Genes of carotenoid biosynthesis pathway in the moss Hylocomium splendens: identification and differential expression during abiotic stresses

IF 2.2 4区 生物学 Q2 PLANT SCIENCES Theoretical and Experimental Plant Physiology Pub Date : 2024-02-23 DOI:10.1007/s40626-024-00309-4
Albina G. Renkova, Milana V. Koulintchenko, Anastasia B. Mazina, Ilya Y. Leksin, Farida V. Minibayeva
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Abstract

A promising approach to solve the problem of tolerance of plants in hostile environments is to focus of stress tolerance mechanisms of extremophilic plants, in particular mosses. Along with the universal stress mechanisms, bryophytes exhibit a unique spectrum of secondary metabolites such as carotenoids, a lipophilic metabolite derived from the isoprenoid pathway. The main representatives of carotenoids in mosses are α- and β-carotene, lutein, neo-, viola- and zeaxanthins. Hylocomium splendens is one of the most common and widespread mosses of Northern Hemisphere. The genome of this moss has not been sequenced, and the carotenoid biosynthesis pathway (CBP) genes of this species have not been reported to date. This is the first report to of an attempt to identify and characterize the CBP genes in H. splendens. As a result of cloning, sequencing, and in silico analysis, we identified and characterized ten CBP genes in H. splendens with a full ORF, and prediction of subcellular localization suggests chloroplast localization of CBP proteins. Using multiple alignments and phylogenetic and homology analyses, we demonstrated that the CBP genes of H. splendens share high similarity with the sequences in other bryophytes. Differential expression of CBP transcripts during abiotic stresses was more evident for genes in the middle and downstream steps of CBP. This work provides information on the molecular genetics of CBP in extremophilic bryophytes. Analysis of CBP genes can help to unravel the genetic evolution of carotenoid biosynthesis in plants.

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芨芨草苔中类胡萝卜素生物合成途径的基因:识别和在非生物胁迫下的差异表达
要解决植物在恶劣环境中的耐受性问题,一种很有前景的方法是重点研究嗜极植物(尤其是苔藓植物)的抗逆机制。除了普遍的胁迫机制外,苔藓植物还表现出独特的次生代谢物谱系,如类胡萝卜素,这是一种从异戊烯类途径中提取的亲脂代谢物。苔藓中类胡萝卜素的主要代表是α-和β-胡萝卜素、叶黄素、新黄素、中黄素和玉米黄素。Hylocomium splendens 是北半球最常见和分布最广的苔藓之一。该苔藓的基因组尚未测序,其类胡萝卜素生物合成途径(CBP)基因迄今也未见报道。这是第一份关于白芨CBP基因鉴定和特征描述的报告。通过克隆、测序和硅学分析,我们鉴定并描述了白芨中十个具有完整 ORF 的 CBP 基因,亚细胞定位预测表明 CBP 蛋白具有叶绿体定位功能。通过多重比对、系统发育和同源性分析,我们证明白芨的 CBP 基因与其他骨干植物的序列具有高度相似性。CBP转录本在非生物胁迫下的差异表达在CBP中下游步骤的基因中更为明显。这项工作提供了嗜极真菌CBP分子遗传学方面的信息。对CBP基因的分析有助于揭示植物类胡萝卜素生物合成的遗传进化过程。
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来源期刊
CiteScore
4.20
自引率
7.70%
发文量
32
期刊介绍: The journal does not publish articles in taxonomy, anatomy, systematics and ecology unless they have a physiological approach related to the following sections: Biochemical Processes: primary and secondary metabolism, and biochemistry; Photobiology and Photosynthesis Processes; Cell Biology; Genes and Development; Plant Molecular Biology; Signaling and Response; Plant Nutrition; Growth and Differentiation: seed physiology, hormonal physiology and photomorphogenesis; Post-Harvest Physiology; Ecophysiology/Crop Physiology and Stress Physiology; Applied Plant Ecology; Plant-Microbe and Plant-Insect Interactions; Instrumentation in Plant Physiology; Education in Plant Physiology.
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