Potential growth and drought tolerance of eight desert grasses: lack of a trade-off?

TitlePotential growth and drought tolerance of eight desert grasses: lack of a trade-off?
Publication TypeJournal Article
Year of Publication2000
AuthorsFernández RJ, Reynolds JF
Date Published2000
Accession NumberJRN00310
Call Number00731
Keywordsarticle, articles, C-4, drought tolerance, grass, grass, drought tolerance, journal, journals, photosynthetic pathway, plant, Aristida purpurea, plant, Bouteloua eriopoda, plant, Eragrostis lehmanniana, plant, Hilaria mutica, plant, Muhlenbergia porteri, plant, Panicum obtusum, plant, Scleropogon brevifolius, plant, Sporobolus flexuosus, water stress, xerophytism

Eight perennial C-4 grasses from the Jornada del Muerto Basin show 5-fold differences in relative growth rates under well-watered conditions (RGRmax). In a controled environment, the hypothesis was tested that there is an inverse relationship (trade-off) between RgRmax and the capacity of these species to tolerate drought. Based on these controlled-environment results, it is hypothesized that the commonly reported correlation between plant growth potential and drought tolerance in the field may in some cases be explained by differential effects of plants on soil-water content rather than by differences in species responses to drought.

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