CAM-cycling in the cycad Dioon edule Lindl. in its natural tropical deciduous forest habitat in central Veracruz, Mexico

Vovides, Andrew P.; Etherington, John; Dresser, Paul; Groenhof, Andrew C.; Iglesias, Carlos; Ramirez, Jonathan Flores

doi:10.1046/j.1095-8339.2002.138002155.x

Cited by 26 publications

(28 citation statements)

References 26 publications

(55 reference statements)

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“…A number of epiphytic ferns (pteropsids) have CAM (Keeley & Rundel 2005;table 1j ). The coniferopsid cycadophyte Dioon edule (Vovides et al 2002) and gnetophyte Welwitschia mirabilis have some features of CAM, which could constitute a CCM (Keeley & Rundel 2003).…”

Section: The Range Of Organisms With Ccms (A) Backgroundmentioning

confidence: 99%

The evolution of inorganic carbon concentrating mechanisms in photosynthesis

Raven

Cockell

Rocha

2008

Phil. Trans. R. Soc. B

293

206

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Inorganic carbon concentrating mechanisms (CCMs) catalyse the accumulation of CO 2 around rubisco in all cyanobacteria, most algae and aquatic plants and in C 4 and crassulacean acid metabolism (CAM) vascular plants. CCMs are polyphyletic (more than one evolutionary origin) and involve active transport of HCO K 3 , CO 2 and/or H C , or an energized biochemical mechanism as in C 4 and CAM plants. While the CCM in almost all C 4 plants and many CAM plants is constitutive, many CCMs show acclimatory responses to variations in the supply of not only CO 2 but also photosynthetically active radiation, nitrogen, phosphorus and iron. The evolution of CCMs is generally considered in the context of decreased CO 2 availability, with only a secondary role for increasing O 2 . However, the earliest CCMs may have evolved in oxygenic cyanobacteria before the atmosphere became oxygenated in stromatolites with diffusion barriers around the cells related to UV screening. This would decrease CO 2 availability to cells and increase the O 2 concentration within them, inhibiting rubisco and generating reactive oxygen species, including O 3 .

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Section: The Range Of Organisms With Ccms (A) Backgroundmentioning

confidence: 99%

The evolution of inorganic carbon concentrating mechanisms in photosynthesis

Raven

Cockell

Rocha

2008

Phil. Trans. R. Soc. B

293

206

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“…F. (Welwischiaceae) (von Willert et al 2005), the Cycadales, Dioon edule Lindl. (Zamiaceae) (Vovides et al 2002) and in several epiphytic families of ferns within the Polypodiaceae (Holtum and Winter 1999) and the Vittariaceae (Martin et al 2005).…”

Section: Taxonomic Distribution Of Cammentioning

confidence: 99%

Evolution along the crassulacean acid metabolism continuum

Silvera

Neubig

Whitten

et al. 2010

Functional Plant Biol.

193

199

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Abstract. Crassulacean acid metabolism (CAM) is a specialised mode of photosynthesis that improves atmospheric CO 2 assimilation in water-limited terrestrial and epiphytic habitats and in CO 2 -limited aquatic environments. In contrast with C 3 and C 4 plants, CAM plants take up CO 2 from the atmosphere partially or predominantly at night. CAM is taxonomically widespread among vascular plants and is present in many succulent species that occupy semiarid regions, as well as in tropical epiphytes and in some aquatic macrophytes. This water-conserving photosynthetic pathway has evolved multiple times and is found in close to 6% of vascular plant species from at least 35 families. Although many aspects of CAM molecular biology, biochemistry and ecophysiology are well understood, relatively little is known about the evolutionary origins of CAM. This review focuses on five main topics: (1) the permutations and plasticity of CAM, (2) the requirements for CAM evolution, (3) the drivers of CAM evolution, (4) the prevalence and taxonomic distribution of CAM among vascular plants with emphasis on the Orchidaceae and (5) the molecular underpinnings of CAM evolution including circadian clock regulation of gene expression.

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“…En el caso de algunas especies de Zamiaceae de México se han logrado avances importantes en el conocimiento de su biogeografía Gregory y Chemnick, 2004;Vovides et al, 2004), sistemática (Vovides, 1983;Vovides et al, 1983;Vovides, 1985;Bogler y Francisco-Ortega, 2004;Schutzman, 2004;Nicolalde-Morejón, 2005), ecología (Vovides, 1990;Lázaro-Zermeño, 2002;Sánchez-Ramos et al, 2002;Vovides et al, 2003;Pérez-Farrera y Vovides, 2004;Pérez-Farrera et al, 2006;Lázaro-Zermeño et al, 2011), genética (Pérez-Farrera et al, 2007;Flores-Vázquez, 2008;Cabrera Toledo, 2009;Octavio-Aguilar, 2009), fisiología (Vovides et al, 2002a) y etnobotánica (Pérez-Farrera y Vovides, 2006;Valdez, 2009). Las poblaciones de Dioon merolae De Luca, Sabato y Vázquez-Torres (De Luca et al, 1981), y de otras Cycadales en México, se encuentran severamente amenazadas por cambios en el uso del suelo, por incendios y pastoreo derivados de las actividades humanas, y por prácticas de extracción inadecuadas de partes o individuos completos (Challenger, 1998; Pérez-Farrera y Vovides, 2006;Naranjo et al, 2009).…”

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Historia natural de Dioon Merolae (Zamiaceae)en Chiapas, México

et al. 2012

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Resumen: Se recopilan observaciones sobre la espadaña (Dioon merolae, Zamiaceae) de la Depresión Central (530-600 m) y de la Sierra Madre de Chiapas (1,100-1,200 m). Se visitaron entre 1997 y 2010 más de 800 individuos de distintos tamaños y en todas las etapas fenológicas. Se revisan las relaciones filogenéticas y distribución de D. merolae. A la descripción botánica original se agregan observaciones originales que permiten una mejor comprensión de sus relaciones ecológicas. Se revisa el crecimiento de los tallos desde la etapa de plántula hasta la etapa adulta, la producción de retoños en la base de los tallos, el crecimiento de la raíz, y la producción de hojas, estróbilos y semillas. Se discuten las interacciones entre esta especie vegetal y varios grupos animales implicados en la polinización, herbivoría y dispersión y depredación de las semillas. Se discute el efecto de incendios ocasionales sobre la supervivencia y la reproducción, así como la considerable longevidad y estimación de la edad de D. merolae. La especie enfrenta actualmente severos problemas para su conservación debido a una ceremonia religiosa popular que implica la defoliación completa (a veces parcial) de individuos adultos. Se discuten las implicaciones de esta práctica y algunas recomendaciones para el uso sustentable de la especie. Palabras clave: Cycadales, espadaña, Eumaeus, fitómeros, Liomys. Abstract:We compiled observations from six populations of Dioon merolae (Zamiaceae) located in the Central Depression (530-600 m) and the Sierra Madre of Chiapas (1,100-1,200 m). More than 800 individuals of different size and in all phenological stages were visited during 1997 and 2010. A revision of the phylogenetical relationships and distribution of D. merolae is included, along with a botanical description complemented with original observations. The growth of stems is described from seedlings up to adult plants, as well as the production of basal suckers, root growth, and the production of leaves, strobili and seeds. Plant-animal interactions involved in pollination, herbivory, and seed dispersal and predation are described. The effects of occasional wild fires on survival and reproduction are discussed, as well as the longevity and age estimation of this long-lived species. D. merolae populations are severely threatened due to a local religious ceremony in which adult plants are heavily or almost completely (sometimes partially) defoliated. The conservation implications of this practice are discussed.

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CAM-cycling in the cycad Dioon edule Lindl. in its natural tropical deciduous forest habitat in central Veracruz, Mexico

Cited by 26 publications

References 26 publications

The evolution of inorganic carbon concentrating mechanisms in photosynthesis

The evolution of inorganic carbon concentrating mechanisms in photosynthesis

Evolution along the crassulacean acid metabolism continuum

Historia natural de Dioon Merolae (Zamiaceae)en Chiapas, México

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