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Article

Gene Losses and Plastome Degradation in the Hemiparasitic Species Plicosepalus acaciae and Plicosepalus curviflorus: Comparative Analyses and Phylogenetic Relationships among Santalales Members

1
Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah 24381, Saudi Arabia
2
Department of Biology, Faculty of Science, Taif University, Taif 21974, Saudi Arabia
3
Department of Biology, College of Sciences, King Khalid University, Abha 61421, Saudi Arabia
4
Prince Sultan Bin-Abdul-Aziz Center for Environment and Tourism Studies and Researches, King Khalid University, Abha 61421, Saudi Arabia
*
Author to whom correspondence should be addressed.
Academic Editors: Cássio Van den Berg and Baohong Zhang
Plants 2022, 11(14), 1869; https://doi.org/10.3390/plants11141869
Received: 23 April 2022 / Revised: 18 June 2022 / Accepted: 7 July 2022 / Published: 18 July 2022
(This article belongs to the Special Issue 10th Anniversary of Plants—Recent Advances and Perspectives)
The Plicosepalus genus includes hemiparasitic mistletoe and belongs to the Loranthaceae family, and it has several medicinal uses. In the present study, we sequenced the complete plastomes of two species, Plicosepalus acaciae and Plicosepalus curviflorus, and compared them with the plastomes of photosynthetic species (hemiparasites) and nonphotosynthetic species (holoparasites) in the order Santalales. The complete chloroplast genomes of P. acaciae and P. curviflorus are circular molecules with lengths of 120,181 bp and 121,086 bp, respectively, containing 106 and 108 genes and 63 protein-coding genes, including 25 tRNA and 4 rRNA genes for each species. We observed a reduction in the genome size of P. acaciae and P. curviflorus and the loss of certain genes, although this reduction was less than that in the hemiparasite and holoparasitic cp genomes of the Santalales order. Phylogenetic analysis supported the taxonomic state of P. acaciae and P. curviflorus as members of the family Loranthaceae and tribe Lorantheae; however, the taxonomic status of certain tribes of Loranthaceae must be reconsidered and the species that belong to it must be verified. Furthermore, available chloroplast genome data of parasitic plants could help to strengthen efforts in weed management and encourage biotechnology research to improve host resistance. View Full-Text
Keywords: plastome; Plicosepalus acaciae; Plicosepalus curviflorus; loranthaceae; mistletoe; phylogenetic relationship; plastome structure; comparative analysis plastome; Plicosepalus acaciae; Plicosepalus curviflorus; loranthaceae; mistletoe; phylogenetic relationship; plastome structure; comparative analysis
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MDPI and ACS Style

AL-Juhani, W.; Al Thagafi, N.T.; Al-Qthanin, R.N. Gene Losses and Plastome Degradation in the Hemiparasitic Species Plicosepalus acaciae and Plicosepalus curviflorus: Comparative Analyses and Phylogenetic Relationships among Santalales Members. Plants 2022, 11, 1869. https://doi.org/10.3390/plants11141869

AMA Style

AL-Juhani W, Al Thagafi NT, Al-Qthanin RN. Gene Losses and Plastome Degradation in the Hemiparasitic Species Plicosepalus acaciae and Plicosepalus curviflorus: Comparative Analyses and Phylogenetic Relationships among Santalales Members. Plants. 2022; 11(14):1869. https://doi.org/10.3390/plants11141869

Chicago/Turabian Style

AL-Juhani, Widad, Noha T. Al Thagafi, and Rahmah N. Al-Qthanin. 2022. "Gene Losses and Plastome Degradation in the Hemiparasitic Species Plicosepalus acaciae and Plicosepalus curviflorus: Comparative Analyses and Phylogenetic Relationships among Santalales Members" Plants 11, no. 14: 1869. https://doi.org/10.3390/plants11141869

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