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<p>Convolvulaceae is cosmopolitan plant family, consist of herbs, shrubs and vines. Globally, It is abundant widely distributed in America and Asia and widely distributed across tropical and temperate regions. About 30 genera of Convolvulaceae occurs in Pakistan including both natives and cultivated. The current study evaluates the pollen micromorphology of seven species of <i>ipomoea</i> belonging to Convolvulaceae. The aims of the study is to examine the pollen micromorphological variation among selected species of <i>Ipomoea</i> and to evaluate the taxonomic significance of these traits in species differentiation. For presented study, pollen samples were collected from their natural habitat and using standard palynological techniques their Micro-morphological attributes were examined under LM &amp; SEM. Both qualitative and quantitative characters were examined including polar and equatorial diameter, pollen size, exine thickness, spine characteristics, and pollen unit, aperture type, symmetry, and exine ornamentation. All the studied species of ipomoea exhibit monad pollen unit, radially symmetrical and found to be Isopolar with echinate and perforate exine pattern. In quantitative characters, interspecific variations were noted. <i>I. quamoclit</i> displayed largest pollen grains (110&#xa0;μm) and observed with maximum polar diameter (55.45&#xa0;μm) while <i>I. cairica</i> exhibit smallest pollen size (40&#xa0;μm). Maximum spine length was recorded in <i>I. purpurea</i> (4.25&#xa0;μm) while minimum in <i>I. triloba</i> (1.95&#xa0;μm). Exine thickness ranged from 3.55&#xa0;μm (<i>I. cairica</i>) to 1.45&#xa0;μm (<i>I. pes-tigridis</i>). These micromorphological variations highlight taxonomic distinguishing among taxa that are similar at macroscopic level. The outcomes underscore palynological studies as a powerful tool in identifying closely related <i>Ipomoea</i> species and attributes in species level distinguishing.</p>

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Pollen micromorphological variations in selected species of genus Ipomoea (Convolvulaceae) and their taxonomic significance

  • 期刊论文

  • 发表日期：

    2026年6月19日

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  • Aleena Gul,
  • Muhammad Zafar,
  • Salman Majeed,
  • Muhammad Rizwan Khan,
  • Samah A. Alharbi,
  • Sayyara Ibadullayeva,
  • Shomaila Ashfaq,
  • Khuzin Dinislam,
  • Adnan Amin,
  • Samira Khudaverdiyeva

摘要

Convolvulaceae is cosmopolitan plant family, consist of herbs, shrubs and vines. Globally, It is abundant widely distributed in America and Asia and widely distributed across tropical and temperate regions. About 30 genera of Convolvulaceae occurs in Pakistan including both natives and cultivated. The current study evaluates the pollen micromorphology of seven species of ipomoea belonging to Convolvulaceae. The aims of the study is to examine the pollen micromorphological variation among selected species of Ipomoea and to evaluate the taxonomic significance of these traits in species differentiation. For presented study, pollen samples were collected from their natural habitat and using standard palynological techniques their Micro-morphological attributes were examined under LM & SEM. Both qualitative and quantitative characters were examined including polar and equatorial diameter, pollen size, exine thickness, spine characteristics, and pollen unit, aperture type, symmetry, and exine ornamentation. All the studied species of ipomoea exhibit monad pollen unit, radially symmetrical and found to be Isopolar with echinate and perforate exine pattern. In quantitative characters, interspecific variations were noted. I. quamoclit displayed largest pollen grains (110 μm) and observed with maximum polar diameter (55.45 μm) while I. cairica exhibit smallest pollen size (40 μm). Maximum spine length was recorded in I. purpurea (4.25 μm) while minimum in I. triloba (1.95 μm). Exine thickness ranged from 3.55 μm (I. cairica) to 1.45 μm (I. pes-tigridis). These micromorphological variations highlight taxonomic distinguishing among taxa that are similar at macroscopic level. The outcomes underscore palynological studies as a powerful tool in identifying closely related Ipomoea species and attributes in species level distinguishing.