Tiny protein signals quietly run plant growth, defense, and even leaf shedding
Torii KU
Plant Signaling
When a wounded tomato leaf in your garden ramps up its defenses, or a flower drops its petals on schedule, short peptide messages are doing the coordinating.
Plants use tiny protein messages to tell their cells when to grow, when to drop petals or leaves, how far apart to space breathing pores, and when to fight off a chewing insect. Scientists once thought plants didn't do this at all, but since the 1990s they've found hundreds of these signals and the receptors that catch them. That knowledge is now guiding efforts to breed plants that cope better with drought, heat, and disease.
Key Findings
Systemin and Phytosulfokine, discovered in the 1990s, overturned the idea that plants lack peptide-based signaling and launched a field now spanning many peptide families.
Five well-studied families (Systemin, PSK, IDA/IDA-LIKES, CLE, EPF/EPF-LIKES) show how peptide cleavage, chemical modification, and receptor-like kinase binding control growth, abscission, stem cell maintenance, and stomatal patterning.
Growing genomic resources and new technologies are expected to speed discovery and engineering of peptide pathways to improve plant resilience.
chevron_right Technical Summary
Plants talk to their own cells with small protein messengers called peptide hormones, and three decades of research show these signals steer growth, flowering parts falling off, leaf pore spacing, and defense against attackers. Understanding them could help breeders build tougher crops that handle stress and disease.
Abstract Preview
Original paper
Plant Peptide Hormones: Three Decades of Discovery and Emerging Paradigms.
Plant peptide hormones have reshaped our understanding of intercellular signaling in plants. Once considered absent in plants, peptide-based signaling pathways emerged as key regulators of plant gr...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Species Mentioned
Was this useful?
Want to tell us more? (optional)
Thanks for the note!
Something went wrong — please try again.
Too many submissions. Try again in an hour.
Targeted knockout of a host peroxisomal peptidase confers field resistance to...
The corn in your grocery store and the staple food keeping millions of East African families fed is under serious threat from a viral disease that can wipe o...
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...