Guarianthe, a generic name for the “Cattleya” skinneri complex

Dressler, Robert L.; Higgins, Wesley E.

doi:10.15517/lank.v3i2.23009

Cited by 10 publications

(5 citation statements)

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“…In 2003, the Guarianthe genus was separated from Cattleya Lindl. based on several structural features of the plants and was supported by a recent molecular DNA analysis (Dressler & Higgins, 2003). erefore, before the paper of R. Dressler and W. Higgins was published, G. bowringiana was known as Cattleya bowringiana Veitch (van den Berg et al, 2000), which is now considered as a synonym of G. bowringiana (Dressler et al, 2005;"Guarianthe bowringiana, " 2021).…”

Section: Introductionmentioning

confidence: 95%

Structural Adaptation and Antioxidant Response of Guarianthe bowringiana (O’Brien) Dressler & W. E. Higgins (Orchidaceae Juss.) Seedlings During Ex Vitro Acclimatization

et al. 2021

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Guarianthe bowringiana is one of the oldest samples cultivated at NBG’s orchid unit glasshouses since 1970s. An efficient protocol for asymbiotic in vitro seed germination of G. bowringiana has previously been established. Given that acclimatization is a crucial step in micropropagation, this study assesses the structural adaptation and antioxidant response of G. bowringiana seedlings during ex vitro acclimatization to ex vitro conditions. The leaf surface micromorphology of the G. bowringiana juvenile plants propagated in vitro from seeds as well as the leaves of adult plants cultivated in glasshouse were analyzed using scanning electron microscopy. The levels of lipid peroxidation (TBARS level), superoxide dismutase (SOD) activity, and the photosynthetic activity were monitored for seven days from the transfer of seedlings from the in vitro cultivation vessels as they are markers indicating the response of the leaves of in vitro propagated G. bowringiana plants to oxidative stress during the early stages of acclimatization to ex vitro conditions. During the initial 2 days of the monitored acclimatization period (0–7 days), the level of photosynthetic pigments (chlorophyll a , b , and carotenoid content) increased, followed by an insignificant increase during the successive period (by the seventh day) of acclimatization. At the same time, the level of the tested antioxidant enzyme (SOD) exhibited an increasing trend throughout the acclimatization period. The SOD activities in the leaves of G. bowringiana seedlings were significantly affected when they were transferred from in vitro to ex vitro conditions due to drought stress. Thus, it was revealed that in the early stages of acclimatizing to the altered environments, G. bowringiana seedlings exhibited a rapid increase in photosynthetic pigments, superoxide dismutase activity, and lipid peroxidation levels after being transferred to ex vitro conditions. Comparison of the leaf micromorphologies of G. bowringiana plants grown under in vitro and those grown under ex vitro conditions revealed that leaf development had undergone significant changes during acclimatization to the altered conditions. In vitro to ex vitro transfer leads to a transient decrease in photosynthetic parameters.

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Section: Introductionmentioning

confidence: 95%

Structural Adaptation and Antioxidant Response of Guarianthe bowringiana (O’Brien) Dressler & W. E. Higgins (Orchidaceae Juss.) Seedlings During Ex Vitro Acclimatization

et al. 2021

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“…Cuando tenía 10 años de edad, su padre murió trágicamente; su madre decidió migrar hacia California, porque sola no podía hacerse cargo de la finca y, además, quería estar cerca de su familia (Dressler, 2019). Robert decía en broma que nació en la sierra de Ozark, pero salió a la civilización en California (Dressler & Higgins, 2003). En 1945 el terminó la secundaria y se alistó en el ejército de los EE.UU.…”

Section: Artículo Especialunclassified

Mis memorias sobre Robert L. Dressler (1927 - 2019): Botánico y ser humano extraordinario

Morales

2020

RBT

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This text honors the memory of the great orchidologist Robert L. Dressler, who was considered as the best world orchid specialist along decades. It includes biographical data, jottings and facts about Dr. Dressler’s work, specially in Costa Rica. He described 12 superior Orchidaceous taxa, 18 orchid genera, 230 orchid species, 10 species of other plant groups, and 38 bee species. Moreover, he published 162 new name combinations of Orchidaceae and 10 combinations of Euphorbiaceae, nine books, and 252 scientific papers. The scientific work of Dr. Dressler has had great positive impact on botanists, students, and orchid aficionados.

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“…Esta planta se puede encontrar en intervalos de distribución altitudinal desde 100-1 000 msnm (Damon & Colín-Martínez, 2004). La orquídea G. skinneri anteriormente estaba incluida en el género de las Cattleya, pero recientemente y tras análisis de filogenia molecular se incluyó en el género Guarianthe (Dressler & Higgins, 2003). Florece en los meses de febrero y mayo en la estación seca (Vargas-Zamora & Gómez-Laurito, 2005) durante las fechas de la fiesta religiosa de la Candelaria, siendo esta la razón de la reducción de sus poblaciones silvestres por la excesiva recolecta para fines ceremoniales (Bogarín & Pupulin, 2007).…”

Section: Rizobacterias Promotoras De Crecimientounclassified

Rizobacterias promotoras de crecimiento en Guarianthe skinneri (Orchidaceae)

Diaz

Bertolini

Castañeda

et al. 2018

RBT

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The Guarianthe skinneri orchid is included in NOM-059-ECOL-2010, Mexico standard as an endangered species. In order to study PGPR (promoting growth plant rhizobacteria) from this orchid, 10 roots were collected from different plants to isolate bacteria associated with the roots, which were analyzed by in vitro tests such as: production of AIA, nitrogen fixation, interaction with the mycorrhizal fungus Thanatephorus sp. strain RG26 and phosphate solubilization. We obtain 71 bacterial isolates, 10 strains of them were characterized by sequencing with the 16d rDNA marker identifying six bacteria: Sphingomonas sp. Sinorhizobium sp. Bacillus sp. Nocardia cerradoensis, Bacillus megaterium and Burkholderia phytofirmans. We observed that the bacterium Sinorhizobium sp. produced a greater amount of AIA (69.189 μg/ml) and Bacillus sp. performed greater acetylene reduction (10.251 nmol cultivo/96h). In the interactions of the bacteria and the fungus RG26, four categories were presented (extremely positive, positive, antagonism 50-50 and inhibition). In relation to the solubilization of phosphate, Burkholderia phytofirmans presented higher IS after 48 and 96 hr with an IS of 3.11 and 3.48, respectively. The results indicate that Bacillus sp. it could have the best characteristics to promote the development of the G. skinneri orchid by inoculating seeds and seedlings.

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Guarianthe, a generic name for the “Cattleya” skinneri complex

Cited by 10 publications

References 0 publications

Structural Adaptation and Antioxidant Response of Guarianthe bowringiana (O’Brien) Dressler & W. E. Higgins (Orchidaceae Juss.) Seedlings During Ex Vitro Acclimatization

Structural Adaptation and Antioxidant Response of Guarianthe bowringiana (O’Brien) Dressler & W. E. Higgins (Orchidaceae Juss.) Seedlings During Ex Vitro Acclimatization

Mis memorias sobre Robert L. Dressler (1927 - 2019): Botánico y ser humano extraordinario

Rizobacterias promotoras de crecimiento en Guarianthe skinneri (Orchidaceae)

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