Comparitative Research of Pollen Morphology of Common Flax Cultivars (<i>Linum usitatissimum</i> L., Linaceae)

Kluza-Wieloch, Magdalena; Maciejewska-Rutkowska, Irmina; Wysakowska, I

doi:10.1080/15440478.2017.1369209

Cited by 2 publications

(3 citation statements)

References 10 publications

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“…The pollen morphology of the species studied here, as well as in previous works (Saad 1961; Erdtman 1966; Xavier 1967; Ockendon 1971; Rogers and Xavier 1971; Rogers 1980, 1982, 1985; Chester and Raine 2001; Perveen and Qaiser 2008; Lattar et al 2012; Talebi et al 2012; Kluza-Wieloch et al 2015, 2018), is accompanied by a variety in floral and fruit morphology within the genus (Xavier et al 1980). Diversification among Linum species in North America, as opposed to those in South America, is mainly attributed to the biogeographical and ecological conditions where they thrive, but also to their evolutionary history (McDill et al 2009; McDill and Simpson 2011; Ruiz-Martín et al 2018).…”

Section: Discussionsupporting

confidence: 75%

“…However, the multivariate statistical analyses defined the degree of importance of these traits in pollen variation, grouping those species that display narrow similarities in pollen morphology and identifying significant differences in three of the 11 species. The application of multivariate statistical analysis was not reported in previous studies on the pollen morphology of Linum (Saad 1961; Erdtman 1966; Xavier 1967; Ockendon 1971; Rogers and Xavier 1971; Rogers 1980, 1982, 1985; Chester and Raine 2001; Perveen and Qaiser 2008; Lattar et al 2012; Talebi et al 2012; Kluza-Wieloch et al 2015, 2018). Therefore, the present work is one of the first efforts to strengthen the conclusions derived from the study of the pollen morphological traits in Linum.…”

Section: Discussionmentioning

confidence: 97%

“…Although palynological work in Linum has been carried out since the 1950s worldwide (Saad 1961; Erdtman 1966; Xavier 1967; Ockendon 1971; Rogers and Xavier 1971; Rogers 1980, 1982, 1985; Chester and Raine 2001; Perveen and Qaiser 2008; Lattar et al 2012; Talebi et al 2012; Kluza-Wieloch et al 2015, 2018), none of these publications includes a comprehensive report on pollen morphology, and there are no studies addressing all species of the genus. As a result, the characteristics of many species of the genus Linum , including the Mexican species, remain unknown.…”

Section: Introductionmentioning

confidence: 99%

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Pollen morphology of endemic Linum species (Linoideae: Linaceae) from Mexico

et al. 2023

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The morphological characteristics of pollen grains of Linum species in Mexico have not previously been evaluated in quantitative terms. This study reports statistical values of pollen characteristics – polar axis, equatorial axis, shape, polar area, exine thickness, sexine thickness, nexine thickness, and height and diameter of ornamental pollen elements – of 11 of the 13 endemic species accepted to date and for which material was available: L. cruciata, L. flagellare, L. lasiocarpum, L. longipes, L. mexicanum, L. modestum, L. orizabae, L. pringlei, L. rzedowskii, L. scabrellum, and L. tenellum. The detailed light and scanning electron microscopy study revealed that the pollen is prolate-spheroidal to subprolate, tricolpate and with semitectate exine sculptured with bacula, clavae, gemmae or spines whose height and diameter follow a homogeneous, intermediate, or heterogeneous pattern. The principal component analysis found that five characters, namely the height of the ornamental elements, sexine thickness, exine thickness, diameter of ornamental elements, and nexine thickness, explained the highest percentage of the variance between species. The cluster and discriminant analyses classified some of the species into three groups and differentiated three of them according to their morphology. The difficulty in distinguishing some species through a conventional approach was solved conveniently using palynological traits since the ornamentation pattern of pollen grains was unique and because grains of various species were statistically different, thus representing a tool for identifying Linum species.

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Section: Discussionsupporting

confidence: 75%

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Pollen morphology of endemic Linum species (Linoideae: Linaceae) from Mexico

et al. 2023

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Can flower forms be indicators of pollen diversity and possible gametophytic selection in marigold breeding programs?

Dedhia,

Samuel

et al. 2024

Preprint

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Pollen shape has been utilized as a taxonomic attribute since it is thought to be the most constant trait within a plant species. The African marigold (Tagetes erecta L.) has substantial variability within the species due to its wider adaptability to various agroclimatic conditions; thus, from a palynological perspective, this species is interesting for studying the variation in its pollen grains. As a commercial flower crop, the breeding programme involves multiple flower forms within the species; hence, the objective of this study was twofold: first, to characterize the typical pollen grain features of marigold and second, to assess the potential variation in pollen morphology in different flower forms across marigold genotypes for possible gametophytic selection in breeding programmes. Nine African marigold plant genotypes with six different flower forms were imaged using a scanned electron microscope to study the characteristic features of the pollen grains. The pollen grains of Tagetes erecta were found to be radially symmetrical, isopolar monads that were oblate spheroidal and suboblate in shape with tricolpi apertures and with echinate erections on the pollen wall. Significant differences were recorded between the genotypes and flower forms for all the pollen morphological features studied. The variability observed among the pollen grain populations within the genotypes for certain morphometric traits also suggested the potential of using gametophytic selection in marigold breeding programs. Although it is important to establish pollen traits for commercial hybridization programs, little information is available, and to our knowledge, this is the first report on characteristic pollen grain features in African marigolds.

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Comparitative Research of Pollen Morphology of Common Flax Cultivars (Linum usitatissimum L., Linaceae)

Cited by 2 publications

References 10 publications

Pollen morphology of endemic Linum species (Linoideae: Linaceae) from Mexico

Pollen morphology of endemic Linum species (Linoideae: Linaceae) from Mexico

Can flower forms be indicators of pollen diversity and possible gametophytic selection in marigold breeding programs?

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