Researchers report that CmDREBa plays a central role in how chrysanthemum responds to long periods of cold, offering a molecular explanation for the plant’s perennial growth habit. The study, highlighted by Nature and linked to work from China Agricultural University, focuses on how seasonal chilling helps the plant endure winter.
According to the study summary, CmDREBa acts like a master switch under prolonged low temperatures. When conditions stay cold, it suppresses both stem growth and flowering. That slowdown is important for perennial survival, because reduced growth helps plants conserve resources during winter.
The same regulator appears to reverse its effect when temperatures rise. As warmer conditions return, the block on stem development and flowering is lifted, allowing chrysanthemum to resume active growth. This cold-to-warm transition helps explain how the species coordinates winter survival with spring recovery.
The findings add to understanding of how temperature signals shape plant development in ornamental perennials. In chrysanthemum, the work points to CmDREBa as a key link between prolonged chilling and the seasonal switch between dormancy-like growth suppression and renewed growth.
