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Title: Ecophysiology of the pitayo de Queretaro (Stenocereus queretaroensis)
Author: Pimienta-Barrios, E.
Gonzalez Del Castillo-Aranda, M.E.
Nobel, P.S.
Issue Date: 2002
Abstract: The effects of reduced annual rainfall over a 7-year period on the daily patterns of gas exchange were analyzed for a wild platyopuntia (Opuntia robusta) growing in rocky soil. In spite of the prolonged water stress, stomata opened at night and net carbon gain was observed for eight 1-day sampling periods during 2000. Daily net CO2 uptake increased more than five-fold from the end of the dry spring season to the middle of the summer wet season. Curtailment in the formation of both new cladodes and new roots is considered to be an avoidance strategy to water scarcity, which in combination with net CO2 uptake responses to temperature and relative humidity at night, and perhaps association with arbuscular-mycorrhizal fungi, were the most important adaptations for O. robusta to the prolonged drought conditions that prevailed in its rocky environment. Such adaptations of O. robusta are in addition to the classical physiological and structural modifications of CAM plants to tolerate prolonged drought. " Elsevier Science B.V. All rights reserved.",,,,,,"10.1016/S0098-8472(01)00114-9",,,"","",,,,,,"1",,"Environmental and Experimental Botany",,"77
WOS",,,,,,"CO2 uptake; Drought; Opuntia robusta; Rocky soil",,,,,,"Ecophysiology of a wild platyopuntia exposed to prolonged drought",,"Article" "42644","123456789/35008",,"Pimienta-Barrios, E., Ctro. Univ. Cie. Biol. Y A., Universidad de Guadalajara, Km. 15.5 Carretera Nogales, Las Agujas, Zapopan, Jalisco, Mexico, Cer. Maes. 1098, Res. Guadalupe Jar., 45030, Zapopan, Jalisco, Mexico; Pimienta-Barrios, E., Ctro. Univ. Cie. Biol. Y A., Universidad de Guadalajara, Km. 15.5 Carretera Nogales, Las Agujas, Zapopan, Jalisco, Mexico; Nobel, P.S., Dept. Organismic Biol., Ecol., Evol., University of California, Los Angeles, CA 90095-1606, United States",,"Pimienta-Barrios, E.
Pimienta-Barrios, E.
Nobel, P.S.",,"2004",,"Pitayos (Stenocereus spp.) are columnar cacti native to subtropical regions of Mexico that produce edible fruits. Vegetative and reproductive growth for S. qureretaroensis occurs in the dry season but not simultaneously. Most daily net CO2 uptake by S. queretaroensis occurs at night, with the highest values during the late autumn and early winter dry season. Its fine roots are colonized by arbuscular mycorrhizal fungi that enhance stem and fruit growth, apparently due to better P nutrition. The seeds are small, and germinate in response to light. The fruits of S. queretaroensis are valuable resources to wild animals, and can help sequester atmospheric carbon during the dry season. " Elsevier Ltd. All rights reserved.
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