Effects of spine-shading on aspects of photosynthesis for three cactus species

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AudienciaPúblico en generales_ES
CoberturaMéxicoes_ES
Fecha de ingreso2026-10-05T16:32:56Z
Fecha de publicación2016-01-01
ResumenWe evaluated the effect of spine removal on three cactus species varying in spine-shading of stems. Turbinicarpus schmiedickeanus showed the greater spine shading (c. 61 \%), followed by Mammillaria zephyranthoides (43 \%), and Echinocactus platyacanthus (17 \%). We evaluated photosynthetic activity {[}titratable acidity, electron transport rate, potential quantum yield of Photosystem II, effective quantum yield of Photosystem II, and non-photochemical quenching], as well as pigment content (chlorophylls a and b, total chlorophyll, chlorophyll a/b, carotenoids, and total chlorophyll/carotenoids ratio). For T. schmiedickeanus, the species having the higher spine shading, spine removal increased the CAM activity (acidity level) and the effective quantum yield of Photosystem II and diminished both electron transport rate and non-photochemical quenching at 15:00 hours. For M. zephyranthoides, the species having intermediate spine shading, spine removal also increased the acidity level but diminished effective quantum yield of Photosystem II at midday, as well as chlorophyll a, total chlorophyll, and carotenoids, although there was higher non-photochemical quenching (heat quenching) as an adaptation to avoid photosynthetic damage. Spine removal did not affect acidity level or pigment content from E. platyacanthus, the species having the lower spine shading; however, at midday this species without spines showed a decrease of effective quantum yield of Photosystem II, as well as an increase of non-photochemical quenching and electron transport rate. We suggest that a main function of cactus spines is reduction of sun exposure to avoid damage to the photosynthetic apparatus.es_ES
Doihttps://doi.org/10.17129/botsci.458es_ES
URIhttps://riuat.uat.edu.mx/handle/123456789/4775
Idiomaenes_ES
EditorialSOC BOTANICA MEXICOes_ES
RelaciónBotanical Scienceses_ES
URL relacionadohttps://doi.org/10.17129/botsci.458es_ES
DerechosAcceso abierto (Metadatos de producción científica)es_ES
Licenciahttp://purl.org/coar/access_right/c_abf2es_ES
FuenteBotanical Sciences
Palabra claveCactaceaees_ES
Palabra claveCAM activityes_ES
Palabra claveplant ecophysiologyes_ES
Palabra clavespine removales_ES
TítuloEffects of spine-shading on aspects of photosynthesis for three cactus specieses_ES
TipoArtículoes_ES
ArbitradoHa sido Arbitradoes_ES
Autorde la Rosa-Manzan, Edilia
AutorFlores, Joel
AutorDelgado-Sanchez, Pablo
Autorde la Rosa-Manzan, Ediliaes_ES
AutorFlores, Joeles_ES
AutorDelgado-Sanchez, Pabloes_ES
InstituciónUniversidad Autónoma de Tamaulipas
InstituciónUniversidad Autónoma de Tamaulipases_ES
Número2es_ES
Rango de páginas301-310es_ES
URL relacionadahttps://doi.org/10.17129/botsci.458
Tipo de artículoIndexado
Tipo de artículoIndexadoes_ES
Volumen94es_ES

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