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Updated: May 21, 2025

Quantification of Fungal Colonization, Sporogenesis, and Production of Mycotoxins Using Kernel Bioassays

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Published on: April 23, 2012

In a nutshell: pistachio genome and kernel development.

Jaclyn A Adaskaveg¹, Chaehee Lee¹, Yiduo Wei¹

¹Department of Plant Sciences, University of California, Davis, CA, 95616, USA.

The New Phytologist

|March 19, 2025

Summary

This summary is machine-generated.

Researchers mapped the pistachio genome and analyzed nut development, identifying key genes for oil accumulation. This provides crucial resources for improving this sustainable and nutritious crop.

Keywords:

Kerman Pistacia vera chromosome‐scale assembly kernel metabolic profile nut development nut physiology pistachio reference genome spatiotemporal transcriptome tree crop

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Area of Science:

Plant Genomics
Nutritional Biochemistry
Sustainable Agriculture

Background:

Pistachio (Pistacia vera) is a climate-resilient nut crop with high nutritional value.
Limited genomic and molecular data hinder understanding of pistachio nut development and nutritional traits.
Advancing pistachio requires a reference genome and detailed developmental studies.

Purpose of the Study:

To generate a chromosome-scale reference genome for Pistacia vera 'Kerman'.
To investigate the spatiotemporal molecular processes of pistachio nut development.
To identify genes and pathways regulating nutritional quality, particularly oil accumulation in kernels.

Main Methods:

Generated a chromosome-scale reference genome assembly.
Conducted spatiotemporal transcriptomic analysis across 14 developmental time points (hull, shell, kernel).
Integrated transcriptomic data with physiological data from three growing seasons.

Main Results:

Defined four distinct stages of pistachio nut growth and maturation.
Identified transcriptional and metabolic shifts in kernel development related to nutritional quality.
Discovered candidate regulatory genes (e.g., PvAP2-WRI1, PvNFYB-LEC1) involved in unsaturated fatty acid accumulation.

Conclusions:

The generated genome and developmental data provide essential resources for pistachio improvement.
Key genes regulating oil accumulation offer targets for enhancing pistachio's nutritional value and shelf life.
This study advances understanding of hard-shelled fruit development and benefits other woody crops.