High tolerance to high-light conditions for the protected species Ariocarpus kotschoubeyanus (Cactaceae)

dc.creatorERIKA ARROYO PEREZ
dc.creatorJOEL DAVID FLORES RIVAS
dc.creatorCLAUDIA GONZALEZ SALVATIERRA
dc.creatorMARIA LORAINE MATIAS PALAFOX
dc.creatorCECILIA LEONOR JIMÉNEZ SIERRA
dc.date2017-07
dc.date.accessioned2022-10-12T19:55:29Z
dc.date.available2022-10-12T19:55:29Z
dc.identifierhttp://ipicyt.repositorioinstitucional.mx/jspui/handle/1010/1597
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4124971
dc.description"We determined the seasonal ecophysiological performance under perennial plants and under high solar radiation for adult individuals from the ‘living rock’ cactus Ariocarpus kotschoubeyanus, which occurs equally under nurse plants and in open spaces. We evaluated the effective quantum yield of photosystem II (ΦPSII) and the dissipation of thermal energy [non-photochemical quenching (NPQ)] thorough the year. The maximum apparent electron transport rate (ETRmax) and the saturating photosynthetically active photon flux density for PSII (PFDsat) were also determined from rapid light curves. We found that although the ΦPSII was higher in shaded sites under potential nurse plants than in exposed sites, all values were close to the optimal value of 0.83. The high ΦPSII found for A. kotschoubeyanus plants suggests that they use a great proportion of the absorbed light for photosynthesis, under nurse plants as well as in open spaces. We also found higher NPQ values in exposed sites than in shaded ones but only in Autumn, thus reducing the risk of photoinhibition. In addition, the PFDsat was higher in exposed sites than in shaded ones in Spring, Summer and Autumn, but in Winter there were no differences between treatments. We also found high saturating light levels for ETR (PFDsat higher than 1378 μmol m−2 s−1) in all seasons but in winter for shaded and non-shaded plants. Our findings indicate that A. kotschoubeyanus plants use a great proportion of the light that they absorb for photosynthesis. This high tolerance to high-light conditions could explain why A. kotschoubeyanus do not show preferences for protected sites under nurse plants."
dc.formatapplication/pdf
dc.publisherOxford University Press
dc.relationinfo:eu-repo/semantics/altIdentifier/DOI/https://doi.org/10.1093/conphys/cox042
dc.relationcitation:Erika Arroyo-Pérez, Joel Flores, Claudia González-Salvatierra, María L. Matías-Palafox, Cecilia Jiménez-Sierra; High tolerance to high-light conditions for the protected species Ariocarpus kotschoubeyanus (Cactaceae), Conservation Physiology, Volume 5, Issue 1, 1 January 2017, cox042, https://doi.org/10.1093/conphys/cox042
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectinfo:eu-repo/classification/Autor/Chihuahuan desert
dc.subjectinfo:eu-repo/classification/Autor/Chlorophyll fluorescence
dc.subjectinfo:eu-repo/classification/Autor/Endangered species
dc.subjectinfo:eu-repo/classification/Autor/Living rock cactus
dc.subjectinfo:eu-repo/classification/Autor/Nurse plants
dc.subjectinfo:eu-repo/classification/Autor/Stress tolerance
dc.subjectinfo:eu-repo/classification/cti/6
dc.subjectinfo:eu-repo/classification/cti/31
dc.subjectinfo:eu-repo/classification/cti/3103
dc.subjectinfo:eu-repo/classification/cti/241713
dc.titleHigh tolerance to high-light conditions for the protected species Ariocarpus kotschoubeyanus (Cactaceae)
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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