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Related Experiment Video

Updated: Jun 12, 2026

Blastomere Explants to Test for Cell Fate Commitment During Embryonic Development

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Published on: January 26, 2013

XsMAX2 negatively regulates post-fertilization ovule development in Xanthoceras sorbifolium.

Qingyuan Zhou¹, Qing Cai¹, Linyi Zhou²

¹Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, 100093, China.

Plant Physiology and Biochemistry : PPB

|June 10, 2026

Summary

Xanthoceras sorbifolium MAX2 (XsMAX2) negatively regulates ovule development. Its expression, influenced by nutrients and hormones, controls fruit and ovule abortion, impacting plant reproductive success.

Keywords:

Fertilized ovules Nutrient availability Strigolactone Xanthoceras sorbifolium XsMAX2

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Dissection of Drosophila Ovaries

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Published on: October 19, 2006

Area of Science:

Plant Molecular Biology
Reproductive Biology
Genetics

Background:

The MAX2 gene, encoding an F-box protein, is crucial for plant development and stress responses.
Its role in post-fertilization ovule development is not well understood.
XsMAX2, a MAX2 homolog in Xanthoceras sorbifolium, is highly expressed in fertilized ovules.

Purpose of the Study:

To elucidate the function of XsMAX2 in post-fertilization ovule development in Xanthoceras sorbifolium.
To investigate the molecular mechanisms underlying XsMAX2 regulation and its impact on reproductive success.

Main Methods:

Identified XsMAX2 as a nuclear-localized protein interacting with SKP1.
Demonstrated ARF2 binding to the XsMAX2 promoter.
Analyzed the effects of XsMAX2 upregulation and downregulation on ovule development.
Investigated XsMAX2 expression modulation by nutrients and phytohormones.

Main Results:

XsMAX2 interacts with SKP1, a component of the SCF ubiquitin ligase complex.
ARF2 directly regulates XsMAX2 expression in fertilized ovules.
XsMAX2 upregulation causes ovule abortion, while downregulation promotes development.
XsMAX2 expression is sensitive to phosphate, sugars, strigolactone, and abscisic acid.

Conclusions:

XsMAX2 acts as a negative regulator of post-fertilization ovule development in X. sorbifolium.
XsMAX2 integrates environmental and hormonal signals to control seed development.
The study reveals a novel mechanism linking nutrient/hormone signaling to reproductive output via XsMAX2.