Nocturnal versus diurnal CO2 uptake: how flexible is Agave angustifolia?

Winter, Klaus; García, M.; Holtum, Joseph A. M.

doi:10.1093/jxb/eru097

Cited by 15 publications

(20 citation statements)

References 34 publications

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“…It was reported that the obligate CAM plant, Agave deserti, could switch from a strong CAM type to a C 3 type pattern when plants were watered extensively (Hartsock and Nobel 1976). However, the day/night pattern of CO 2 exchange in the obligate CAM plant, A. angustifolia, did not shift towards the C 3 pattern completely when the supply of water was effectively unlimited (Winter et al 2014 (4:006:00 h), respectively. We also consider this the phenomenon of "CAM idling".…”

Section: Discussionmentioning

confidence: 99%

Identification of obligate C<sub>3</sub> photosynthesis in Dendrobium

Qiu¹,

Sultana²,

Liu³

et al. 2015

Photosynt.

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Dendrobium is one of the three largest genera in the Orchidaceae and is distributed throughout various habitats. We investigated photosynthesis in seven Dendrobium species and cultivars by comparing their leaf δ 13 C values, titratable acidity, and CO 2 exchange in well-watered and drought-stressed conditions. In addition, the leaf thickness and mesophyll succulence index (S m ) were measured in well-watered conditions. Our results indicate that Dendrobium loddigesii is a typical obligate (or constitutive) CAM plant because the leaf δ

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Section: Discussionmentioning

confidence: 99%

Identification of obligate C<sub>3</sub> photosynthesis in Dendrobium

Qiu¹,

Sultana²,

Liu³

et al. 2015

Photosynt.

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“…Esto concuerda con los datos experimentales de este y otros agaves que demuestran que la radiación fotosintéticamen-te activa, junto con el agua, es uno de los principales factores limitantes de las tasas fotosintéticas en individuos juveniles y adultos (Winter et al, 2014).…”

Section: Discussionunclassified

Factores ambientales relacionados con la cobertura de Agave angustifolia (Asparagaceae) en el matorral costero de Yucatán, México

2018

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Resumen:Antecedentes y Objetivos: Agave angustifolia, o chelem, es el único maguey silvestre de la Península de Yucatán y es el ancestro de especies domesticadas de gran valor económico y cultural. Presta importantes servicios ambientales como recurso alimenticio para la fauna, fijación de suelos arenosos y captura de carbono en ambientes áridos con suelos pobres. Es un cultivo potencial de cara al aumento de las sequías predichas para la región y del empobrecimiento genético del henequén. El objetivo de este trabajo es recabar datos sobre la densidad de sus poblaciones, su patrón espacial, estructura poblacional y la relación entre su abundancia y los factores ambientales en el matorral costero de Yucatán, con el fin de evaluar su uso en la restauración ecológica. Métodos: Se muestrearon tres localidades costeras: Chuburná (Ch), San Benito (SB) y Río Lagartos (RL). En SB y RL se trazaron 36 cuadrantes de 4 m 2 ; dentro de cada uno se estimó el porcentaje de cobertura de Agave angustifolia, el de los arbustos de más de 1 m de alto y la cobertura de mantillo. Se tomaron muestras de suelo a las que se analizó pH, conductividad eléctrica, nitrógeno total, materia orgánica y escala de gris. Se describieron la densidad poblacional, distribución espacial y estructura por tamaños de A. angustifolia en SB y Ch.Resultados clave: La cobertura de Agave angustifolia se correlaciona negativamente con la cobertura de arbustos y mantillo, y cantidad de materia orgánica. Las densidades de su población fueron inferiores a 0.1 individuos/m 2 , hubo una mayor proporción de plántulas y su distribución espacial es agregada. Conclusiones: Al soportar suelos pobres, altas temperaturas y radiación solar, la especie puede servir para restaurar algunas funciones ecológicas en las zonas más áridas de la costa donde la vegetación ha sido severamente dañada. Palabras clave: Arenosol, distribución espacial, estructura poblacional, suculenta, taxon emparentado con cultivos, zonas semiáridas. AbstRAct:Background and Aims: Agave angustifolia, or chelem, is the only wild species of the Yucatán Peninsula and is the ancestor of cultivated species with great economic and cultural values. It provides important environmental services such as food source for fauna, it fixes sandy soils and sequesters carbon in arid habitats with poor soils. It is a potential crop that may face the dryness exacerbation expected for the region and the genetic erosion of henequen. The aim of this work is to gather data about its population density, spatial pattern, size structure, and the relationship between its abundance and environmental factors of the Yucatán coastal scrublands, in order to assess the use of the species for ecological restauration purposes. Methods: Field work was carried out in three coastal sites: Chuburná (Ch), San Benito, (SB) and Río Lagartos (RL). Thirty six 4 m 2 plots were placed in SB and RL; we estimated the relative cover of Agave angustifolia, shrubs higher than 1 m and litter in each plot. Potential of Hidrogen (pH), electric conductivit...

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“…Many species of Agave are known to open stomata at night favoring CO 2 capture and minimizing water loss through transpiration . In addition, studies of photosynthesis‐related CO 2 assimilation in Agave have found that CO 2 exchange can be affected by temperature, drought, and CO 2 enrichment . There is evidence of stress by drought having effects on some quantitative characteristics of plants from several species of Agave .…”

Section: Drought and High‐temperature Avoidance Of Agave Lmentioning

confidence: 99%

“…Such physiological behavior is stimulated by CO 2 enrichment (800 ppm) during the night. At CO 2 concentrations of 800 ppm, fixation in A. angustifolia increases by 62% relative to values of CO 2 fixed at concentrations of 200 and 400 ppm . In addition, at values from −2.37 to −1.72 MPa, A. deserti and A. tequilana “Azul” lower their hydraulic conductivity ( K h ) by 50% in periods of 2 and 12 h at a temperature of 35°C, respectively.…”

Section: Drought and High‐temperature Avoidance Of Agave Lmentioning

confidence: 99%

“…The American plant genus Agave L. includes over 200 species, of which 166 are distributed throughout México . The crassulacean acid metabolism (CAM), superficial root system, and succulent leaves with thick, waxy cuticle of the species of Agave provides them with adaptive advantage in an ample range of geographical zones, as a result of their resistance to abiotic and biotic environmental factors including drought, salinity, extreme temperatures, and pathogens . These genetic, morphological, and physiological skills of economically important crops in the genus Agave make its species promising for minimizing the risk of losses as a result of the global climate change in present and future biotechnological applications .…”

Section: Introductionmentioning

confidence: 99%

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Review and in silico analysis of fermentation, bioenergy, fiber, and biopolymer genes of biotechnological interest inAgaveL. for genetic improvement and biocatalysis

Tamayo‐Ordóñez

Ayil‐Gutiérrez

Tamayo-Ordóñez

et al. 2018

Biotechnology Progress

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Several of the over 200 known species of Agave L. are currently used for production of distilled beverages and biopolymers. The plants live in a wide range of stressful environments as a result of their resistance to abiotic stress (drought, salinity, and extreme temperature) and pathogens, which gives the genus potential for germplasm conservation and biotechnological applications that may minimize economic losses as a result of the global climate change. However, the limited knowledge in the genus of genome structure and organization hampers development of potential improved biotechnological applications by means of genetic manipulation and biocatalysis. We reviewed Agave and plant sequences in the GenBank NCBI database for identifying genes with biotechnological potential for fermentation, bioenergy, fiber improvement, and in vivo plant biopolymer production. Three-dimensional modeling of enzyme structures in plant accessions revealed structural differences in sucrose 1-fructosyltransferase, fructan 1-fructosyltransferase, fructan exohydrolase (1-FEH), cellulose synthase (CES), and glucanases (EGases) with possible effects in fructan, sugar, and biopolymer production. Although the coding genes of FEH and enzymes involved in biopolymer production (CES, sucrose synthase, and EGases) remain unidentified in Agave L., our results could aid isolation of such genes in Agave. By comparing nucleotide and amino acid sequences in accessions of Agave and other plants, knowledge may be gained about transcriptional regulation and enzymatic activity factors. Future study is needed of biotechnological application of Agave genes for crop breeding aided by genetic engineering and biocatalysis.

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Nocturnal versus diurnal CO2 uptake: how flexible is Agave angustifolia?

Abstract: SummaryIn young and mature plants of the CAM species Agave angustifolia, the day/night pattern of CO2 exchange was highly conserved under a range of environmental conditions.

Cited by 15 publications

References 34 publications

Identification of obligate C<sub>3</sub> photosynthesis in Dendrobium

Identification of obligate C<sub>3</sub> photosynthesis in Dendrobium

Factores ambientales relacionados con la cobertura de Agave angustifolia (Asparagaceae) en el matorral costero de Yucatán, México

Review and in silico analysis of fermentation, bioenergy, fiber, and biopolymer genes of biotechnological interest inAgaveL. for genetic improvement and biocatalysis

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