A chromosome-level genome assembly for Dracaena cochinchinensis reveals the molecular basis of its longevity and formation of dragon’s blood

Xu, Yunyuan; Zhang, Kaijian; Zhang, Zhonglian; Liu, Yang; Lv, Feng; Sun, Peng; Gao, Shixi; Wang, Qiuling; Yu, Cuicui; Jiang, Jialin; Li, Chuang‐Jun; Song, Meifang; Gao, Zhihui; Sui, Chun; Li, Haitao; Jin, Yue; Guo, Xinwei; Wei, Jianhe

doi:10.1016/j.xplc.2022.100456

Cited by 10 publications

(18 citation statements)

References 89 publications

(126 reference statements)

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“…Dracaena trees are remarkably long‐lived plants and tertiary relict species (Maděra et al, 2020; Xu et al, 2022), which shows that they have a strong survival ability. The studies of the stem structure can uncover the ability to a certain extent.…”

Section: Discussionmentioning

confidence: 99%

“…Dragon's blood, a highly prized traditional medicine in many cultures, makes the Dracaena trees relatively famous (Adolt & Pavlis, 2004; Liu et al, 2021; Xu et al, 2022). At the same time, as a plant with high adaptability to drought stress and a monocot plant with secondary growth, Dracaena trees has also attracted the attention of many scholars (Cheadle, 1937; Jupa et al, 2017; Jura‐Morawiec, 2017; Rudall, 1991; Tulik et al, 2022; Zimmermann & Tomlinson, 1970).…”

Section: Introductionmentioning

confidence: 99%

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Structure and histochemistry of the stem of Dracaena cambodiana Pierre ex Gagnep

Zhang

Liu

Wang

et al. 2023

Microscopy Res & Technique

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Dracaena cambodiana Pierre ex Gagnep is an important plant resource for producing dragon's blood and one of most popular ornamental trees in China. For a better understanding of the physiological function of the stem, the structural characteristics and main substance histological location of the stems of D. cambodiana were studied. The structural characteristics of the different developmental stages of stems of D. cambodiana were observed and described detailly. And then a schematic diagram of the mature stem was created. Histochemical staining showed that two kinds of polysaccharides distributed in parenchymal cells. Saponins distributed mainly in ground tissue and phenolic compounds distributed mainly in the thick cell walls. An abundant of calcium oxalate raphide bundles were identified in cortex and primary tissue. Finally, the role of the above results in the taxonomy of Dracaena species and in their strong adaptability was discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure and histochemistry of the stem of Dracaena cambodiana Pierre ex Gagnep

Zhang

Liu

Wang

et al. 2023

Microscopy Res & Technique

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“…Among them, zeatin O-glucosyltransferase belongs to the CK Oglucosyltransferase superfamily [28]. Zeatin O-glucosyltransferase is a negative regulator of growth and development, and its up regulation may be the reason for the long life and slow growth of Dracaena [29]. In this study, the expression of O-glucosyl transferase was low in the stem at the tuber formation stage and high at the tuber expansion stage, which may contribute to the gradual slowing of potato growth as development progressed.…”

Section: Discussionmentioning

confidence: 99%

WGCNA Identifies a Comprehensive Gene Co-Expression Network Associated with Development in autotetraploid potato tissues

Li¹,

Wang²,

Wang³

2023

Preprint

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The formation and development of potato tissues and organs is a complex process regulated by a variety of genes and environmental factors. However, the regulatory mechanisms underlying the growth and development are still unclear. In this study, we used autotetraploid potato JC14 as experimental subject to analyze the transcriptome of root, stem and leaf at seedling, tuber formation and tuber expansion stages to explore the spatio-temporal expression pattern of genes and genetic development characteristics. The results identified thousands of differentially expressed genes and KEGG pathway enrichment analysis showed that these genes were mainly involved in defense response and carbohydrate metabolism pathways. A total of 12 co-expressed Gene modules were identified by Weighted Gene Co-expression Network Analysis (WGCNA), and 4 modules were screened out with the highest correlation with potato stem developmental traits. Core genes in the network were further investigated and functionally annotated by computing the connectivity of genes within the module. The results unveiled number of hub genes in stems at different developmental stages, including carbohydrate metabolism related genes, the defense response related genes, and transcription factors. These findings provide important leads for further understanding of the molecular regulation and genetic mechanisms of potato tissue development.

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“…Recent studies of the leaf shedding of dragon trees have shown that dragon’s blood is in the form of vesicles, which have a tendency to aggregate and fill the cells or intercellular spaces ( Jura-Morawiec et al., 2023 ). After the injury of the secondary tissues, resin typically fills the parenchyma cells and enters tracheids through the pits occluding their lumen ( Cui et al., 2013 ; Jura-Morawiec and Tulik, 2015 ; Xu et al., 2022 ; Figure 1B ). Resin secretion can be additionally enhanced by high humidity and fungal infection ( Wang et al., 2010 , 2011 ), and its accumulation increases after acid and sodium salt treatment (reviewed by Ding et al., 2020 ).…”

Section: Resin-secreting Cells In the Secondary Growth Of Monocotyled...mentioning

confidence: 99%

“…However, it should be noted that the appearance of the red resin color is a gradual process and is not visible immediately after the wound. In D. draco , it was observed two weeks after stem cutting ( Jura-Morawiec and Tulik, 2015 ), while in D. cochinchinensis it was visible 3-4 days after wounding or fungal infection ( Wang et al., 2011 ), with a clear red layer covering the wound site after 90 days ( Xu et al., 2022 ).…”

Section: Resin-secreting Cells In the Secondary Growth Of Monocotyled...mentioning

confidence: 99%

An arrangement of secretory cells involved in the formation and storage of resin in tracheid-based secondary xylem of arborescent plants

Tulik,

Jura-Morawiec

2023

Front. Plant Sci.

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The evolution of the vascular system has led to the formation of conducting and supporting elements and those that are involved in the mechanisms of storage and defense against the influence of biotic and abiotic factors. In the case of the latter, the general evolutionary trend was probably related to a change in their arrangement, i.e. from cells scattered throughout the tissue to cells organized into ducts or cavities. These cells, regardless of whether they occur alone or in a cellular structure, are an important defense element of trees, having the ability to synthesize, among others, natural resins. In the tracheid-based secondary xylem of gymnosperms, the resin ducts, which consist of secretory cells, are of two types: axial, interspersed between the tracheids, and radial, carried in some rays. They are interconnected and form a continuous system. On the other hand, in the tracheid-based secondary xylem of monocotyledons, the resin-producing secretory cells do not form specialized structures. This review summarizes knowledge on the morpho-anatomical features of various types of resin-releasing secretory cells in relation to their: (i) location, (ii) origin, (iii) mechanism of formation, (iv) and ecological significance.

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A chromosome-level genome assembly for Dracaena cochinchinensis reveals the molecular basis of its longevity and formation of dragon’s blood

Cited by 10 publications

References 89 publications

Structure and histochemistry of the stem of Dracaena cambodiana Pierre ex Gagnep

Structure and histochemistry of the stem of Dracaena cambodiana Pierre ex Gagnep

WGCNA Identifies a Comprehensive Gene Co-Expression Network Associated with Development in autotetraploid potato tissues

An arrangement of secretory cells involved in the formation and storage of resin in tracheid-based secondary xylem of arborescent plants

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