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Ecophysiological and anatomical mechanisms behind the nurse effect: which are more important? A multivariate approach for cactus seedlings

dc.contributor.authorDelgado Sánchez, Pablo
dc.contributor.authorYáñez Espinosa, Laura
dc.contributor.authorJiménez Bremont, Juan Francisco
dc.contributor.authorChapa Vargas, Leonardo
dc.contributor.authorFlores Rivas, Joel David
dc.contributor.editorPublic Library of Science
dc.date.accessioned2018-03-23T19:25:58Z
dc.date.available2018-03-23T19:25:58Z
dc.date.issued2013-11
dc.identifier.citationDelgado-Sánchez P, Yáñez-Espinosa L, Jiménez-Bremont JF, Chapa-Vargas L, Flores J (2013) Ecophysiological and Anatomical Mechanisms behind the Nurse Effect: Which Are More Important? A Multivariate Approach for Cactus Seedlings. PLoS ONE 8(11): e81513. https://doi.org/10.1371/journal.pone.0081513
dc.identifier.urihttp://hdl.handle.net/11627/3638
dc.description.abstract"Background: Cacti establish mostly occurs under the canopy of nurse plants which provide a less stressful micro-environment, although mechanisms underlying this process are unknown. The impact of the combination of light and watering treatments on Opuntia streptacantha (Cactaceae) seedlings was examined. Methods/Principal Findings: Ecophysiological [titratable acidity, osmotic potential ('solute potential', psi(s)), relative growth rate (RGR) and their components (NAR, SLA, and LWR)], anatomical (chloroplast density, chloroplast frequency, and cell area), and environmental [photosynthetic photon flux density (PPFD) and air temperature] sets of variables were analyzed, assessing relationships between them and measuring the intensity of the relationships. Three harvests were carried out at days 15, 30, and 45. psi(s) and acidity content were the most important responses for seedling establishment. The main anatomical and environmental variables were chloroplast density and water availability, respectively. Opuntia streptacantha seedlings establish better in the shade-watering treatment, due to higher psi(s) and acidity, unaffected chloroplasts, and lower PPFD. In addition, the chloroplasts of cells under high-light and non-watering treatment were clumped closer to the center of the cytosol than those under shade-drought, to avoid photoinhibition and/or to better distribute or utilize the penetrating light in the green plant tissue. Conclusions: Opuntia seedlings grow better under the shade, although they can tolerate drought in open spaces by increasing and moving chloroplasts and avoiding drastic decreases in their psi(s). This tolerance could have important implications for predicting the impact of climate change on natural desert regeneration, as well as for planning reforestation-afforestation practices, and rural land uses."
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.classificationOTRAS ESPECIALIDADES TECNOLÓGICAS
dc.titleEcophysiological and anatomical mechanisms behind the nurse effect: which are more important? A multivariate approach for cactus seedlings
dc.typearticle
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0081513
dc.rights.accessAcceso Abierto


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