Brassinosteroids regulate petal spur length in Aquilegia by controlling cell elongation.

ABSTRACT:

Background and aims

Aquilegia produce elongated, three-dimensional petal spurs that fill with nectar to attract pollinators. Previous studies have shown that the diversity of spur length across the Aquilegia genus is a key innovation that is tightly linked with its recent and rapid diversification into new ranges, and that evolution of increased spur lengths is achieved via anisotropic cell elongation. Previous work identified a brassinosteroid response transcription factor as being enriched in the early developing spur cup. Brassinosteroids are known to be important for cell elongation, suggesting that brassinosteroid-mediated response may be an important regulator of spur elongation and potentially a driver of spur length diversity in Aquilegia. In this study, we investigated the

SUBMITTER: Conway SJ 

PROVIDER: S-EPMC8577200 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature