Cold-activated peptide protects crop pollen and yield, Nature study finds
A Nature study shows boosting two cold-induced peptides cut cold-stress yield loss up to 52% in tomato and 18.3% in rice.
Photo by Tom Fisk on Pexels
Researchers in China have found a molecular switch that helps plants protect their pollen from sudden cold, pointing to a route toward climate-smart crops that hold their yield when a cold snap hits the flowering stage. The study, “Cold-induced peptide signalling secures pollen resilience and crop yield”, was published in the journal “Nature” on 3 June 2026 by S. Chen, Y. Zou, H. Cui and colleagues at the Institute of Genetics and Developmental Biology of the Chinese Academy of Sciences and China Agricultural University in Beijing.
In tests, switching up two cold-responsive peptides prevented cold-induced yield loss by up to 52% in tomato and recovered 18.3% of lost grain yield in rice. The peptides stay quiet under normal conditions and act only when the plant is chilled, a feature the authors describe as on-demand resilience.
How cold stress aborts pollen — and how the peptides stop it
Cold weather during flowering is a leading cause of crop yield loss because it kills developing pollen, leaving plants unable to set fruit or grain. The team traced this failure to a breakdown in the timing of cell death in the tapetum, the inner layer of anther cells that feeds developing pollen and must itself break down on schedule for pollen to mature. Cold delays that programmed cell death, and the pollen fails.
Working in tomato, the researchers identified two small signalling peptides in the RGF–GLV–CLEL family, named SlRGF9 and SlRGF10, that the plant produces only under cold. Plants engineered to lose both peptides grew normally in warm conditions but aborted their pollen after chilling. The peptides are read by a cell-surface receptor complex — the receptor kinase SlRGFR6 together with SlSERK co-receptors — which triggers a calcium influx through the channels SlCNGC16/18. That calcium signal keeps the tapetum’s cell-death programme on time, so pollen can develop despite the cold.
The pathway and its measured effects are summarised below.
| Element | Detail |
|---|---|
| Cold-induced peptides identified | SlRGF9 and SlRGF10 (RGF–GLV–CLEL family) |
| Receptor complex | SlRGFR6 with SlSERK co-receptors (cell-surface kinases) |
| Downstream signal | Calcium influx through SlCNGC16/18 channels |
| Process protected | Tapetum cell-death timing; microspore (pollen) development |
| Loss-of-function effect (tomato) | Normal when warm; pollen abortion after cold |
| Tomato, peptides upregulated | Cold-induced yield loss prevented by up to 52% |
| Rice, homologues upregulated | 18.3% of grain-yield loss recovered |
| Conservation | Across dicots (tomato) and monocots (rice) |
Source: Chen et al., “Nature”, 3 June 2026.
Toward climate-smart crops that resist cold
The practical step the authors tested was to raise the plants’ own production of the peptides. Tomato plants engineered to make more SlRGF9 and SlRGF10 prevented up to 52% of the yield loss that cold otherwise caused. Because the same signalling family exists across very different plants, the team checked whether the trick carries over: raising RGF peptide levels in rice, a distant relative, recovered 18.3% of the grain yield that cold would have destroyed. The pathway, the paper reports, is conserved across both dicots and monocots — the two broad branches of flowering plants — which is what makes it a candidate for wider use in staple crops.
The institute has filed patent applications covering the gene application and the peptide-detection method, an early sign the group intends to move the finding toward breeding programmes. The work remains at the proof-of-concept stage: the headline gains come from engineered plants grown under controlled cold treatments, not from field trials across seasons and soils, and the paper does not report results in other staple crops such as wheat or maize. Protecting yield in the field is only part of food security; reducing what is lost after harvest matters too, as Winss Solutions sets out in its ten tips to prevent food waste. Controlled-environment approaches that sidestep the weather entirely, such as soil-free farming methods like hydroponics, tackle the same problem from a different direction.
Background: cold stress and crop resilience
Cold snaps during the flowering window have long been recognised as a costly threat to harvests, and climate change is making such extreme weather events more frequent and harder to predict, the study notes. Plant scientists have spent years mapping how cold disrupts pollen, but the signalling pathways that let some plants stay fertile in the cold were unknown. Small signalling peptides — short chains of amino acids that plants use to coordinate growth and stress responses — have become a major focus of plant biology over the past two decades. The Institute of Genetics and Developmental Biology, part of the Chinese Academy of Sciences in Beijing, runs State Key Laboratories in seed innovation and plant science and works on the genetics of staple crops. By pinpointing the SlRGF–SlRGFR6 axis as a master control for pollen resilience, the team has turned a long-standing problem in crop physiology into a specific, testable target for engineering cold-tolerant varieties.
Sources: Nature; Nature (Research Briefing)
Featured image: photo by Tom Fisk on Pexels (free Pexels license).
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I specialize in sustainability education, curriculum co-creation, and early-stage project strategy. At WINSS, I craft articles on sustainability, transformative AI, and related topics. When I’m not writing, you’ll find me chasing the perfect sushi roll, exploring cities around the globe, or unwinding with my dog Puffy — the world’s most loyal sidekick.
