Micromorfología foliar del género Quercus (Fagaceae) en México

Scareli-Santos, Claudia; Sánchez-Mondragón, María L.; González‐Rodríguez, Antonio; Oyama, Ken

doi:10.21829/abm104.2013.56

Cited by 11 publications

(3 citation statements)

References 31 publications

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“…(a) (b) The low gs,max in water-saving plant species does not only lie with a reduced stomatal density. The development of an external structure that reduces the stomatal pore area by the deposition of epicuticular waxes, in the form of a protruding overarch, has been described in different Quercus species living in dry habitats [133,134]. A deep functional study about the possible role of this drastic reduction of effective stomatal pore area in Q. coccifera was performed by Roth-Nebelsick et al [135], who evidenced its influence in the reduced value of gs,max showed by this species.…”

Section: Water Saver Strategy Regulates Water Loss At the Expense Of mentioning

confidence: 98%

Living in Drylands: Functional Adaptations of Trees and Shrubs to Cope with High Temperatures and Water Scarcity

Peguero‐Pina

Vilagrosa

Alonso-Forn

et al. 2020

Forests

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Plant functioning and survival in drylands are affected by the combination of high solar radiation, high temperatures, low relative humidity, and the scarcity of available water. Many ecophysiological studies have dealt with the adaptation of plants to cope with these stresses in hot deserts, which are the territories that have better evoked the idea of a dryland. Nevertheless, drylands can also be found in some other areas of the Earth that are under the Mediterranean-type climates, which imposes a strong aridity during summer. In this review, plant species from hot deserts and Mediterranean-type climates serve as examples for describing and analyzing the different responses of trees and shrubs to aridity in drylands, with special emphasis on the structural and functional adaptations of plants to avoid the negative effects of high temperatures under drought conditions. First, we analyze the adaptations of plants to reduce the input of energy by diminishing the absorbed solar radiation through (i) modifications of leaf angle and (ii) changes in leaf optical properties. Afterwards, we analyze several strategies that enhance the ability for heat dissipation through (i) leaf size reduction and changes in leaf shape (e.g., through lobed leaves), and (ii) increased transpiration rates (i.e., water-spender strategy), with negative consequences in terms of photosynthetic capacity and water consumption, respectively. Finally, we also discuss the alternative strategy showed by water-saver plants, a common drought resistance strategy in hot and dry environments that reduces water consumption at the expense of diminishing the ability for leaf cooling. In conclusion, trees and shrubs living in drylands have developed effective functional adaptations to cope with the combination of high temperature and water scarcity, all of them with clear benefits for plant functioning and survival, but also with different costs concerning water use, carbon gain, and/or leaf cooling.

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Section: Water Saver Strategy Regulates Water Loss At the Expense Of mentioning

confidence: 98%

Living in Drylands: Functional Adaptations of Trees and Shrubs to Cope with High Temperatures and Water Scarcity

Peguero‐Pina

Vilagrosa

Alonso-Forn

et al. 2020

Forests

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“…5 ). In this sense, it is still necessary to quantitatively evaluate the density of trichomes in the leaf lamina, as well as the epidermis type to find out if there are differences among the different taxa (Fortini et al 2015 ; López-Caamal et al 2017 ; Scareli-Santos et al 2013 ; Tschan and Denk 2012 ).…”

Section: Discussionmentioning

confidence: 99%

Leaf morphometric analysis and potential distribution modelling contribute to taxonomic differentiation in the Quercus microphylla complex

De Luna-Bonilla,

Valencia-Á,

Ibarra-Manríquez

et al. 2023

J Plant Res

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Mexico is a major center of evolutionary radiation for the genus Quercus, with oak species occurring across different habitat types and showing a wide variation in morphology and growth form. Despite representing about 20% of Mexican species, scrub oaks have received little attention and even basic aspects of their taxonomy and geographic distribution remain unresolved. In this study, we analyzed the morphological and climatic niche differentiation of scrub oak populations forming a complex constituted by six named species, Quercus cordifolia, Quercus frutex, Quercus intricata, Quercus microphylla, Quercus repanda, Quercus striatula and a distinct morphotype of Q. striatula identified during field and herbarium work (hereafter named Q. striatula II). Samples were obtained from 35 sites covering the geographic distribution of the complex in northern and central Mexico. Morphological differentiation was analyzed through geometric morphometrics of leaf shape and quantification of trichome traits. Our results indicated the presence of two main morphological groups with geographic concordance. The first was formed by Q. frutex, Q. microphylla, Q. repanda and Q. striatula, distributed in the Trans-Mexican Volcanic Belt, the Sierra Madre Occidental and a little portion of the south of the Mexican Altiplano (MA). The second group consists of Q. cordifola, Q. intricata and Q. striatula II, found in the Sierra Madre Oriental and the MA. Therefore, our evidence supports the distinctness of the Q. striatula II morphotype, indicating the need for a taxonomic revision. Within the two groups, morphological differentiation among taxa varied from very clear to low or inexistent (i.e. Q. microphylla-Q. striatula and Q. cordifolia-Q. striatula II) but niche comparisons revealed significant niche differentiation in all pairwise comparisons, highlighting the relevance of integrative approaches for the taxonomic resolution of complicated groups such as the one studied here.

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“…y Gual, 2014), usos (Luna-José et al, 2003), exploración de caracteres de importancia taxonómica en el género (Valencia y Barajas-Morales, 1995;Valencia y Delgado, 2003;Vázquez, 2006;Pérez-Olvera y Dávalos-Sotelo, 2008;Scareli-Santos et al, 2013), taxonomía de algunos complejos de especies (Valencia, 2005;Romero, 2006; Vázquez y Nixon 2013) y de diversidad en algunas entidades (Banda, 1974;González-Villarreal, 1986;Bello y Labat, 1987;De la Cerda, 1989;Valencia, 1989Valencia, y 1995Vázquez, 1992;Encina y Villareal, 2002;Romero et al, 2002;Villarreal et al, 2008;Sabás, 2011;Valencia y Nixon, 2011). No obstante el interés y la gran cantidad de información acumulada para este taxon, aún faltan por realizar estudios básicos para conocer con precisión la riqueza específica regional y estatal del género Quercus en México.…”

Section: Introductionunclassified

Estudio preliminar del género Quercus (Fagaceae) en Tamaulipas, México

Mojica

Valencia-A.

2017

Acta Bot. Mex.

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Estudio preliminar del género Quercus (Fagaceae) en Tamaulipas, México AbstRAct:Background and Aims: The state of Tamaulipas is located in northeastern Mexico, a region considered species-rich in oaks; however, inventories and tools for identifying species of the genus Quercus are lacking. The aim of this work is to know the species richness of the genus Quercus in Tamaulipas, as well as provide tools for identifying them. Methods:The specimens of the genus Quercus deposited in the herbaria CHAP, ENCB, FCME, HUAP, INEGI, INIF and MEXU were reviewed; additionally, the scanned specimens of the genus Quercus of Tamaulipas from the herbaria MO and K were consulted on the Tropicos web page, as well as the types available on the page JSTOR Global Plants. Parallely, publications about Tamaulipas with emphasis on floristic lists including the genus Quercus were reviewed, resulting in a preliminary list of species collected and reported for this state. The review of specimens and the recognition of respective synonyms allowed to purify the list of species. Based on this information descriptions of the oak species were prepared. Key results: We recognize and describe 37 species of the genus Quercus for Tamaulipas; 20 belong to the section Lobatae and 17 to the section Quercus. In addition, a dichotomous identification key is provided, as well as drawings, distribution and phenological data of each species. Conclusions:The presence of Quercus durifolia, Q. invaginata, Q. paxtalensis, and Q. potosina has been confirmed, which had not been mentioned before for the state. Tamaulipas ranks fifth in terms of oak richness, after the states of Oaxaca, Puebla, San Luis Potosí, and Jalisco. Oak species richness is concentrated in southern Tamaulipas. Miquihuana, Jaumave, and Victoria are the municipalities with the largest diversity of oaks. Fieldwork should be carried out to increase collections, which will certainly result in modification of the species numbers of the present study.

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Micromorfología foliar del género Quercus (Fagaceae) en México

Cited by 11 publications

References 31 publications

Living in Drylands: Functional Adaptations of Trees and Shrubs to Cope with High Temperatures and Water Scarcity

Living in Drylands: Functional Adaptations of Trees and Shrubs to Cope with High Temperatures and Water Scarcity

Leaf morphometric analysis and potential distribution modelling contribute to taxonomic differentiation in the Quercus microphylla complex

Estudio preliminar del género Quercus (Fagaceae) en Tamaulipas, México

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