Asset Details
Do you wish to reserve the book?
Sporophyte-directed gametogenesis in Arabidopsis
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Sporophyte-directed gametogenesis in Arabidopsis
Do you wish to request the book?
Sporophyte-directed gametogenesis in Arabidopsis
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Sporophyte-directed gametogenesis in Arabidopsis
2025
Overview
Plants alternate between diploid sporophyte and haploid gametophyte generations
1
. In mosses, which retain features of ancestral land plants, the gametophyte is dominant and has an independent existence. However, in flowering plants the gametophyte has undergone evolutionary reduction to just a few cells enclosed within the sporophyte. The gametophyte is thought to retain genetic control of its development even after reduction
2
. Here we show that male gametophyte development in
Arabidopsis
, long considered to be autonomous, is also under genetic control of the sporophyte via a repressive mechanism that includes large-scale regulation of protein turnover. We identify an
Arabidopsis
gene
SHUKR
as an inhibitor of male gametic gene expression. SHUKR is unrelated to proteins of known function and acts sporophytically in meiosis to control gametophyte development by negatively regulating expression of a large set of genes specific to postmeiotic gametogenesis. This control emerged late in evolution as
SHUKR
homologues are found only in eudicots. We show that
SHUKR
is rapidly evolving under positive selection, suggesting that variation in control of protein turnover during male gametogenesis has played an important role in evolution within eudicots.
Ancestral land plants had a free-living gametophyte, but in flowering plants the gametophyte develops within the sporophyte. This study shows that male gametophyte development in
Arabidopsis
is directed by the sporophyte through repression of gametogenesis genes.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ Arabidopsis - growth & development
/ Arabidopsis Proteins - genetics
/ Arabidopsis Proteins - metabolism
/ Biomedical and Life Sciences
/ Diploids
/ Gametogenesis, Plant - genetics
/ Gene Expression Regulation, Plant
/ Genes
/ Germ Cells, Plant - growth & development
/ Letter
/ Males
/ Meiosis
/ Proteins
