| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
USDA-ARS, Agronomy Physiology Lab., Univ. of Florida, Gainesville, FL 32611-0840
* Corresponding author (aksch{at}gnv.ifas.ufl.edu).
In studying differences among genotypes in physiological response to drying soil, it is important that the genotypes be compared at equivalent soil water contents. Unless the comparisons are made at the same soil water content, genotypic difference may only he a consequence of differences in soil water status. In this study, the objective was to compare stomatal closure among eight maize (Zea mays L.) hybrids in response to soil drying. Three greenhouse experiments were conducted in which daily transpiration and soil water content were measured by weighing each pot. Daily transpiration of stressed plants was normalized relative to that of control plants to minimize variation due to environmental effects. This daily transpiration ratio also was normalized relative to the well-watered condition to minimize variation among plants and was recorded as normalized transpiration ratio (NTR). Daily soil water content was expressed as the fraction of transpirable soil water (FTSW). Among the eight hybrids examined, there were statistical differences in the FTSW at which the stomata began to close. In all experiments, Hybrid 3165 was consistently among the hybrids that began to close their stomata at small FTSW values; whereas, Hybrid 3737 began to close its stomata at large FTSW values. While we surveyed a small genetic base, our results indicated genotypic differences exist for stomatal responses to a drying soil.
Received for publication April 19, 1996.
This article has been cited by other articles:
|
|
 |
|
  E. V. Hufstetler, H. R. Boerma, T. E. Carter Jr., and H. J. Earl Genotypic Variation for Three Physiological Traits Affecting Drought Tolerance in Soybean Crop Sci., January 22, 2007; 47(1): 25 - 35. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 C. A. King and L. C. Purcell Inhibition of N2 Fixation in Soybean Is Associated with Elevated Ureides and Amino Acids Plant Physiology, April 1, 2005; 137(4): 1389 - 1396. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M. Bindi, S. Bellesi, S. Orlandini, L. Fibbi, M. Moriondo, and T. Sinclair Influence of Water Deficit Stress on Leaf Area Development and Transpiration of Sangiovese Grapevines Grown in Pots Am. J. Enol. Vitic., March 1, 2005; 56(1): 68 - 72. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. J. Earl A PRECISE GRAVIMETRIC METHOD FOR SIMULATING DROUGHT STRESS IN POT EXPERIMENTS Crop Sci., September 1, 2003; 43(5): 1868 - 1873. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 T. R. Sinclair and R. C. Muchow System Analysis of Plant Traits to Increase Grain Yield on Limited Water Supplies Agron. J., March 1, 2001; 93(2): 263 - 270. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C.A. King, L. C. Purcell, and E. D. Vories Plant Growth and Nitrogenase Activity of Glyphosate-Tolerant Soybean in Response to Foliar Glyphosate Applications Agron. J., January 1, 2001; 93(1): 179 - 186. [Abstract] [Full Text]
|
|
|
|
 |
|
 V. Vadez and T. R. Sinclair Leaf ureide degradation and N2 fixation tolerance to water deficit in soybean J. Exp. Bot., January 1, 2001; 52(354): 153 - 159. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. Cárcova, G. A. Maddonni, and C. M. Ghersa Long-Term Cropping Effects on Maize: Crop Evapotranspiration and Grain Yield Agron. J., November 1, 2000; 92(6): 1256 - 1265. [Abstract] [Full Text]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Vadose Zone Journal | |||
| Journal of Natural Resources and Life Sciences Education |
Soil Science Society of America Journal | ||||
| Journal of Plant Registrations | Journal of Environmental Quality |
The Plant Genome | |||
