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Abstract Detail

Development and Structure

Edwards, Molly B. [1], Ballerini, Evangeline S. [2], Kramer, Elena M. [3].

A developmental a transcriptional framework for pollinator-driven evolutionary transitions in petal spur morphology in Aquilegia (columbine).

The petals of Aquilegia (columbine) form elongated, three-dimensional nectar spurs that vary in length, shape, color, and nectar composition depending on their pollinators (bee, hummingbird, or hawkmoth). In the genus, the bee pollination syndrome is ancestral, and there have been multiple independent transitions from bee to hummingbird, and hummingbird to hawkmoth syndromes. The transition from bee to hummingbird pollination is of particular interest from a developmental perspective because petal morphology shifted dramatically from short, curved nectar spurs to long straight ones to accommodate the hummingbird beak. We present a framework that describes the cellular processes during development that are responsible for generating these contrasting spur morphologies, and examines their conservation across the two independent transitions to hummingbird pollination in the genus. We complement this developmental study with a transcriptional characterization of the petals of A. brevistyla and A. canadensis, the only pair of sister species in the genus with bee and hummingbird pollination, respectively.

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1 - Harvard University, Biolabs Room 1119, 16 Divinity Ave, Cambridge, MA, 02138, United States
2 - CSU Sacramento, Biology, 6000 J St., Sacramento, CA, 95819, United States
3 - Harvard Univ., OEB, 16 Divinity Avenue, BL 1119, Cambridge, MA, 02138, United States

none specified

Presentation Type: Oral Paper
Session: DS1, Development and Structure I
Location: /
Date: Tuesday, July 20th, 2021
Time: 2:00 PM(EDT)
Number: DS1016
Abstract ID:195
Candidate for Awards:Katherine Esau Award,Developmental and Structural Section Graduate Student Registration Award

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