| Main Title |
Evaluation of a System for the Imposition of Plant Water Stress. |
| Author |
Snow, M. D. ;
Tingey, D. T. ;
|
| CORP Author |
Corvallis Environmental Research Lab., OR. ;Portland Univ., OR. Dept. of Physical and Life Sciences. |
| Year Published |
1985 |
| Report Number |
EPA/600/J-85/216; |
| Stock Number |
PB86-121530 |
| Additional Subjects |
Stress(Physiology) ;
Plants(Physiology) ;
Soil water ;
Experimental data ;
Evaluation ;
Hydraulic conductivity ;
Growth ;
Transpiration ;
Periodic variations ;
Reprints ;
Sunflowers ;
Water levels
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB86-121530 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
8p |
| Abstract |
A system which imposes a range of water stress levels was developed and evaluated. Water stress was controlled by employing a screen to suspend roots above a water column of known height. Levels of water stress were imposed by changing water column height and/or hydraulic conductivity of the medium in the column. The system was evaluated in a series of growth chamber experiments in which sunflowers(Helianthus annuus) were given three levels of water availability for a period of 3 weeks. Third leaf midday water potentials at the end of the trials ranged from -0.73+ or -0.04 to -2.35+ or -0.17 megapascals in water stressed plants compared to -0.04+ or - 0.02 megapascals for control plants. Repetition of experiments showed no statistical differences in leaf water potentials, plant leaf areas, or plastochron indices between trials. |
