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Degradation of detrimental microRNAs safeguards the fertilized egg cells to establish an ECS-dependent polytubey block in Arabidopsis.

Developmental cell - 11 Feb 2026

Shen Kun, Qu Mengxue, Zhou Xuemei, Guo Yingying, Zhong Yicheng, Sun Meng-Xiang, Zhao Peng

Abstract excerpt

Fertilization of the egg cell by more than one sperm cell results in aneuploidy and genomic dysfunction. To avoid this, flowering plants have intricate polytubey block mechanisms that prevent additional pollen tubes from entering the ovule. In one mechanism for blocking polytubey, the fertilized egg cell secretes the aspartic endopeptidases EGG CELL-SPECIFIC1 (ECS1) and ECS2, which degrade pollen tube...

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PMID: 41086814
DOI: 10.1016/j.devcel.2025.09.013

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 8 Sept 2026.

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