Systematic relevance of pollen morphology in tribe Hylocereeae (Cactaceae)

Ruiz-Domínguez, Catalina; Vovides, Andrew P.; Sosa, Victoria

doi:10.3897/phytokeys.128.35842

Cited by 9 publications

(7 citation statements)

References 40 publications

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“…Por las variables peso y °Brix, tres accesiones cumplen con los requisitos para ser sembradas comercialmente, sin embargo es necesario evaluar una modificación en las labores de cultivo para tratar de aumentar el tamaño de los frutos. T he genus Hylocereus belongs to the Cactaceae family, and recently was included in Selenicereus group (Korotkova et al, 2017); however, other authors suggest that it is important to evaluate morphological, ecological, and molecular traits to support the group position (Ruiz-Domínguez et al, 2019). In Selenicereus, there are native hemiepiphyte species from the American tropical regions considered valuable for their fruits.…”

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Morphological characterization of the red dragon fruit - Selenicereus undatus (Haw.) D.R. Hunt – under growing conditions in the municipality of San Jerónimo (Antioquia, Colombia)

Betancur

Muriel

Gonzalez

2020

Rev. Fac. Nac. Agron. Medellín

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The red dragon fruit Selenicereus undatus is a native fruit from the Americas. Its growing appeal in the international market as an exotic fruit highlights the relevance of the crop for the local economies. In Colombia, the high diversity within the genus and species makes it difficult to have reliable materials for propagation as cultivars. This agronomic challenge requires more studies of the distribution and real diversity within the genus Selenicereus sp. Due to the information aforementioned, the fruit is harvested in small localities as an extraction production system. This project aimed to morphologically characterize the working collection of red dragon fruit under growing conditions in the Municipality of San Jerónimo. It contained 30 accessions from the departments of Antioquia, Córdoba, and Valle del Cauca. Twenty-one characters of cladode, flower, and fruit were quantified to assess the diversity, and a restricted cluster analysis was performed to understand the morphological richness of the materials. As a result, it was observed differences in terms of stems, such as distance between areolas and width of cladode. This was also observed in flowers, in which their total length, the width of petals, the presence of trichomes, the color of calyx and petals, and the color of the stigma were different. Also, differences were recorded in the fruit. Characteristics such as weight and color of its skin were assessed, resulting in fruit size medium to small. Regarding other properties, total soluble solids varied between 11.2 to 15.6 °Brix. 55% of the fruits have measurements that fit market requirements. Finally, three accessions match the requirements of weight and °Brix, to be used as possible genotypes by commercial growers; however, studies about agronomic management strategies that favor an increase in fruit weight must be done.

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Morphological characterization of the red dragon fruit - Selenicereus undatus (Haw.) D.R. Hunt – under growing conditions in the municipality of San Jerónimo (Antioquia, Colombia)

Betancur

Muriel

Gonzalez

2020

Rev. Fac. Nac. Agron. Medellín

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“…Burelo-Ramos et al (2009) gives an example where pollen morphology can still provide additional characters to evaluate possible monophyletic groups within a complex of species, which might support some of the genera currently included in Pithecocteniinae (Bignoniaceae). Ruíz-Domínguez et al (2019) found seven pollen morphological attributes (five qualitative and two continuous) in the tribe Hylocereeae (Cactaceae) that exhibited useful variation. Brevicolpate pollen grains were shared by Kimnachia ramulosa and Pseudorhipsalis amazonica.…”

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Pollen morphology of the Megamexican cycads reveals the potential of morphometrics to identify cycad genera

Vovides¹,

Guevara²,

Coiro³

et al. 2020

Bot. Sci.

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Background: Although pollen morphology has always been an important tool in plant systematics, the possibility of distinguishing between related taxa is still debated. A difficult case is the cycads, where their morphology and small size is very similar. Pollen morphology has been important in plant systematics and determination at the species level is possible depending on the group. Controversial cases are the cycads, where their small pollen and smooth sculpture when observed under light microscopy present few useful characters for separation at the species level. Question: Will cycad pollen morphometry be useful to distinguish taxa? Study species: 15 species within the genera Ceratozamia, Dioon and Zamia were investigated with five species of each genus. Methods: Pollen was obtained from both live specimens from the Clavijero Botanic Garden of the Instituto de Ecología, A.C., as well as herbarium specimens. Acetolyzed pollen was used for descriptions and morphometry, and non-acetolyzed pollen for SEM images. Results: The thickness of the exine and pollen sculpture of Dioon differed from that of Ceratozamia and Zamia thus allowing its identification. The pollen morphology of Ceratozamia and Zamia is very similar and therefore difficult to distinguish between species. Conclusions: The thicker exine of Dioon allows its pollen to be distinguished from the other two genera. Morphometric methods must be applied to distinguish pollen between species of Ceratozamia and Zamia.

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“…The pollen terminology used was from Erdtman (1954Erdtman ( , 1969, Wagenitz (1955), Faegri and Iversen (1975), Punt et al (2007), Punt and Hoen (2009), Yurtseva et al (2014), Halbritter et al (2018) , and Ruiz-Domínguez et al (2019.…”

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“…Measurements were made using Kameram 21 software based on at least 30 or more pollen grains from each specimen. The apocolpium (t) measurements was done according to Ruiz-Domínguez et al (2019) and amb dimensions was done according to Erdtman (1969).…”

Section: Microscopic Studiesmentioning

confidence: 99%

Usefulness of palynomorphological characteristics for the identification of species Cyanus Mill. (Asteraceae) in Turkey: a taxonomic approach

Çıtak¹,

Şirin²,

Dural³

et al. 2020

Turk J Bot

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IntroductionThe family Asteraceae is the largest and the most cosmopolitan of the flowering plants and is presumably the most widespread in the Mediterranean (Attard and Cuschieri, 2009). Centaurea L., is a large genus belongs to the tribe Cardueae, comprises approximately 250 species (Susanna and Garcia-Jacas, 2009) and of its 181 species are growing in Turkey (Uysal, 2012), and since then, the number of the taxa has reached 205, with the latest additions (Şirin et al. 2020). Worldwide, the subgenus Cyanus is represented by about 25 species (Hellwig, 2004) and 21 of them are distributed in Turkey (Uysal, 2012).Recent definitions of Centaurea (Susanna and Garcia-Jacas, 2009) include the subgenera Acrocentron, Centaurea, and Cyanus, and although the sister relationship of the latter two has been clearly established, the relationships between them and Acrocentron remain unclear (Susanna and Garcia-Jacas, 2009). Miller (1754) first taxonomically described Cyanus as a genus. Following that, then reassigned the group as a section of Centaurea (De Candolle, 1838), which has been accepted extensively by taxonomists (Bentham, 1873;Boissier, 1875;Wagenitz, 1975). Cyanus is now generally accepted as a subgenus (Hilpold et al., 2014) and very rarely, as a group (Wagenitz and Hellwig, 1996;Garcia-Jacas et al., 2001) within Centaurea, although some researchers have still insisted on it being a genus (Greuter, 2003;Bancheva and Greilhuber, 2006). Distribution of theCyanus group lies across central and southern Europe, North Africa, Anatolia, and the Caucasus. Moreover, some species occur in areas of Iran and Afghanistan (Boršić et al., 2011). Within the scope of the current research, Cyanus was considered as a subgenus, based on current molecular studies (Şirin et al., 2019).Florets in this group are blue or purplish blue in color, with a few taxa having been reported as cream or pale pink, which is highly exceptional for the subtribe Centaureinae. Additionally, the most unusual characteristic is the phyllary appendages, which are non-spiny and decurrent almost down to the base (Wagenitz and Hellwig, 1996). This group also has some significant characteristics in common with groups Jacea and Acrocentron. It has marginal florets that are sterile and do not comprise staminodes, and the seed has a lateral hilum (Garcia-Jacas et al., 2001;Şirin et al., 2017).Aside from its morphological characteristics, the Cyanus group is also distinguished by having two pollen types. In a study by Wagenitz (1955), it was reported that of the eight types of pollen in Centaurea s.l., two types were identified in Cyanus subgroups. One of the subgroups comprises annuals that have the Cyanus pollen type, while the other subgroup comprises perennials that have the Montana pollen type (Figure 1). Species of the subgenus Cyanus have been examined by various researchers in recent years (

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Systematic relevance of pollen morphology in tribe Hylocereeae (Cactaceae)

Cited by 9 publications

References 40 publications

Morphological characterization of the red dragon fruit - Selenicereus undatus (Haw.) D.R. Hunt – under growing conditions in the municipality of San Jerónimo (Antioquia, Colombia)

Morphological characterization of the red dragon fruit - Selenicereus undatus (Haw.) D.R. Hunt – under growing conditions in the municipality of San Jerónimo (Antioquia, Colombia)

Pollen morphology of the Megamexican cycads reveals the potential of morphometrics to identify cycad genera

Usefulness of palynomorphological characteristics for the identification of species Cyanus Mill. (Asteraceae) in Turkey: a taxonomic approach

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