Influence of solar UV radiation on the nitrogen metabolism in needles of Scots pine (Pinus sylvestris L.)

被引：14
|
作者：
Krywult, Marek [2 ]
Smykla, Jerzy [3 ]
Kinnunen, Heli [4 ]
Martz, Francoise [4 ]
Sutinen, Marja-Liisa [4 ,5 ]
Lakkala, Kaisa [6 ]
Turunen, Minna [1 ]
机构：
[1] Univ Lapland, Arctic Ctr, FI-96101 Rovaniemi, Finland
[2] State Sanit Inspect, Prov Sanit Epidemiol Stn, Dept Instrumental Anal, PL-31202 Krakow, Poland
[3] Polish Acad Sci, Inst Nat Conservat, Dept Biodivers, PL-31120 Krakow, Poland
[4] Rovaniemi Res Unit, Finnish Forest Res Inst, FI-96301 Rovaniemi, Finland
[5] Univ Oulu, Dept Biol, FI-90014 Oulu, Finland
[6] FMI ARC, FI-99600 Sodankyla, Finland
来源：
ENVIRONMENTAL POLLUTION | 2008年 / 156卷 / 03期
基金：
芬兰科学院;
关键词：
Nitrate reductase; Nitrogen metabolism; Amino acid; Pinus sylvestris; Subarctic; UV radiation; Temperature;
D O I：
10.1016/j.envpol.2008.04.009
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Needles of 20-year-old Scots pine (Pinus sylvestris L.) saplings were studied in an ultraviolet (UV) exclusion field experiment (from 2000 to 2002) in northern Finland (67 degrees N). The chambers held filters that excluded both UV-B and UV-A, excluded UV-B only, transmitted all UV (control), or lacked filters (ambient). UV-B/UV-A exclusion decreased nitrate reductase (NR) activity of 1-year-old needles of Scots pines compared to the controls. The proportion of free amino acids varied in the range 1.08-1.94% of total proteins, and was significantly higher in needles of saplings grown under UV-B/UV-A exclusion compared to the controls or UV-B exclusion. NR activity correlated with air temperature, indicating a "chamber effect". The study showed that both UV irradiance and increasing temperature are significant modulators of nitrogen (N) metabolism in Scots pine needles. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1105 / 1111
页数：7
相关论文
共 50 条
12345