Foliar micromorphology with emphasis on the trichomes diversity and its taxonomic relevance in selected tribes of Asteraceae from Hainan Island

Bahadur, Saraj; Rehman, Shazia; Long, Wenxing; Ahmad, Mushtaq; Ullah, Fazal; Butt, Maryam Akram

doi:10.1016/j.flora.2023.152229

Cited by 5 publications

(2 citation statements)

References 71 publications

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“…The most important epidermal traits are trichome types, shape of epidermal cells, stomata types, stomata position, and subsidiary cells. These traits are useful for identification purposes and for the determination of phylogenetic relationships between taxa (Metcalf andChalk, 1950, 1979;Jones, 1986;Judd et al, 2008;Ogundipe et al, 2009;Araujo et al, 2010;Zhang et al, 2018;Bahadur et al, 2023).…”

Section: Bulletin Of the Iraq Natural History Museummentioning

confidence: 99%

“…Trichomes on plants are extremely variable in their presence, density, and form; therefore, their morphology and structure could be of taxonomical importance in certain plant groups (Che Amri et al, 2018;Bahadur et al, 2023). According to previous studies by Metcalf and Chalk (1950); dos Reis and Alvim (2013); and Jooste (2015), Oxalis is recognized for having two types of foliar trichomes: glandular and non-glandular trichomes.…”

Section: Ii-foliar Epidermal Characteristicsmentioning

confidence: 99%

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Palynological and Foliar Epidermal Studies of Genus Oxalis Linnaeus, 1753 (Oxalidales, Oxalidaceae) From Egypt

Shamso,

Hosni,

Draz

et al. 2024

Bull. Iraq nat. Hist. Mus.

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By using light microscopy (LM) and scanning electron microscopy (SEM), the pollen grains and foliar epidermal morphology of four species and two varieties of Egyptian Oxalis Linnaeus, 1753 belonging to three sections of the subgenus Oxalis Linnaeus, 1753 were studied. The objective was to determine the importance of pollen and foliar epidermal characters as taxonomic evidence. The current study revealed that the pollen grains of all taxa examined are monads, radially symmetric, isopolar, and of medium size; the shape varied from sub-spheroidal to subprolate. The pollen apertures were tricolpate with ornamented colpal membranes (rugulate, warty, congregated granules). Exine is semi-tectate, with micro-reticulate to reticulate ornamentation, perforate in O. debilis Kunth, 1822. The study also revealed the presence of four types of stomata: actinocytic, anisocytic, anomocytic, and an unusual 4-celled anisocytic. Both abaxial and adaxial epidermal cells were irregular or polygonal in shape, with undulate or straight anticlinal walls and semi-swollen to swollen periclinal walls with dispersed epicuticular wax. Two forms of non-glandular, unicellular trichomes were observed: short clavate and long with a tapering apex and papillate surface. The study further discussed numerical results based on combined morphological, palynological, and foliar epidermal characters. This study is the first report dealing with anatomical and palynological features of the genus Oxalis in Egypt.

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Section: Bulletin Of the Iraq Natural History Museummentioning

confidence: 99%

Section: Ii-foliar Epidermal Characteristicsmentioning

confidence: 99%

Palynological and Foliar Epidermal Studies of Genus Oxalis Linnaeus, 1753 (Oxalidales, Oxalidaceae) From Egypt

Shamso,

Hosni,

Draz

et al. 2024

Bull. Iraq nat. Hist. Mus.

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Palyno-anatomical diversity and its implication in the taxonomy of some Plantaginaceae species

Butt,

Zahid,

Bahadur

et al. 2024

Genet Resour Crop Evol

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Systematic Implications of Palynomorph Diversity Using Microscopic Trends Among Asteraceous Flora From the Drylands of Baluchistan, Pakistan

Sadia,

Ahmad,

Ramadan

et al. 2024

Microscopy and Microanalysis

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Pollen micromorphological traits with taxonomic implications are first reported from the study area for 50 Asteraceous taxa belonging to nine tribes. Cichorieae (21 taxa), Cardueae (11 taxa), Inuleae (six taxa), and Anthemideae (four taxa) are the leading tribes. The research included Cousinia haeckeliae, Himalaiella afghana, Pterachaenia stewartii (endemic to Afghanistan and Pakistan), and Xylanthemum macropodum (endemic to Baluchistan). Light and scanning electron microscopy were employed for the visualization of pollen photomicrographs. The data was analyzed statistically via SPSS, PAST, and Origin. Significant diagnostic qualitative and quantitative palynological traits were explored for discrimination down to the species level within the tribes. All the investigated taxa possessed radial symmetry, isopolarity, and monad form (characters for distinction at the subdivision level). The aperture types were trizonocolporate, tetrazonocolporate, and tricolporate with number position and character (NPC) formulas N3P4C5, N4P4C5, and N3P4C3. Goniotreme, peritreme, and ptychotreme types of amb were recognized. Echinate, echinate lophate, scabrate, and gemmate sculpturing were present with and without perforated surface patterns. Variations in the shapes in polar and equatorial views and lacuna shapes further assisted the separation of taxa. The observed shape classes were perprolate, prolate spheroidal, prolate, subprolate, oblate spheroidal, suboblate, and oblate. Principal component analysis, correlation, standard probability plots, and ridge line paired features plot for quantitative variables determined the positive correlation between the length and width of colpi in equatorial and polar view with polar axis and equatorial diameter and number of spines between colpi with the number of spines per pollen. The number of spines per pollen was negatively correlated with the width and length of colpi in the polar view. Multiple sample analysis of variance (ANOVA) concluded that a high statistically significant difference exists among the means of analyzed traits. The examined qualitative and quantitative palynological traits revealed noticeable variations, thus providing the source for species discrimination in Asteraceous tribes.

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Foliar micromorphology with emphasis on the trichomes diversity and its taxonomic relevance in selected tribes of Asteraceae from Hainan Island

Cited by 5 publications

References 71 publications

Palynological and Foliar Epidermal Studies of Genus Oxalis Linnaeus, 1753 (Oxalidales, Oxalidaceae) From Egypt

Palynological and Foliar Epidermal Studies of Genus Oxalis Linnaeus, 1753 (Oxalidales, Oxalidaceae) From Egypt

Palyno-anatomical diversity and its implication in the taxonomy of some Plantaginaceae species

Systematic Implications of Palynomorph Diversity Using Microscopic Trends Among Asteraceous Flora From the Drylands of Baluchistan, Pakistan

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