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Absorption of nitrogen dioxide by barley in open‐top chambers
Author(s) -
JENSEN E. S.,
PILEGAARD K.
Publication year - 1993
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1993.tb03746.x
Subject(s) - nitrogen , absorption (acoustics) , hordeum vulgare , nitrogen dioxide , chemistry , dilution , fumigation , agronomy , botany , biology , poaceae , materials science , physics , organic chemistry , composite material , thermodynamics
SUMMARY Foliar absorption of nitrogen dioxide in barley ( Hordeum vulgare L.) exposed to mean NO 2 concentrations of 4 and 37 ppb was studied in open‐top chambers. The possible compensation for insufficient supply of nitrogen in the growth medium by increased uptake of NO 2 from the air was investigated by growing plants with sub‐optimal and optimal N supply. The amount of NO, derived from fumigation was estimated using the 15 N dilution technique, in which the nitrogen derived from the growth medium was labelled with 15 N. The absorption of NO 2 ‐N from polluted air contributed 5–6% of the total N. An additional 3–5% was derived from other N sources, probably also of gaseous origin. Thus, total absorption from gaseous sources in the NO 2 ‐fumigated plants was estimated to be approximately 10% of total N. The amount absorbed from aerial sources was proportional to the top weight. The amount of NO 2 absorbed was highest in the plants with optimal N supply. However, in plants grown with sub‐optimal N, there was a relatively higher contribution to total N from the NO 2 ‐N.