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EFFECTS OF SUMMER DROUGHT ON THE WATER RELATIONS, PHYSIOLOGY AND GROWTH OF LARGE AND SMALL PLANTS OF PROSOPIS GLANDULOSA AND LARREA TRIDENTATA
Citation:
Soyza, A., W. Whitford, R. Virginia, AND J. Reynolds. EFFECTS OF SUMMER DROUGHT ON THE WATER RELATIONS, PHYSIOLOGY AND GROWTH OF LARGE AND SMALL PLANTS OF PROSOPIS GLANDULOSA AND LARREA TRIDENTATA. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-95/137 (NTIS PB96117551), 1995.
Description:
Large and small plants of creosotebush and mesquite were subjected to drought during summer 1993. arge and small plants responded to drought with lowered xylem water potential and lowered photosynthetic gas exchange. arge plants appear to maintain a reduced but constant photosynthetic rate during drought and responded to precipitation with increased photosynthesis. owever, 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. ur results suggest that large, established plants are better able to withstand drought than are small, establishing shrubs.
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EFFECTS OF SUMMER DROUGHT ON THE WATER RELATIONS, PHYSIOLOGY AND GROWTH OF LARGE AND SMALL PLANTS OF PROSOPIS GLANDULOSA AND LARREA TRIDENTATA