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Open AccessArticle

Evolutionary Analysis of Calcium-Dependent Protein Kinase in Five Asteraceae Species

by Liping Zhu 1,2,†, Bowen Zheng 1,2,†, Wangyang Song 1,2, Hongbin Li 1,* and Xiang Jin 1,2,*
1
Ministry of Education Key Laboratory for Ecology of Tropical Islands, College of Life Sciences, Hainan Normal University, Haikou 571158, China
2
Key Laboratory of Xinjiang Phytomedicine Resource and Utilization of Ministry of Education, College of Life Sciences, Shihezi University, Shihezi 832003, China
*
Authors to whom correspondence should be addressed.
These authors contribute equally to this work.
Plants 2020, 9(1), 32; https://doi.org/10.3390/plants9010032
Received: 5 November 2019 / Revised: 17 December 2019 / Accepted: 21 December 2019 / Published: 24 December 2019
(This article belongs to the Special Issue Plant Molecular Phylogenetics and Evolutionary Genomics)
Calcium-dependent protein kinase (CPK) is crucial in Ca2+ signal transduction, and is a large gene family in plants. In our previous work, we reported Hevea brasiliensis CPKs were important for natural rubber biosynthesis. However, this CPK gene family in other rubber producing plants has not been investigated. Here, we report the CPKs in five representative Asteraceae species, including three rubber-producing and two non-rubber species. A total of 34, 34, 40, 34 and 30 CPKs were identified from Taraxacum koksaghyz, Lactuca sativa, Helianthus annuus, Chrysanthemum nankingense and Cynara cardunculus, respectively. All CPKs were classified into four individual groups (group I to IV). In addition, 10 TkCPKs, 11 LsCPKs, 20 HaCPKs, 13 CnCPKs and 7 CcCPKs duplicated paralogs were identified. Further evolutionary analysis showed that, compared to other subfamilies, the group III had been expanded in the Asteraceae species, especially in the rubber-producing species. Meanwhile, the CPKs in group III from Asteraceae species tend to expand with low calcium binding capacity. This study provides a systematical evolutionary investigation of the CPKs in five representative Asteraceae species, suggesting that the sub-family specific expansion of CPKs might be related to natural rubber producing. View Full-Text
Keywords: calcium-dependent protein kinases; natural rubber producing; evolutionary analysis; Asteraceae; gene family expansion calcium-dependent protein kinases; natural rubber producing; evolutionary analysis; Asteraceae; gene family expansion
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Zhu, L.; Zheng, B.; Song, W.; Li, H.; Jin, X. Evolutionary Analysis of Calcium-Dependent Protein Kinase in Five Asteraceae Species. Plants 2020, 9, 32.

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