Mycorrhizal promotion of host stomatal conductance in relation to irradiance and temperature

被引:33
作者
Augé, RM
Moore, JL
Sylvia, DM
Cho, KH
机构
[1] Univ Tennessee, Dept Plant Sci, Knoxville, TN 37996 USA
[2] Univ Florida, Dept Soil & Water Sci, Gainesville, FL 32611 USA
关键词
arbuscular mycorrhizal symbiosis; Gigaspora margarita; Glomus intraradices; Sorghum bicolor; water relations;
D O I
10.1007/s00572-003-0241-x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Colonization of roots and soil by arbuscular mycorrhizal (AM) fungi sometimes promotes stomatal conductance (g(s)) of the host plant, but scientists have had difficulty predicting or manipulating the response. Our objective was to test whether the magnitude of AM influence on g(s) is related to environmental conditions: irradiance, air temperature or leaf temperature. Stomatal conductances of two groups of uncolonized sorghum plants were compared to g(s) of plants colonized by Glomus intraradices (Gi) or Gigaspora margarita (Gm) in 31 morning and afternoon periods under naturally varying greenhouse conditions. Stomatal conductance of Gi and Gm plants was often markedly higher than g(s) of similarly sized nonAM plants. AM promotion of g(s) was minimal at the lowest irradiances and lowest air and leaf temperatures, but was substantial at intermediate irradiance and temperatures. AM promotion was again low or absent at the highest irradiances and temperatures. Magnitude of AM promotion of g(s) was not a function of absolute g(s). Promotion of gs by Gi and Gm was remarkably similar. Differing phosphorus fertilization did not affect g(s).
引用
收藏
页码:85 / 92
页数:8
相关论文
共 35 条
[21]   REGULATION OF PHOTOSYNTHESIS BY SINK ACTIVITY - THE MISSING LINK [J].
HEROLD, A .
NEW PHYTOLOGIST, 1980, 86 (02) :131-144
[22]   Effects of Mycorrhizae on Sorghum Growth, Photosynthesis, and Stomatal Conductance under Drought Conditions [J].
Ibrahim, M. A. ;
Campbell, W. F. ;
Rupp, L. A. ;
Allen, E. B. .
ARID SOIL RESEARCH AND REHABILITATION, 1990, 4 (02) :99-107
[23]   THE EFFECT OF VA MYCORRHIZAL INFECTION AND PHOSPHORUS STATUS ON SUNFLOWER HYDRAULIC AND STOMATAL PROPERTIES [J].
KOIDE, R .
JOURNAL OF EXPERIMENTAL BOTANY, 1985, 36 (168) :1087-1098
[24]  
Mansfield T. A., 1981, Stomatal physiology., P119
[25]   A NEW METHOD WHICH GIVES AN OBJECTIVE-MEASURE OF COLONIZATION OF ROOTS BY VESICULAR ARBUSCULAR MYCORRHIZAL FUNGI [J].
MCGONIGLE, TP ;
MILLER, MH ;
EVANS, DG ;
FAIRCHILD, GL ;
SWAN, JA .
NEW PHYTOLOGIST, 1990, 115 (03) :495-501
[26]   EXTERNAL HYPHAL PRODUCTION OF VESICULAR-ARBUSCULAR MYCORRHIZAL FUNGI IN PASTURE AND TALLGRASS PRAIRIE COMMUNITIES [J].
MILLER, RM ;
REINHARDT, DR ;
JASTROW, JD .
OECOLOGIA, 1995, 103 (01) :17-23
[27]  
SALISBURY FB, 1985, PLANT PHYSIOL, P60
[28]  
SANCHEZDIAZ M, 1994, ADV LIF SCI, P167
[29]   EFFECT OF WATER-STRESS ON PHOTOSYNTHETIC ACTIVITY IN THE MEDICAGO-RHIZOBIUM-GLOMUS SYMBIOSIS [J].
SANCHEZDIAZ, M ;
PARDO, M ;
ANTOLIN, M ;
PENA, J ;
AGUIRREOLEA, J .
PLANT SCIENCE, 1990, 71 (02) :215-221
[30]  
SHAFER SR, 1994, APS SYMP SER, P153