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Type: Journal article
Title: Rice pollen aperture formation is regulated by the interplay between OsINP1 and OsDAF1
Author: Zhang, X.
Zhao, G.
Tan, Q.
Yuan, H.
Betts, N.
Zhu, L.
Zhang, D.
Liang, W.
Citation: Nature Plants, 2020; 6(4):394-403
Publisher: Nature Research (part of Springer Nature)
Issue Date: 2020
ISSN: 2055-026X
Statement of
Xu Zhang, Guochao Zhao, Qian Tan, Hui Yuan, Natalie Betts, Lu Zhu, Dabing Zhang and Wanqi Liang
Abstract: The aperture on the pollen surface provides an exit for the emerging pollen tube. Apertures exhibit huge morphological variation across plant species-grasses, including rice, possess a complex aperture consisting of an annulus and an operculum-but little is known about how this species-specific cell-surface pattern forms. Here, we report a lectin receptor-like kinase in Oryza sativa, OsDAF1, which is essential for annulus formation and thus for fertility. OsDAF1 is evenly distributed in early microsporocytes but localizes to the distal pre-aperture site at the tetrad stage. We further reveal that the rice orthologue of a key aperture factor in Arabidopsis, OsINP1, has conserved and diversified roles in rice aperture formation. Disruption of OsINP1 prevents formation of the aperture, precluding pollen-tube germination. Furthermore, our results demonstrate that OsINP1 is required for polarization of OsDAF1 via direct protein interaction, suggesting that OsINP1 has an additional role in the formation of annulus that is absent in Arabidopsis. Our study reveals the importance of the aperture for rice grain yield and reveals mechanisms controlling pollen aperture development in cereal species.
Keywords: Arabidopsis; Pollen; Protein-Serine-Threonine Kinases; Plant Lectins; Plant Proteins; Pollen Tube; Oryza
Description: Published online: 13 April 2020
Rights: © The Author(s), under exclusive licence to Springer Nature Limited 2020
RMID: 1000018811
DOI: 10.1038/s41477-020-0630-6
Appears in Collections:Agriculture, Food and Wine publications

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