RNA-based regulation beyond microRNAs: Emerging layers of post-transcriptional control in plants.
Rathod B, Puri S
Plant Signaling
When the basil on your windowsill wilts in afternoon heat and then rallies by morning, it is running a coordinated molecular response system scientists are only now beginning to fully map — and understanding it could explain why some varieties bounce back while others collapse, and how breeders might build that resilience in.
Every plant cell has a set of instructions written in DNA, but those instructions have to be read and converted into action — and plants have many more ways to control that reading process than we knew. Scientists have now catalogued at least six extra layers of molecular switches beyond the ones we've studied for decades, including looped RNA molecules, chemical tags on messengers, and tiny fragments recycled from the machinery that builds proteins. Crucially, these switches don't work alone — they form a web that lets plants fine-tune their response to drought, heat, and other stresses with remarkable precision.
Key Findings
Six distinct classes of non-microRNA RNA regulators have been identified in plants — including long non-coding RNAs, circular RNAs, tRNA-derived fragments, and epitranscriptomic chemical modifications — each influencing gene expression in distinct ways.
These regulatory layers operate as an interconnected network rather than isolated mechanisms, meaning disrupting one pathway can cascade through others, multiplying the complexity of plant gene control.
The framework offers concrete avenues for crop improvement under climate stress, suggesting that engineering or selecting for specific RNA regulatory profiles could enhance plant resilience without altering the underlying DNA sequence.
chevron_right Technical Summary
Plants regulate their own genes through a far richer toolkit than scientists previously appreciated — beyond the well-known microRNA switches, there are at least six additional molecular control systems that together form an integrated network governing how plants grow, respond to stress, and survive changing conditions. This review maps that network and argues it is the key to understanding plant resilience.
Abstract Preview
Plant gene expression is regulated by multilayered post-transcriptional mechanisms that extend beyond the well-characterized microRNA pathway. Although miRNAs play central roles in controlling mRNA...
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