Leaf Epidermis of the Rheophyte<i>Dyckia brevifolia</i>Baker (Bromeliaceae)

Lobo, Ghislaine Maria; Souza, Thaysi Ventura de; Voltolini, Caroline Heinig; Reis, Ademir; Santos, Marisa

doi:10.1155/2013/307593

Cited by 5 publications

(2 citation statements)

References 16 publications

(20 reference statements)

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“…ickening of the outer cell wall of the leaf epidermis protects against dehydration, and is observed in different species of plants which are exposed to intense insolation and in regions with low water availability (Kalashnyk et al, 2016;Lobo et al, 2013;Nuzhyna & Tkachuk, 2019;Nuzhyna et al, 2020;Schreiber et al, 2006). Such thickening of the cell wall was found in plants of genotypes DAR12 and L59.…”

Section: Discussionmentioning

confidence: 95%

Preservation of Features of Anatomical Polymorphism of Deschampsia antarctica É. Desv. (Poaceae) During In Vitro Clonal Reproduction

et al. 2021

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We studied the anatomical features of the leaf structure of Deschampsia antarctica É. Desv. (Poaceae) obtained from seeds collected from different habitats of the maritime Antarctic. These plants have been maintained in culture in vitro for more than 7 years. The plants include stable chromosome forms comprising diploids (2 n = 26), a diploid plant with B-chromosomes (2 n = 26 + 0–3B), a triploid with rearranged chromosome morphology, and myxoploids with different ratios of diploid and nondiploid cells in the root meristem. The D. antarctica plants that were studied generally had a similar anatomical structure in culture in vitro and in nature. At the same time, plants of different cultivated genotypes also displayed their own leaf structure features. In particular, qualitative features included asymmetric four-ribs and five-rib leaves instead of typical three-rib leaves for some genotypes, some individuals characterized by the presence of unicellular nonglandular pointed trichomes on an adaxial side, differences in vascular bundle sheath, and other features. No clear dependence of the anatomical structural features on the chromosomal status of the studied genotypes was evident. At the same time, differences were evident in traits that included the number of stomata, thickness of the outer cell walls of the epidermis, bundles sheath state, number of leaf ribs, and the persistent presence of trichomes under prolonged in vitro cloning. The findings indicate that D. antarctica plants collected from different locations of the maritime Antarctic for long-term cultivation in vitro under standard cultivation conditions retain the anatomical characteristics of the wild plants. The polymorphism of in vitro-cultivated plants is not related to the polymorphism of their karyotype, but is apparently due to the heterogeneity of the original plants and possibly the epigenetic fixation of a number of anatomical features produced in the natural microhabitats of D. antarctica populations.

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Section: Discussionmentioning

confidence: 95%

Preservation of Features of Anatomical Polymorphism of Deschampsia antarctica É. Desv. (Poaceae) During In Vitro Clonal Reproduction

et al. 2021

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“…3A, C, D). Lobo et al (2013) consider these characteristics of Dyckia epidermis to reflect a xeromorphic condition common to the genus, being that the taxonomic use of this layer is limited due to its structural simplification in the stamens.…”

Section: Resultsmentioning

confidence: 99%

Stamen morphoanatomy of Dyckia Schult.f. (Bromeliaceae, Pitcairnioideae) species: new data for taxonomic use

et al. 2016

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Th is study presents a morphoanatomical analysis of Dyckia ibicuiensis, D. polyclada and D. racinae stamens. Flowers at anthesis were desiccated and their stamens were processed using common microtechniques for light microscopic analysis. Morphologically, the androecium in these species is diff erentiated by the disposition of the stamens around the gynoecium and by general anther characteristics. Included stamens, with antesepalous fi laments diff erent from those of the antepetalous, anthers in a radial disposition, always curved, and sporangia facing the gynoecium characterize D. ibicuiensis and D. racinae. Th is confi guration results from the fi lament connation, as well as special anatomical characteristics of the anthers, such as the connective with thickenings. In addition, these species are diff erentiated by the U-shaped thickening in the endothecium. D. polyclada is characterized by its small, free and exserted stamens, with a very short common tube, its anthers, that are not curved or organized around the gynoecium, and its divergent sporangia. Th e anatomical and morphological characteristics identifi ed here are important for characterization of these species. Considering that the androecium is important in the delimitation of Dyckia, the increased use of these data should be equally important for other species and infrageneric groupings.

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The Amazonian Croton mollis (Euphorbiaceae): morphology and leaf anatomy help to understand its preference for the extreme igapó habitat

Vitarelli

Somavilla

Ferrari

et al. 2021

Flora

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Leaf Epidermis of the RheophyteDyckia brevifoliaBaker (Bromeliaceae)

Cited by 5 publications

References 16 publications

Preservation of Features of Anatomical Polymorphism of Deschampsia antarctica É. Desv. (Poaceae) During In Vitro Clonal Reproduction

Preservation of Features of Anatomical Polymorphism of Deschampsia antarctica É. Desv. (Poaceae) During In Vitro Clonal Reproduction

Stamen morphoanatomy of Dyckia Schult.f. (Bromeliaceae, Pitcairnioideae) species: new data for taxonomic use

The Amazonian Croton mollis (Euphorbiaceae): morphology and leaf anatomy help to understand its preference for the extreme igapó habitat

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