The Kalanchoe genome provides insights into convergent evolution and building blocks of crassulacean acid metabolism



Yang, Xiaohan, Hu, Rongbin, Yin, Hengfu, Jenkins, Jerry, Shu, Shengqiang, Tang, Haibao, Liu, Degao, Weighill, Deborah A, Yim, Won Cheol, Ha, Jungmin
et al (show 39 more authors) (2017) The Kalanchoe genome provides insights into convergent evolution and building blocks of crassulacean acid metabolism. NATURE COMMUNICATIONS, 8.

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Abstract

Crassulacean acid metabolism (CAM) is a water-use efficient adaptation of photosynthesis that has evolved independently many times in diverse lineages of flowering plants. We hypothesize that convergent evolution of protein sequence and temporal gene expression underpins the independent emergences of CAM from C3 photosynthesis. To test this hypothesis, we generate a de novo genome assembly and genome-wide transcript expression data for Kalanchoë fedtschenkoi, an obligate CAM species within the core eudicots with a relatively small genome (~260 Mb). Our comparative analyses identify signatures of convergence in protein sequence and re-scheduling of diel transcript expression of genes involved in nocturnal CO2 fixation, stomatal movement, heat tolerance, circadian clock, and carbohydrate metabolism in K. fedtschenkoi and other CAM species in comparison with non-CAM species. These findings provide new insights into molecular convergence and building blocks of CAM and will facilitate CAM-into-C3 photosynthesis engineering to enhance water-use efficiency in crops.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 12 Dec 2017 16:17
Last Modified: 15 Oct 2021 02:10
DOI: 10.1038/s41467-017-01491-7
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3014033