AI Insight
Researchers have discovered that the shape of plant sepals—the protective leaf-like structures covering flower buds—is determined by the growth direction of their inner and outer cell layers. When both cell layers grow in the same upward direction, sepals remain smooth and uniformly stiff, which provides optimal protection for developing flower buds. Misaligned growth between layers results in wrinkled or deformed sepals with reduced structural integrity.
Why it matters
This finding reveals fundamental principles of plant organ development and mechanical stability. Understanding these growth mechanics could help improve crop breeding programs by selecting for plants with stronger, more protective floral structures that better shield developing flowers from environmental stress and damage.
Understand the Science
When inner and outer cell layers of sepals—the leaf-like plant organs that cover and protect the flower bud before it opens—all grow upward, the organs stay smooth and uniformly stiff, which is optimal for the plant, according to a new study.
Source: Wrinkled or smooth? Cell growth mechanics determine shape of plant organs