Primary metabolic processes as drivers of leaf ageing

Area of Science:

• Plant Biology
• Molecular Biology
• Systems Biology

Background:

• Plant ageing is a complex, coordinated process from birth to death.
• Autumn colours in deciduous trees exemplify leaf senescence.
• Multi-omics approaches have advanced the study of plant ageing.

Purpose of the Study:

• To review multi-omics studies on plant ageing.
• To investigate the role of basic metabolic processes in driving ageing.
• To integrate systems biology findings with molecular genetic evidence.

Main Methods:

• Review of multi-omics studies (e.g., chlorophyll, amino acids, sugars, DNA, reactive oxygen species metabolism).
• Analysis of molecular genetic evidence (gene knock-outs, ectopic expression).
• Development of a model summarizing core cellular processes in leaf ageing.

Main Results:

• Multi-omics studies strongly support metabolic processes as drivers of plant ageing.
• Molecular genetic approaches largely confirm multi-omics hypotheses.
• Limited evidence suggests chlorophyll and DNA metabolism are key drivers of leaf ageing.

Conclusions:

• Core cellular metabolic processes are central to driving leaf ageing.
• Developmental processes are intrinsically linked with primary metabolism.
• This integration inevitably leads to plant ageing and death.