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Abstract Detail

Evolutionary Developmental Biology (Evo-Devo)

HALL, JOCELYN C [1], Carey, Shane [2], Mendler, Kerrin [2], Singh, Navjot [2].

Investigating the evolution and genetic basis of jointed fruits in the Brassiceae (Brassicaceae).

Fruits of Brassicaceae represent an ideal system to investigate the evolution of novel, ecologically important traits. The remarkable morphological variation seen likely impacts seed dispersal. Members of the tribe Brassiceae have a unique fruit type in the family, where the fruits are laterally segmented by a novel structure referred to as the joint. This segmentation, known as heteroarthrocarpy, is accompanied by variable dehiscence in the proximal segments. Further, indehiscence of proximal segment is often correlated with two segments abscising (separating) at maturity. Here we continue our investigations of Erucaria erucarioides and Cakile lanceolata, closely-related species which vary both in proximal dehiscence and joint abscission. Thus, we can make both within fruit and between species comparisons. We build on previous comparative gene expression studies by comparing RNA-seq data obtained from three regions of young fruits: proximal, joint, and distal. These data are complemented by qRT-PCR expression profiles at multiple developmental stages. Analyses suggest that the joint has a significantly different gene expression profile, especially when compared to the proximal segment. These data shed light on how differential expression of fruit patterning genes in these taxa may lead to variable morphologies and dispersal capabilities.

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1 - University Of Alberta, Harvard University Herbaria, CW 405 Biological Sciences Building, Edmonton, AB, T6G 2E9, Canada
2 - University of Alberta, CW 405 Biological Sciences Building, Edmonton, Alberta, T6G2E9, Canada


Presentation Type: Oral Paper
Session: 34, Evo-Devo
Location: Sundance 2/Omni Hotel
Date: Wednesday, June 28th, 2017
Time: 8:45 AM
Number: 34004
Abstract ID:323
Candidate for Awards:None

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