Seasonal water relations in four co-existing native shrub species from Northeastern Mexico
| Autor: | Juan Manuel López-Hernández, Roque Gonzalo Ramírez-Lozano, Israel Cantú-Silva, Wibke Himmelsbach, Jorge Isaac Sarquís-Ramírez, Humberto González-Rodríguez |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Parkinsonia texana biology ved/biology ved/biology.organism_classification_rank.species Celtis ehrenbergiana Soil Science Xylem Acacia biology.organism_classification 010603 evolutionary biology 01 natural sciences Shrub Horticulture Botany Soil water Environmental science Forestiera angustifolia Pressure bomb 010606 plant biology & botany |
| Zdroj: | Arid Land Research and Management. 30:375-388 |
| ISSN: | 1532-4990 1532-4982 |
| Popis: | Seasonal xylem water potentials (Ψ, MPa) and their relationship to soil water content and evaporative demand components were studied in the shrub species Acacia amentacea, Celtis ehrenbergiana, Forestiera angustifolia, and Parkinsonia texana var. macra. Predawn (Ψpd) and midday (Ψmd) water potentials were estimated at 15 days intervals, between January 15 and October 30, 2009 using a Scholander pressure bomb at 06:00 h (predawn) and 14:00 h (midday), respectively. During the humid period, Ψpd ranged from −0.30 MPa (C. ehrenbergiana), to −0.90 MPa (P. texana). In contrast, over the driest period, Ψpd varied between −2.18 (P. texana) and −3.94 MPa (F. angustifolia). At midday, P. texana and F. angustifolia showed the highest (−1.14 MPa) and lowest (−3.38 MPa) Ψ values, respectively. Average soil water content accounted for 35 to 70% of the variation in predawn Ψ. Furthermore, both Ψ reflected the environmental conditions, as indicated by typical correlations observed. The studied shrub species exhib... |
| Databáze: | OpenAIRE |
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