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  • Hosted by:Chinese Academy of Sciences
    Sponsored by:Institute of Botany, Chinese Academy of Sciences, Botanical Society of China
    Co-hosted by:Key Laboratory of Soybean Molecular Design Breeding, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences
    Institute of Biotechnology and Germplasm Resources, Yunnan AgriculturalAcademy
    Fujian Agriculture and Forestry University
    Hunan Provincial Key Laboratory of Phytohormones and Growth Development, Hunan Agricultural University
    State Key Laboratory of Crops Biology, Shandong Agricultural University

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Table of Content
Research Advances on Nuclear Genomes of Economically Important Trees of Lauraceae
Zhi Yang, Yong Yang
Chinese Bulletin of Botany. 2024, 59(2):  0-0.  doi:10.11983/CBB23035
Abstract ( 91 )   PDF (1116KB) ( 138 )   Save
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With the rapid development of sequencing technology and bioinformatic analytic tools, and the reduction of sequencing cost, the studies of plant genomes has grown in an unprecedent speed. Lauraceae belong to Magnoliids and contain high species diversity in pantropics. Species of this family are mostly woody and economically and ecologically important. Up to now, 13 genomes belonging to eight species have been published in the family Lauraceae. Here, we review the recent advances on nuclear genomes of Lauraceae from four aspects: an overview of published nuclear genomes, characteristics of genomes of Lauraceae, evolution and phylogeny, function genes and gene families. We highlight the recent achievements in phylogeny of magnoliids and Lauraceae based on genomic data, whole genome duplication events, and function genes / gene families of Lauraceae related to the floral organ determination and metabolites. Based on recent advances and problems of genomic studies of Lauraceae, we propose four promising directions for further studies of the family: (1) investigating genome characteristics of the family with extensive sampling; (2) increasing the representation of species sampling in all major clades, e.g. at the tribal level; (3) tackling species with special value, e.g. Laurus nobilis etc.; (4) exploring function genes of various aspects.
Research Progress on Regulatory Mechanisms of OsACS and OsACO in Rice Ethylene Biosynthesis
Jing Xia, Yuchun Rao, Danyun Cao, Yi Wang, Linxin Liu, Yating Xu, Wangshu Mou, Dawei Xue
Chinese Bulletin of Botany. 2024, 59(2):  0-0.  doi:10.11983/CBB23143
Abstract ( 67 )   PDF (1591KB) ( 39 )   Save
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Ethylene plays a pivotal role in regulating the growth, development and stress responses of rice (Oryza sativa). The first step of ethylene biosynthesis is the conversion of methionine to SAM, followed by the synthesis of ethylene precursor ACC under the catalysis of ACC synthase, and finally converted to ethylene by ACC oxidase. In this review, we provid an overview of the lastest research progress, specially focusing on the transcriptional and post-translational regulatory mechanism of two key enzymes, OsACS and OsACO, involved in the rice ethylene biosynthesis pathway. Finally, we present several unsolved questions and insights into future research directions to enhance our understanding of the complex mechanism of ethylene biosynthesis. 
Molecular Mechanism of Petal Doubling of Flower in Angiosperm
Wen Chen, Yingying Zhou, Ping Luo, Yongyi Cui
Chinese Bulletin of Botany. 2024, 59(2):  0-0.  doi:10.11983/CBB23096
Abstract ( 111 )   PDF (1657KB) ( 128 )   Save
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Double flower is characterized by the increase in the number of petals, the folding of petal or the increase in area of petal, which usually has higher ornamental and economic value. Focusing on the increased number of petal and petal-like organ in double flower, we summarized and discussed the molecular mechanism of the formation of double flower in some model plants and ornamental plants, including the key transcription factors and the epigenetic modifications such as miRNAs, DNA methylation, histone modification and chromatin remodeling involved in the regulation of petal number. In the final part of this review, we discussed the developing trend of the future research of molecular mechanism of petal doubling of flower in ornamental plants.