Effects of NO (+ NO<sub>2</sub>) pollution on growth, nitrate reductase activities and associated protein contents in glasshouse lettuce grown hydroponically in winter with CO<sub>2</sub> enrichment

New Phytologist - Tập 133 Số 3 - Trang 495-501 - 1996
CAROLINE A. HUFTON1,2, R. T. Besford3, A. R. Wellburn2
1Current Address: Horticulture Research International, stockbridge House, Cawood, Selby YO8 0TZ.
2Division of Biological Sciences, Institute of Environmental and Biological Sciences, Lancaster University, Lancaster, LAI 4YQ, UK
3Horticulture Research International, Worthing Road, Littlehampton BN17 6LP, UK

Tóm tắt

summaryWinter hydroponic growth of several lettuce cultivars under glass showed considerable inhibition (up to 47%) of growth after 6 wk exposure to concentrations of NO (+ NO2 450 nl −1 in total) typical of emissions from propane burners used for direct heating and CO2 enrichment. After a further 4 wk under similar conditions, however, these growth depressions were replaced by a swing into benefit so that, by harvest, pollutant‐exposed lettuces were bigger and had faster assimilation rates than those growing in clean CO2‐enriched air. This adaptation may partly be explained by enhanced use of NO2‐derived N by lettuce leaves, a consequence of increased nitrate reductase (NaR) activities and amounts of associated NaR proteins, despite adequate nitrate also being available in the hydroponic fluid. Rates of NaR activity in the roots, by contrast, were depressed by NO (+ NO2) pollution. NaR activities were highest in early afternoon in clean or polluted air but these daily patterns did not coincide with the content of NaR‐associated proteins determined by ELISA. Other mechanisms of modulating NaR activity must therefore be responsible.

Từ khóa


Tài liệu tham khảo

10.1007/BF01160710

10.1111/j.1469-8137.1991.tb01029.x

10.1093/jxb/40.3.329

10.1104/pp.95.1.281

10.1111/j.1469-8137.1994.tb07528.x

10.1007/BF00194005

10.1104/pp.88.2.383

10.1146/annurev.pp.32.060181.001125

Hand DW, 1982, CO2 enrichment, the benefits and problems, Scientific Horticulture, 33, 14

10.1016/0003-9861(92)90544-7

10.1007/BF00196253

10.1016/B978-0-408-10705-1.50010-7

10.1016/0168-9452(91)90022-Z

10.1007/BF02464902

10.1016/0143-1471(85)90112-6

10.1104/pp.88.2.242

10.1104/pp.80.2.442

10.1098/rstb.1984.0059

10.1111/j.1469-8137.1987.tb00188.x

10.1104/pp.63.6.1098

10.1016/0269-7491(94)90049-3

10.1016/S0176-1617(11)81167-3

10.1111/j.1469-8137.1991.tb00962.x

UK‐TERG (United Kingdom Terrestrial Effects Review Group), 1988, Department of the Environment, 35

10.1111/j.1469-8137.1990.tb00467.x

10.1016/0143-1471(80)90016-1

10.1016/0143-1471(83)90078-8

WHO (World Health Organization), 1987, Air quality guidelines for Europe, 297

10.1016/0013-9327(76)90022-7

Thông tin
Thông tin xuất bản

New Phytologist

Tập 133 Số 3

495-501

Thông tin tác giả