PHOTOSYNTHETIC AND STOMATAL CONDUCTANCE RESPONSES TO ACID MIST OF RED SPRUCE SEEDLINGS

被引:44
作者
EAMUS, D [1 ]
FOWLER, D [1 ]
机构
[1] INST TERR ECOL, PENICUIK EH26 0QB, MIDLOTHIAN, SCOTLAND
关键词
acid mist; photosynthesis; stomata;
D O I
10.1111/j.1365-3040.1990.tb02138.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Abstract Two‐year‐old seedlings of Picea rubens, growing in open‐top chambers in Scotland were treated twice weekly from July 1987 to December 1987, with mist containing ammonium sulphate and nitric acid at a pH of either 2.5 or 5.0. The response of photosynthesis and stomatal conductance to light flux density and carbon dioxide concentration were measured in March 1989. Leaf chlorophyll a and b contents were also measured. Acid mist (pH 2.5) resulted in several significant changes. First, both the rate of light saturated photosynthesis (Amax) and CO2‐ saturated rate of photosynthesis (J) were substantially increased, when expressed per unit leaf area. Second, the apparent quantum yield and chlorophylls a and b content increased. Third, as a consequence of the greater chlorophyll content of the leaves treated with acid mist, the rate of Amax, and J, expressed per unit chlorophyll, was substantially reduced in pH 2.5 treated branches. Stomatal conductance was enhanced at all but the highest light flux densities, and was independent of the CO2 concentration, remaining high for all values of CO2 concentration used. These results show that acid mist caused a number of responses in the gas exchange and photosynthetic properties of red spruce. Copyright © 1990, Wiley Blackwell. All rights reserved
引用
收藏
页码:349 / 357
页数:9
相关论文
共 55 条
[1]  
[Anonymous], NATO C SERIES
[2]   PHOTOSYNTHESIS AS RELATED TO XYLEM WATER POTENTIAL AND CARBON-DIOXIDE CONCENTRATION IN SITKA SPRUCE [J].
BEADLE, CL ;
NEILSON, RE ;
JARVIS, PG ;
TALBOT, H .
PHYSIOLOGIA PLANTARUM, 1981, 52 (04) :391-400
[3]   A NEW TYPE OF FOREST DECLINE IN GERMANY [J].
BLANK, LW .
NATURE, 1985, 314 (6009) :311-314
[5]  
Burrows F. J., 1976, Water deficits and plant growth. Volume 4. Soil water measurement, plant responses, and breeding for drought resistance. [Kozlowski, T.T. (Editor)]., P103
[6]   GROWTH AND PHYSIOLOGICAL-RESPONSES OF YELLOW-POPLAR SEEDLINGS EXPOSED TO OZONE AND SIMULATED ACIDIC RAIN [J].
CHAPPELKA, AH ;
CHEVONE, BI ;
SEILER, JR .
ENVIRONMENTAL POLLUTION, 1988, 49 (01) :1-18
[7]  
Coombs J, 1985, TECHNIQUES BIOPRODUC, P219
[8]   THE EFFECT OF FREEZING NIGHTS ON PHOTOSYNTHESIS, STOMATAL CONDUCTANCE, AND INTERNAL CO2 CONCENTRATION IN SEEDLINGS OF ENGELMANN SPRUCE (PICEA-ENGELMANNII PARRY) [J].
DELUCIA, EH .
PLANT CELL AND ENVIRONMENT, 1987, 10 (04) :333-338
[9]   PRECHILLING OF XANTHIUM-STRUMARIUM L REDUCES NET PHOTOSYNTHESIS AND, INDEPENDENTLY, STOMATAL CONDUCTANCE, WHILE SENSITIZING STOMATA TO CO2 [J].
DRAKE, B ;
RASCHKE, K .
PLANT PHYSIOLOGY, 1974, 53 (06) :808-812
[10]   EFFECT OF ABSCISIC-ACID ON GAIN OF FEEDBACK LOOP INVOLVING CARBON-DIOXIDE AND STOMATA [J].
DUBBE, DR ;
FARQUHAR, GD ;
RASCHKE, K .
PLANT PHYSIOLOGY, 1978, 62 (03) :413-417