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A staging framework to study rice female gametophyte development.

Taehoon Kim¹, Divya Rana¹, Isabel Ocampo-Quiceno¹

¹Microbiology and Cell Science Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, 32611, USA.

Plant Reproduction

|January 14, 2026

Summary

This summary is machine-generated.

Researchers developed a new staging method for rice female gametophyte (FG) development using pistil length. This framework precisely defines six developmental stages, aiding molecular studies crucial for crop yield.

Keywords:

Embryo sac Female gametophyte development Meiosis Mitosis Pistil length-based staging Rice

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Area of Science:

Plant Biology
Developmental Biology
Reproductive Biology

Background:

Female gametophyte (FG) development is crucial for plant reproduction, impacting fertilization and seed development.
Accurate staging of FG development is needed to study molecular dynamics, especially in rice (Oryza sativa), a vital food crop.
Current methods lack the precision required for detailed molecular investigations of FG development.

Purpose of the Study:

To establish a precise and robust staging framework for rice ovule and FG development.
To enable detailed molecular analyses of temporally regulated events during FG development.
To provide a tool for understanding FG development's role in cereal crop yield.

Main Methods:

Development of a pistil length-based staging framework for rice ovules.
Systematic analysis of FG developmental progress using morphological parameters.
Validation of the staging method through transcriptional expression of developmental marker genes.

Main Results:

Identification of six morphologically distinct developmental stages of FG development in rice.
Demonstration of the framework's accuracy in defining developmental progression.
Successful correlation of developmental stages with temporally regulated gene expression.

Conclusions:

The proposed pistil length-based staging framework offers a systematic and accurate method for studying rice FG development.
This framework facilitates research into the molecular mechanisms underlying FG development, including transcriptional, epigenetic, and metabolic regulation.
The findings are significant for improving our understanding of reproductive processes in cereal crops and enhancing food security.