caa a22 4500 469095881 CHVBK 20180323133030.0 cr unu---uuuuu 170328e19921001xx s 000 0 eng 10.1007/BF00317266 doi (NATIONALLICENCE)springer-10.1007/BF00317266 Foliole movement and canopy architecture of Larrea tridentata (DC.) Cov. in Mexican deserts [Elektronische Daten] [Exequiel Ezcurra, Santiago Arizaga, Pedro Valverde, Cristina Mourelle, Arturo Flores-Martínez] Summary: The creosote bush (Larrea tridentata) is a common desert perennial with bifoliate, amphistomatic, divaricate leaves. The leaves can vertically close their folioles and vary their profile with respect to direct solar radiation. Field data from different Mexican deserts showed a significant correlation between foliole aperture and mean foliole inclination: in plants in which folioles were more open, the foliole surfaces were less vertical. In a series of field experiments in the Chihuahuan Desert, foliole aperture varied significantly with the water-status of the plant and the hour of the day. In moist plants, folioles opened in the early morning and closed in the afternoon. Water-stressed plants showed significantly lower foliole apertures. A simulation of the light interception patterns of the plants showed that foliole closure in water-stressed individuals reduces direct radiation interception by around 24%. Most (64%) of the reduction in interception was due to the vertical inclination of the photosynthetic surfaces induced by foliole closure in the water-stressed plants. The rest (36%) of the reduction in interception was due to differential self-shading between foliole pairs, which was higher in the closed folioles of the water-stressed plants, but operated more towards the early hours of the day. Springer-Verlag, 1992 Larrea tridentata nationallicence Mexico nationallicence Deserts nationallicence Canopy architecture nationallicence Foliole movement nationallicence Ezcurra Exequiel Centro de Ecología, Universidad Nacional Autónoma de México, Apartado Postal 70-275, 04510, México, D.F., México aut Arizaga Santiago Centro de Ecología, Universidad Nacional Autónoma de México, Apartado Postal 70-275, 04510, México, D.F., México aut Valverde Pedro Departmento de Biología, División CBS, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55-535, 09340, México, D.F., México aut Mourelle Cristina Centro de Ecología, Universidad Nacional Autónoma de México, Apartado Postal 70-275, 04510, México, D.F., México aut Flores-Martínez Arturo Centro de Ecología, Universidad Nacional Autónoma de México, Apartado Postal 70-275, 04510, México, D.F., México aut Oecologia Springer-Verlag 92/1(1992-10-01), 83-89 0029-8549 92:1<83 1992 92 442 https://doi.org/10.1007/BF00317266 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317266 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ezcurra Exequiel Centro de Ecología, Universidad Nacional Autónoma de México, Apartado Postal 70-275, 04510, México, D.F., México aut NATIONALLICENCE 700 1- Arizaga Santiago Centro de Ecología, Universidad Nacional Autónoma de México, Apartado Postal 70-275, 04510, México, D.F., México aut NATIONALLICENCE 700 1- Valverde Pedro Departmento de Biología, División CBS, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55-535, 09340, México, D.F., México aut NATIONALLICENCE 700 1- Mourelle Cristina Centro de Ecología, Universidad Nacional Autónoma de México, Apartado Postal 70-275, 04510, México, D.F., México aut NATIONALLICENCE 700 1- Flores-Martínez Arturo Centro de Ecología, Universidad Nacional Autónoma de México, Apartado Postal 70-275, 04510, México, D.F., México aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 92/1(1992-10-01), 83-89 0029-8549 92:1<83 1992 92 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer