Degeneration of photosynthetic capacity in mixotrophic plants, Chimaphila japonica and Pyrola decorata (Ericaceae).

	Degeneration of photosynthetic capacity in mixotrophic plants, Chimaphila japonica and Pyrola decorata (Ericaceae).
	Yu, Jiaojun; Wang, Chaobo; Gong, Xun
	2017
Source Publication	Plant diversity
ISSN	2468-2659
Volume	39 Issue:2 Pages:80-88
Abstract	The evolution of photosynthesis is an important feature of mixotrophic plants. Previous inferences proposed that mixotrophic taxa tend to retain most genes relating to photosynthetic functions but vary in plastid gene content. However, no sequence data are available to test this hypothesis in Ericaceae. To investigate changes in plastid genomes that may result from a transition from autotrophy to mixotrophy, the plastomes of two mixotrophic plants, Pyrola decorata and Chimaphila japonica, were sequenced at Illumina's Genome Analyzer and compared to the published plastome of the autotrophic plant Rhododendron simsii, which also belongs to Ericaceae. The greatest discrepancy between mixotrophic and autotrophic plants was that ndh genes for both P. decorata and C. japonica plastomes have nearly all become pseudogenes. P. decorata and C. japonica also retained all genes directly involved in photosynthesis under strong selection. The calculated rate of nonsynonymous nucleotide substitutions and synonymous substitutions of protein-coding genes (dN/dS) showed that substitution rates in shade plants were apparently higher than those in sunlight plants. The two mixotrophic plastomes were generally very similar to that of non-parasitic plants, although ndh genes were largely pseudogenized. Photosynthesis genes under strong selection were retained in the two mixotrophs, however, with greatly increased substitution rates. Further research is needed to gain a clearer understanding of the evolution of autotrophy and mixotrophy in Ericaceae.
Document Type	期刊论文
Identifier	http://ir.kib.ac.cn/handle/151853/64854
Collection	植物化学与西部植物资源持续利用国家重点实验室
Recommended Citation GB/T 7714	Yu, Jiaojun,Wang, Chaobo,Gong, Xun. Degeneration of photosynthetic capacity in mixotrophic plants, Chimaphila japonica and Pyrola decorata (Ericaceae).[J]. Plant diversity,2017,39(2):80-88.
APA	Yu, Jiaojun,Wang, Chaobo,&Gong, Xun.(2017).Degeneration of photosynthetic capacity in mixotrophic plants, Chimaphila japonica and Pyrola decorata (Ericaceae)..Plant diversity,39(2),80-88.
MLA	Yu, Jiaojun,et al."Degeneration of photosynthetic capacity in mixotrophic plants, Chimaphila japonica and Pyrola decorata (Ericaceae).".Plant diversity 39.2(2017):80-88.

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