Metabolic changes during wheat microspore embryogenesis induction using the highly responsive cultivar Svilena.

Area of Science:

• Plant Science
• Molecular Biology
• Biochemistry

Background:

• Microspore embryogenesis offers a rapid route to homozygosity in plant breeding.
• Understanding metabolic shifts is crucial for optimizing haploid induction in wheat (Triticum aestivum).

Purpose of the Study:

• To integrate metabolomic and transcriptomic data during early microspore embryogenesis in Triticum aestivum.
• To identify key metabolic pathways and regulatory mechanisms driving microspore dedifferentiation.

Main Methods:

• Comparative analysis of primary metabolites and gene expression profiles at three distinct developmental time points.
• Utilizing an integrative -omics approach for microspore embryogenesis in Triticum aestivum.

Main Results:

• Energy for microspore dedifferentiation during pre-treatment originates from the tricarboxylic acid (TCA) cycle and starch degradation.
• Amino acid metabolism is highly active, with TCA cycle intermediates in high demand.
• Starch accumulation resumes post-nuclear division; glutamine synthetase abundance correlates with glutamine levels.

Conclusions:

• Energy production is a critical component of the low-temperature-induced dedifferentiation process in microspores.
• Active amino acid metabolism supports early microspore development, with specific isoforms of glutamine synthetase playing key roles post-division.