Record Display for the EPA National Library Catalog

RECORD NUMBER: 33 OF 105

OLS Field Name OLS Field Data
Main Title Effects of Summer Drought on the Water Relations, Physiology and Growth of Large and Small Plants of 'Prosopis glandulosa' and 'Larrea tridentata'.
Author de Soyza, A. G. ; Whitford, W. G. ; Virginia, R. A. ; Reynolds, J. F. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. National Exposure Research Lab. ;New Mexico State Univ., Las Cruces. Jornada Experimental Range. ;Dartmouth Coll., Hanover, NH. Environmental Studies Program. ;Duke Univ., Durham, NC. Dept. of Botany.
Publisher Jul 95
Year Published 1995
Report Number EPA/600/A-95/137;
Stock Number PB96-117551
Additional Subjects Drought tolerance ; Physiological ecology ; Shrubs ; Meetings ; Plants(Biology) ; Water utilization ; Plant physiology ; Environmental effects ; Photosynthesis ; Plant growth ; Climatic changes ; Creosote bush ; Mesquite ; Ecological monitoring ; Prosopis glandulosa ; Larrea tridentata
Holdings
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NTIS  PB96-117551 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 02/29/1996
Collation 21p
Abstract
Large and small plants of creosotebush and mesquite were subjected to drought during summer 1993. Large and small plants responded to drought with lowered xylem water potential and lowered photosynthetic gas exchange. Large plants appear to maintain a reduced but constant photosynthetic rate during drought and responded to precipitation with increased photosynthesis. However, small plants attempted to maintain a high photosynthetic rate throughout the season, responding less strongly to precipitation events, but probably depleting reserves more and causing photosynthesis to decline more when droughted. Our results suggest that larged, established plants are better able to withstand drought than are small, establishing shrubs.