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The complete chloroplast genome of a mangrove Kandelia obovata Sheue, Liu & Yong.

ABSTRACT: Kandelia obovata is a widely distributed species of mangrove in Eastern Asia. In this study, the complete chloroplast genome sequence of K. obovata was assembled and characterised from high-throughput sequencing data. The chloroplast genome was 168,244?bp in length, consisting of large single-copy (LSC) and small single-copy (SSC) regions of 94,869?bp and 20,088?bp, respectively, which were separated by a pair of 26,618?bp inverted repeat (IR) regions. The genome is predicted to contain 129 genes, including 84 protein-coding genes, 37 tRNA genes, and 8 rRNA genes. The overall GC content of the genome is 34.6%. A phylogenetic tree reconstructed by 15 chloroplast genomes reveals that K. obovata is mostly related to Rhizophora stylosa.

SUBMITTER: Du Z

PROVIDER: S-EPMC7707256 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature

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The complete chloroplast genome of a mangrove Kandelia obovata Sheue, Liu & Yong.

Du Zhaokui Z Li Junmin J Yang Dang D

Mitochondrial DNA. Part B, Resources 20191007 2

Kandelia obovata is a widely distributed species of mangrove in Eastern Asia. In this study, the complete chloroplast genome sequence of K. obovata was assembled and characterised from high-throughput sequencing data. The chloroplast genome was 168,244 bp in length, consisting of large single-copy (LSC) and small single-copy (SSC) regions of 94,869 bp and 20,088 bp, respectively, which were separated by a pair of 26,618 bp inverted repeat (IR) regions. The genome is predicted to co ...[more]

PMID: 33366018

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Project description:As a dominant mangrove species, Kandelia obovata is distributed in an intertidal marsh with an active H2S release. Whether H2S participates in the salt tolerance of mangrove plants is still ambiguous, although increasing evidence has demonstrated that H2S functions in plant responses to multiple abiotic stresses. In this study, NaHS was used as an H2S donor to investigate the regulatory mechanism of H2S on the salt tolerance of K. obovata seedlings by using a combined physiological and proteomic analysis. The results showed that the reduction in photosynthesis (Pn) caused by 400 mM of NaCl was recovered by the addition of NaHS (200 ?M). Furthermore, the application of H2S enhanced the quantum efficiency of photosystem II (PSII) and the membrane lipid stability, implying that H2S is beneficial to the survival of K. obovata seedlings under high salinity. We further identified 37 differentially expressed proteins by proteomic approaches under salinity and NaHS treatments. Among them, the proteins that are related to photosynthesis, primary metabolism, stress response and hormone biosynthesis were primarily enriched. The physiological and proteomic results highlighted that exogenous H2S up-regulated photosynthesis and energy metabolism to help K. obovata to cope with high salinity. Specifically, H2S increased photosynthetic electron transfer, chlorophyll biosynthesis and carbon fixation in K. obovata leaves under salt stress. Furthermore, the abundances of other proteins related to the metabolic pathway, such as antioxidation (ascorbic acid peroxidase (APX), copper/zinc superoxide dismutase (CSD2), and pancreatic and duodenal homeobox 1 (PDX1)), protein synthesis (heat-shock protein (HSP), chaperonin family protein (Cpn) 20), nitrogen metabolism (glutamine synthetase 1 and 2 (GS2), GS1:1), glycolysis (phosphoglycerate kinase (PGK) and triosephosphate isomerase (TPI)), and the ascorbate-glutathione (AsA-GSH) cycle were increased by H2S under high salinity. These findings provide new insights into the roles of H2S in the adaptations of the K. obovata mangrove plant to high salinity environments.

Dataset Information

The complete chloroplast genome of a mangrove Kandelia obovata Sheue, Liu & Yong.

Publications

The complete chloroplast genome of a mangrove <i>Kandelia obovata</i> Sheue, Liu & Yong.

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