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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
WeChat:zwxb_2009
Table of Content
- Establishment of Regeneration System of Chrysanthemum vestitum with Three Floret Forms
- Xiaoyun Wu, Minling Liao, Xueru Li, Zichun Shu, Jiatong Xin, Bohan Zhang, Silan Dai
- Chinese Bulletin of Botany. 2024, 59(2): 0-0. doi:10.11983/CBB23084
- Abstract ( 109 ) PDF (738KB) ( 74 ) Save
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- Research Progress of Leaf Color Variation Mechanism in Woody Plants
- Jiahang Chen, Yingzhi Qin, Weinan Li, Jinhuan Chen
- Chinese Bulletin of Botany. 2024, 59(2): 0-0. doi:10.11983/CBB23019
- Abstract ( 94 ) PDF (1073KB) ( 85 ) Save
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Chrysanthemum vestitum, one of the closely related hexaploid wild species of cultivated C. × morifolium, has typical flat, tubular and mixed floret forms in its natural population, and is a typical material for studying the petal variation in chrysanthemum. The development progress of its ray floret is affected by key differential genes, but the lack of stable and efficient regeneration systems of different floret forms has restricted the study of petal type-related genes in C. vestitum. In this paper, the authors used three floret forms of C. vestitum collected from FuNiu Mountain in Henan Province to establish regeneration systems using leaves and transverse thin cell layer (tTCL) as explants. The results showed that the optimal medium for callus induction and adventitious buds differentiation was MS+1 mg∙L–1 NAA+2 mg∙L–1 6-BA with leaves of flat floret form as explants, and the callus induction rate was 100% at 20 days of inoculation. The differentiation rate of adventitious buds was 100%. The optimal rooting medium was 1/2 MS+0.2 mg∙L–1 NAA, and the rooting rate of regenerated seedlings was 100%. The optimal leaf regeneration system of flat floret strain was suitable for tubular floret and mixed floret strains. The differentiation rates of adventitious buds were 83.46% and 91.67%, respectively, and the rooting rates were 100%. The flowering plants were observed after transplanting, and it was found the flower types of the regenerated plants with three different floret forms obtained by the leaf regeneration system were stable, which provided a technical method for the subsequent analysis of the morphological variation mechanism of ray florets by using different floret forms of C. vestitum.
Woody color plants have bright foliage, high ornamental value, and have high values to the landscape. In recent years, more and more attention has been paid to the configuration of woody colorants in landscape design. The most direct cause of leaf color change is the alteration in pigment content and their ratio in the leaves. Leaf color variation is influenced by both internal heredity and external environmental factors. By controlling light, temperature and other conditions, leaf color can be regulated. With the development of molecular biology, several key genes for leaf color variation have been discovered in woody plants. Here, we summarized the progresses of research in leaf color variation in woody plants from the aspects of environmental factors, leaf microstructure, and molecular mechanism of leaf color variation and related genes, so as to provide a theoretical basis for further improving the mechanism of leaf color variation in woody plants and cultivating ornamental tree species with colored leaves.
- 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.