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Molecular Mechanism of Pollen and Pollen Tube Development

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Plant Sciences".

Deadline for manuscript submissions: closed (20 February 2025) | Viewed by 1996

Special Issue Editor


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Guest Editor
Department of Life Science and Environmental Biochemistry, Pusan National University, Miryang 50463, Republic of Korea
Interests: plant physiology; pollen tube growth; reproductive development

Special Issue Information

Dear Colleagues,

Flowering plants have evolved pollen tubes that deliver passive and immobile sperm cells into the maternal reproductive organ for double fertilization. This successful reproductive development includes anther and pollen development, pollen tube growth, pollen–pistil interaction, and double fertilization. Agriculturally, the fertilization of flowers directly determines crop yield, and the understanding of pollen development mechanisms contributes to the hybrid technology used for crop breeding. Because climate changes sensitively affect reproductive development, a greater understanding of the genes and environment is crucial.

Recently, omics data of gamete tissues and cells as well as the CRSIPR-Cas9 gene editing system have expanded our knowledge through a newly generated mutant gamete gene. We would like to invite you to contribute to this Special Issue by submitting a paper on any of the topics described above, either in the form of an original research article or review.

Prof. Dr. Yujin Kim
Guest Editor

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Keywords

  • plant physiology
  • pollen tube growth
  • reproductive development

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Published Papers (1 paper)

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Research

12 pages, 4550 KiB  
Article
EPAD1 Orthologs Play a Conserved Role in Pollen Exine Patterning
by Huanjun Li, Miaoyuan Hua, Naveed Tariq, Xian Li, Yushi Zhang, Dabing Zhang and Wanqi Liang
Int. J. Mol. Sci. 2024, 25(16), 8914; https://doi.org/10.3390/ijms25168914 - 16 Aug 2024
Viewed by 1213
Abstract
The pollen wall protects pollen during dispersal and is critical for pollination recognition. In the Poaceae family, the pollen exine stereostructure exhibits a high degree of conservation with similar patterns across species. However, there remains controversy regarding the conservation of key factors involved [...] Read more.
The pollen wall protects pollen during dispersal and is critical for pollination recognition. In the Poaceae family, the pollen exine stereostructure exhibits a high degree of conservation with similar patterns across species. However, there remains controversy regarding the conservation of key factors involved in its formation among various Poaceae species. EPAD1, as a gene specific to the Poaceae family, and its orthologous genes play a conserved role in pollen wall formation in wheat and rice. However, they do not appear to have significant functions in maize. To further confirm the conserved function of EPAD1 in Poaceae, we performed an analysis on four EPAD1 orthologs from two distinct sub-clades within the Poaceae family. The two functional redundant barley EPAD1 genes (HvEPAD1 and HvEPAD2) from the BOP clade, along with the single copy of sorghum (SbEPAD1) and millet (SiEPAD1) from the PACMAD clade were examined. The CRISPR-Cas9-generated mutants all exhibited defects in pollen wall formation, consistent with previous findings on EPAD1 in rice and wheat. Interestingly, in barley, hvepad2 single mutant also showed apical spikelets abortion, aligning with a decreased expression level of HvEPAD1 and HvEPAD2 from the apical to the bottom of the spike. Our finding provides evidence that EPAD1 orthologs contribute to Poaceae specific pollen exine pattern formation via maintaining primexine integrity despite potential variations in copy numbers across different species. Full article
(This article belongs to the Special Issue Molecular Mechanism of Pollen and Pollen Tube Development)
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