Integrative transcriptomics reveals genotypic impact on sugar beet storability.

Area of Science:

• Plant biology
• Agricultural science
• Molecular genetics

Background:

• Sugar beet is a vital global sugar crop, but sucrose loss during storage impacts the sugar industry.
• Extended storage is necessary due to centralized processing, yet molecular mechanisms of storage variability are unknown.

Purpose of the Study:

• To investigate the molecular basis of sucrose loss during storage in different sugar beet varieties.
• To identify genotype-specific genes and pathways associated with sugar beet storability.

Main Methods:

• Integrative comparative transcriptomics on six sugar beet varieties with varying storage performance.
• Analysis of gene expression, cell wall modifications, and gene co-expression networks.
• Morphological analysis of beet roots prior to and after storage.

Main Results:

• Well-storable varieties showed distinct pre-storage characteristics like more parenchyma cells and thinner periderm.
• Transcriptomics revealed significant gene expression changes in cell wall modification, defense response, carbohydrate metabolism, and phenylpropanoid pathways.
• Gene co-expression network analysis identified hub genes driving invert sugar accumulation and sucrose loss.

Conclusions:

• Genotype-specific genes and pathways are key drivers of sugar beet storability.
• Identified molecular markers can potentially improve pathogen resistance and storage properties of sugar beet.
• Understanding these mechanisms is crucial for optimizing sugar manufacturing and reducing economic losses.