Expression of Genes from Paternal Alleles in Rice Zygotes and Involvement of OsASGR-BBML1 in Initiation of Zygotic Development

Plant & Cell Physiology
Md Hassanur RahmanTakashi Okamoto

Abstract

Upon fertilization in angiosperms, one sperm cell fuses with the egg cell to produce a zygote, and, via karyogamy, the parental genetic information is combined to form the diploid zygotic genome. Recently, analyses with parentally imbalanced rice zygotes indicated that parental genomes are utilized synergistically in zygotes with different functions, and that genes transcribed from the paternal or maternal allele might play important roles in zygotic development. Herein, we first conducted single nucleotide polymorphism-based mRNA-sequencing using intersubspecific rice zygotes. Twenty-three genes, with paternal allele-specific expression in zygotes, were identified, and, surprisingly, their allele dependencies in the globular-like embryo tended to be biallelic. This suggests that the paternal-dependent expression of these genes is temporary, occurring during the early stages of zygote development. Of the 23 genes, we focused on Oryza sativa Apospory-specific Genome Region (ASGR)-BABY-BOOM LIKE (BBML) 1 (OsASGR-BBML1), presumed to encode an AP2-transcription factor, due to its reported role in zygotic development. Interestingly, ectopic expression of OsASGR-BBML1 in egg cells induced nuclear and cell divisions, indicating that e...Continue Reading

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Citations

May 12, 2019·Plant & Cell Physiology·Yukinosuke OhnishiTakashi Okamoto
Jul 9, 2020·Frontiers in Plant Science·Yukinosuke Ohnishi, Tomokazu Kawashima
Oct 29, 2020·Communications Biology·Yujiro HonmaRyushiro D Kasahara
Jan 11, 2021·Current Opinion in Plant Biology·Imtiyaz Khanday, Venkatesan Sundaresan
Jan 25, 2020·Trends in Genetics : TIG·Peggy Ozias-Akins, Joann A Conner
Feb 20, 2021·Annual Review of Plant Biology·Thomas Dresselhaus, Gerd Jürgens
Jan 14, 2021·Plant & Cell Physiology·K Nakajima
Nov 16, 2019·Current Opinion in Plant Biology·Kai WangMartin Bayer
Sep 20, 2021·The Plant Journal : for Cell and Molecular Biology·Kasidit RattanawongTakashi Okamoto

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