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

dc.contributor.authorArroyo Pérez, Erika
dc.contributor.authorFlores Rivas, Joel David
dc.contributor.authorGonzález Salvatierra, Claudia
dc.contributor.authorMatias Palafox, María Loraine
dc.contributor.authorJiménez Sierra, Cecilia Leonor
dc.contributor.authorArroyo Pérez, Erika
dc.contributor.editorOxford University Press
dc.date.accessioned2018-07-11T18:29:29Z
dc.date.available2018-07-11T18:29:29Z
dc.date.issued2017-07
dc.identifier.citationErika 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.identifier.urihttp://hdl.handle.net/11627/3994
dc.description.abstract"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 (?PSII) 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 ?PSII 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 ?PSII 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 ?mol 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.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectChihuahuan desert
dc.subjectChlorophyll fluorescence
dc.subjectEndangered species
dc.subjectLiving rock cactus
dc.subjectNurse plants
dc.subjectStress tolerance
dc.subject.classificationECOLOGÍA VEGETAL
dc.titleHigh tolerance to high-light conditions for the protected species Ariocarpus kotschoubeyanus (Cactaceae)
dc.typearticle
dc.identifier.doihttps://doi.org/10.1093/conphys/cox042
dc.rights.accessAcceso Abierto


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