CRISPR/Cas9-mediated disruption of the gamma carbonic anhydrase 2 gene leads to reduced mitochondrial complex I and growth alterations in tomato.
Valiñas MA, Cerrudo I, Marchetti F, Villarreal F, Pagnussat G
Crispr
Tomato seedlings on your windowsill are racing to germinate before their stored energy runs out — and this research reveals that the cellular machinery managing that energy sprint is wired directly into the hormones that control whether a seed wakes up at all.
Inside every plant cell, tiny power-generating structures called mitochondria need a specific protein to work properly. Researchers switched off the gene that makes this protein in tomatoes using a precise editing tool, and found the plants grew much more slowly and had trouble sprouting — even though their cells still made more energy-carrying molecules than expected. Strangely, tomatoes reacted very differently to this change than a common lab plant called Arabidopsis, showing that different plants have evolved their own ways of handling energy problems during early growth.
Key Findings
CRISPR knockout of SlγCA2 in tomato reduced mitochondrial Complex I levels and activity comparably to Arabidopsis mutants, yet caused delayed seed germination and retarded vegetative growth not seen in Arabidopsis.
SlγCA2-knockout tomato seeds showed increased ATP levels despite reduced oxygen consumption, suggesting a metabolic compensation mechanism unique to tomato.
Disruption of SlγCA2 altered abscisic acid and gibberellin hormone homeostasis, linking mitochondrial electron transport chain function directly to developmental hormone regulation in tomato.
chevron_right Technical Summary
Scientists used CRISPR gene editing to disable a key mitochondrial gene in tomatoes, discovering that tomato plants respond very differently than the model plant Arabidopsis — showing slower germination, stunted growth, and disrupted hormone levels, revealing that energy production and plant development are more tightly linked than previously thought.
Abstract Preview
Despite similar complex I reduction, γCA2 disruption in tomato, unlike in arabidopsis, triggers hormonal and developmental changes, challenging assumptions of conserved mitochondrial responses acro...
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The tomato is a plant whose fruit is an edible berry that is eaten as a vegetable. The tomato is a member of the nightshade family that includes tobacco, potato, and chili peppers. It originated from western South America, and may have been domesticated there, in Mexico, or in Central America. Th...