, FAM, Lau, K-K, Milling, PMK & Wellburn, AR 1996, 'Drought and air pollution affect nitrogen cycling and free radical scavenging in Pinus halepensis (Mill.).', Journal of Experimental Botany, vol. 47, no. 9, pp. 1361-1367. https://doi.org/10.1093/jxb/47.9.1361

APA

Wellburn, F. A. M., Lau, K-K., Milling, P. M. K., & Wellburn, A. R. (1996). Drought and air pollution affect nitrogen cycling and free radical scavenging in Pinus halepensis (Mill.). Journal of Experimental Botany, 47(9), 1361-1367. https://doi.org/10.1093/jxb/47.9.1361

Vancouver

Wellburn FAM, Lau K-K, Milling PMK, Wellburn AR. Drought and air pollution affect nitrogen cycling and free radical scavenging in Pinus halepensis (Mill.). Journal of Experimental Botany. 1996;47(9):1361-1367. doi: 10.1093/jxb/47.9.1361

Author

Wellburn, Florence A. M. ; Lau, Ka-Keung ; Milling, Penny M. K. et al. / Drought and air pollution affect nitrogen cycling and free radical scavenging in Pinus halepensis (Mill.). In: Journal of Experimental Botany. 1996 ; Vol. 47, No. 9. pp. 1361-1367.

Bibtex

@article{27af4310664f45ac87fd0ab3cbe77b91,
title = "Drought and air pollution affect nitrogen cycling and free radical scavenging in Pinus halepensis (Mill.).",
abstract = "Fumigation of Aleppo pines with episodes of O3 (up to 110 nl l–) causes immediate depressions of in vivo nitrate reductase (NaR) activities, slightly delayed reductions in the rates of ethene emissions (typical of O3 plants), steady accumulations of total polyamines (although putrescine declines), and increases in pool sizes of reduced glutathione (GSH) and ascorbate in current year needles. Severe droughting produces smaller plants with reduced stomatal conductance and CO2 assimilation rates as well as lower protein contents. Their roots have low rates of nitrate uptake but virtually no root NaR activities, while levels of shoot activities and NaR-associated proteins are unaffected although they have no substrate. Less severe droughting allows a restricted uptake of nitrate which is still reflected in reduced NaR activities, protein and total N contents, but the additional presence of O3 (up to 120 nl l–1) has no interactive effect on N cycling. Drought and O3 together, however, depress CO2 assimilation still further, which can not be accounted for by additional stomatal closure, but the interactive effects of drought and air pollution reduce levels of total phenols, GSH and ascorbate which, combined with a 12-fold reduction in glutathione reductase-(GR)-associated proteins, point to an increased susceptibility of Aleppo pines to photoinhibition as a reason for their current decline in Mediterranean areas.",
keywords = "Aleppo pine, ascorbate, ELISA, ethene, glutathione reductase, nitrate reductase",
author = "Wellburn, {Florence A. M.} and Ka-Keung Lau and Milling, {Penny M. K.} and Wellburn, {A. R.}",
year = "1996",
doi = "10.1093/jxb/47.9.1361",
language = "English",
volume = "47",
pages = "1361--1367",
journal = "Journal of Experimental Botany",
issn = "1460-2431",
publisher = "OXFORD UNIV PRESS",
number = "9",

}

RIS

TY - JOUR

T1 - Drought and air pollution affect nitrogen cycling and free radical scavenging in Pinus halepensis (Mill.).

AU - Wellburn, Florence A. M.

AU - Lau, Ka-Keung

AU - Milling, Penny M. K.

AU - Wellburn, A. R.

PY - 1996

Y1 - 1996

N2 - Fumigation of Aleppo pines with episodes of O3 (up to 110 nl l–) causes immediate depressions of in vivo nitrate reductase (NaR) activities, slightly delayed reductions in the rates of ethene emissions (typical of O3 plants), steady accumulations of total polyamines (although putrescine declines), and increases in pool sizes of reduced glutathione (GSH) and ascorbate in current year needles. Severe droughting produces smaller plants with reduced stomatal conductance and CO2 assimilation rates as well as lower protein contents. Their roots have low rates of nitrate uptake but virtually no root NaR activities, while levels of shoot activities and NaR-associated proteins are unaffected although they have no substrate. Less severe droughting allows a restricted uptake of nitrate which is still reflected in reduced NaR activities, protein and total N contents, but the additional presence of O3 (up to 120 nl l–1) has no interactive effect on N cycling. Drought and O3 together, however, depress CO2 assimilation still further, which can not be accounted for by additional stomatal closure, but the interactive effects of drought and air pollution reduce levels of total phenols, GSH and ascorbate which, combined with a 12-fold reduction in glutathione reductase-(GR)-associated proteins, point to an increased susceptibility of Aleppo pines to photoinhibition as a reason for their current decline in Mediterranean areas.

AB - Fumigation of Aleppo pines with episodes of O3 (up to 110 nl l–) causes immediate depressions of in vivo nitrate reductase (NaR) activities, slightly delayed reductions in the rates of ethene emissions (typical of O3 plants), steady accumulations of total polyamines (although putrescine declines), and increases in pool sizes of reduced glutathione (GSH) and ascorbate in current year needles. Severe droughting produces smaller plants with reduced stomatal conductance and CO2 assimilation rates as well as lower protein contents. Their roots have low rates of nitrate uptake but virtually no root NaR activities, while levels of shoot activities and NaR-associated proteins are unaffected although they have no substrate. Less severe droughting allows a restricted uptake of nitrate which is still reflected in reduced NaR activities, protein and total N contents, but the additional presence of O3 (up to 120 nl l–1) has no interactive effect on N cycling. Drought and O3 together, however, depress CO2 assimilation still further, which can not be accounted for by additional stomatal closure, but the interactive effects of drought and air pollution reduce levels of total phenols, GSH and ascorbate which, combined with a 12-fold reduction in glutathione reductase-(GR)-associated proteins, point to an increased susceptibility of Aleppo pines to photoinhibition as a reason for their current decline in Mediterranean areas.

KW - Aleppo pine

KW - ascorbate

KW - ELISA

KW - ethene

KW - glutathione reductase

KW - nitrate reductase

U2 - 10.1093/jxb/47.9.1361

DO - 10.1093/jxb/47.9.1361

M3 - Journal article

VL - 47

SP - 1361

EP - 1367

JO - Journal of Experimental Botany

JF - Journal of Experimental Botany

SN - 1460-2431

IS - 9

ER -