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The melastoma dodecandrum genome and the evolution of Myrtales

Journal of Genetics and Genomics 2022年第2期49卷 120-131页

作者： Yang Hao Yu-Zhen Zhou Bin Chen Gui-Zhen Chen Zhen-Ying Wen Diyang Zhang Wei-Hong Sun Ding-Kun Liu Jie Huang Jin-Liao Chen Xiao-Qin Zhou Wan-Lin Fan Wen-Chun Zhang Lin Luo Wen-Chao Han Yan Zheng Long Li Peng-Cheng Lu Yue Xing Shu-Ya Liu Jia-Ting Sun Ying-Hui Cao Yan-Ping Zhang Xiao-Ling Shi Sha-Sha Wu Ye Ai Jun-Wen Zhai Si-Ren Lan Zhong-Jian Liu Dong-Hui Peng Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at College of Landscape Architecture Fujian Agriculture and Forestry UniversityFuzhou 350002China Innovation and Application Engineering Technology Research Center of Ornamental Plant Germplasm Resources in Fujian Province Fuzhou 350002China

melastomataceae has abundant morphological diversity with high economic and ornamental merit in Myrtales. The phylogenetic position of Myrtales is still contested. Here, we report the chromosome-level genome assembly of melastoma dodecandrum in melastomataceae. The assembled genome size is299.81 Mb with a contig N50 value of 3.00 Mb. Genome evolution analysis indicated that M. dodecandrum,Eucalyptus grandis, and Punica granatum were clustered into a clade of Myrtales and formed a sister group with the ancestor of fabids and malvids. We found that M. dodecandrum experienced four whole-genome polyploidization events: the ancient event was shared with most eudicots, one event was shared with Myrtales, and the other two events were unique to M. dodecandrum. Moreover, we identified MADS-box genes and found that the AP1-like genes expanded, and AP3-like genes might have undergone subfunctionalization. The SUAR63-like genes and AG-like genes showed different expression patterns in stamens, which may be associated with heteranthery. In addition, we found that LAZY1-like genes were involved in the negative regulation of stem branching development, which may be related to its creeping features. Our study sheds new light on the evolution of melastomataceae and Myrtales, which provides a comprehensive genetic resource for future research.

关键词： melastoma Genome evolution Flower development Heteranthery Flower color Creeping stem

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Cytotoxicity screening of melastoma malabathricum extracts on human breast cancer cell lines in vitro

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Asian Pacific Journal of Tropical Biomedicine 2014年第7期4卷 545-548页

作者： Nurfariza Ahmad Roslen Nur Aizura Mat Alewi Hadji Ahamada Mohammad Syaiful Bahari Abdull Rasad Department of Biomedical Science.Kulliyyah of Allied Health Sciences HUM25200 KuantanPahangMalaysia

Objective:To screen the cytotoxic activity of Melasloma malabathricum(M,malubathricum)against human breast carreer cell line(MCF-7)in vitro.Methods:A three steps extraction protocol using n-hexane,chloroform and methanol as the solvents systems was carried out on leaves,stems and flowers of M.nalabathricum.Dimethyl sulfoxide was used in extracts dilution and serial dilutions were conducted to obtain five different extract concentrations(100μg/mL,50μg/mL,25μg/mL,123μg/rnL and 6.25μg/mL).The evaluation of cell growth was determined using methylene blue assay.Results:Methanol extract from the leaves showed significant anticancer activity against MCF-7cell lines with the TC_(50)value of 7.14μg/ml while methanol and chloroform extract from the flowers exhibited a moderate activity towards MCF-7 cell line,with the IC_(50)value of 33.63μg/mL and 45.76μg/mL respectively after 72 h of treatment.Conclusions:The extracts from leaves and flowers of M.nulabatkricum showed promising anticancer activity toward human breast cancer cell lines with the lowest IC_(50)at 7.14μg/mL while the extracts from stems showed less growth inhibition activity.

关键词： melastoma malabathricum Cytotoxicity Human breast cancer MCF-7

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Potentials of <i>melastoma malabathricum</i>Linn. Flower and Fruit Extracts as Antimicrobial Infusions

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American Journal of Plant Sciences 2012年第8期3卷 1127-1134页

作者： Siti Nurhadis Che Omar Janna Ong Abdullah Khairul Anuar Khairoji Sieo Chin Chin Muhajir Hamid Department of Microbiology Faculty of Biotechnology and Biomolecular Sciences Universiti Putra Malaysia Serdang Malaysia Institute of Bioscience Universiti Putra Malaysia Serdang Malaysia

melastoma malabathricum Linn. is a shrub that belongs to the family melastomataceae and a common herbal plant used in folk medicines to treat inflamed wounds. This study was carried out with the aim to evaluate the inhibitory activities of different concentrations of the M. malabathricum Linn. flower and fruit crude extracts against a variety of microorganisms. The inhibitory effects of both extracts were tested against the microorganisms using the disc diffusion method. The lowest concentrations of the extracts producing inhibition zones against the test microorganisms were used to determine their Minimum Inhibitory Concentrations (MICs) and Minimum Microbicidal Concentrations (MMCs). Both crude extracts showed strong inhibitory activities against Gram-positive bacteria. The range of MIC values for the crude flower and fruit extracts on all the bacteria tested were 12.5 to 100.0 mg/ml. Overall, Gram-positive bacteria were more susceptible to the crude extracts compared to Gram-negative species, potentiating a possible use of the extracts to inhibit or kill potential pathogens.

关键词： melastoma malabathricum Linn. Flower Fruit Disc Diffusion Method Minimal Inhibitory Concentration Minimal Microbicidal Concentration

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野牡丹异型雄蕊的功能分化

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生物多样性 2009年第2期17卷 174-181页

作者：路国辉武文华王瑞珍李新亮王英强华南师范大学生命科学学院广东省植物发育工程重点实验室广东省高等学校生态与环境科学重点实验室广州510631

野牡丹科植物具有形态、大小和颜色显著不同的两种异型雄蕊。关于其异型雄蕊是否具有功能分化还一直存在争论。本文以野牡丹科植物野牡丹(melastoma malabathricum)为实验材料,比较了两种异型雄蕊在传粉过程中的功能作用。结果表明,两... 详细信息

野牡丹科植物具有形态、大小和颜色显著不同的两种异型雄蕊。关于其异型雄蕊是否具有功能分化还一直存在争论。本文以野牡丹科植物野牡丹(melastoma malabathricum)为实验材料,比较了两种异型雄蕊在传粉过程中的功能作用。结果表明,两种异型雄蕊在形态、花粉量和人工控制实验条件下的结籽数,以及主要传粉昆虫木蜂(Xylocopa sp.)访花时的行为等方面都有显著差异,说明两种雄蕊在传粉过程中存在一定的功能分化:外轮紫色雄蕊中的花粉为后代提供雄配子,而内轮黄色雄蕊中的花粉则为传粉昆虫提供食物。但两种雄蕊在花粉活性、花粉组织化学成分和结实率方面差异均不显著,表明两者在生理上并没有分化。实验结果还表明,除花前套袋不结实外,自交、异交和自然对照都具有较高的结实率,说明野牡丹不存在无融合生殖和主动自交及自交不亲和现象,为兼性异交。

关键词： melastoma malabathricum 花部形态花粉传粉繁育系统

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