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Related Experiment Video

Updated: Jan 29, 2026

Determination of DNA Methylation of Imprinted Genes in Arabidopsis Endosperm

Determination of DNA Methylation of Imprinted Genes in Arabidopsis Endosperm

Published on: January 28, 2011

FLOURY ENDOSPERM 2 Coordinates Starch Biosynthesis to Maintain Endosperm Structural Integrity in Rice.

Hye-Mi Lee¹, Jin-Young Kim¹, Hak-Dong Kim¹

¹Division of Horticultural Biotechnology, Hankyong National University, Anseong 17579, Republic of Korea.

|January 28, 2026

Summary

This summary is machine-generated.

Loss of FLOURY ENDOSPERM 2 (FLO2) in rice significantly impacts flour properties and endosperm structure. This gene is crucial for maintaining starch organization and overall grain quality.

Keywords:

CRISPR/Cas9 FLOURY ENDOSPERM 2 (FLO2)amylopectin chain-length distribution flour pasting behavior rice endosperm starch physicochemical properties

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Published on: January 25, 2022

Area of Science:

Plant Biology
Molecular Genetics
Food Science

Background:

FLOURY ENDOSPERM 2 (FLO2) is implicated in rice endosperm development and starch quality.
The precise quantitative impact of FLO2 on flour physicochemical behavior and endosperm integrity remains undefined.

Purpose of the Study:

To investigate the role of FLO2 in rice by analyzing the effects of its loss of function on starch organization.
To quantitatively define how mutations in FLO2 alter the functional properties of rice flour and endosperm microstructure.

Main Methods:

Generated homozygous OsFLO2 knockout lines using CRISPR/Cas9 in japonica rice.
Assessed grain appearance, flour physicochemical properties (RVA, DSC), amylopectin chain-length distribution, and endosperm microstructure (SEM).

Main Results:

OsFLO2 mutants displayed floury, opaque endosperms with increased chalkiness (27-29%).
Significant reductions in peak viscosity and pasting temperature were observed, alongside altered amylopectin chain lengths and increased endosperm porosity.
Disrupted starch granule packing and a tendency toward reduced gelatinization enthalpy were noted in mutants.

Conclusions:

FLO2 is essential for maintaining rice endosperm structural integrity.
The gene plays a critical role in harmonizing amylopectin microstructure with starch thermal and gelatinization properties.
Understanding FLO2 function provides insights into improving rice flour quality and endosperm characteristics.