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Abstract Detail



Molecular Ecology and Evolution

Jo, Sang-Jin [1], Kim, Ki-Joong [1].

Multiple independent plastid gene losses in the Burmannia (Burmanniaceae).

The gene contents and gene clusters of land plant plastomes are relatively well preserved because of the strong selective pressures of the photosynthetic activities. In contrast, the plastomes of nonphotosynthetic plants possesses strongly reduced gene contents and/or configured gene orders. The genus Burmannia (Burmanniaceae, monocots) is an excellent model system to understand the plstome evolution under the relaxed selective pressures because both the photosynthetic plants and the nonphotosynthetic parasites occur within a single genus. We reports the complete plastomes of three photosynthetic plants and three nonphotosynthetic parasites from Burmannia. All photosynthetic Burmannia possess normal genome sizes ranged from 154 kb to 156 kb. However, three nonphotosynthetic Burmannia possess markedly different sizes of plastomes; 107,771 bp, 85,868 bp, and 72,550 bp, respectively. Thirty-six genes are lost in the B. cryptotepala and 63 genes are lost in B. nepalensis. The majority of photosystem genes (pet, psa and psb), ndh genes, and RNA polymerase (rpo) genes are lost or turned into pseudogenes. The gene losses occurred independently along the three nonphotosynthetic lineages. Both of the large single copy (LSC) and the small single copy (SSC) regions are reduced extensively.


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1 - Korea University, Division of Life Sciences, Anamdong-5-1, Seungbuk-gu, Seoul, 136-701, Korea

Keywords:
chloroplast genome.

Presentation Type: Oral Paper:Papers for Topics
Session: 61
Location: Salon 15/16/The Shaw Conference Centre
Date: Wednesday, July 29th, 2015
Time: 8:15 AM
Number: 61002
Abstract ID:216
Candidate for Awards:None


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