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    Research Progress on the Mechanism of Plant Hormone Regulating Yield and Latex Flow in Hevea brasiliensis
    Bingbing GUO, Mingyang LIU, Longjun DAI, Hong YANG, Lifeng WANG
    Bulletin of Botanical Research    2024, 44 (2): 161-167.   DOI: 10.7525/j.issn.1673-5102.2024.02.001
    Abstract26)   HTML1)    PDF(pc) (537KB)(35)       Save

    Rubber tree(Hevea brasiliensis) is one of the important tropical cash crops, and natural rubber(NR), a secondary metabolite, is an important industrial raw material and strategic material in China. Phytohormones play important roles in regulating plant growth, development, germination, and environmental responses. Here, the research progress on application of four phytohormones, Ethylene, Abscisic acid, Brassinolides, and Gibberellin in the growth and development of rubber trees, NR biosynthesis, rubber yield, latex flow, and quality formation, was summarized in detail, and the application prospect of four phytohormones in mechanism research of improving rubber production and latex flow was looked forward to provide theoretical support for the rubber industry development.

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    Recent Advances on Plant Root Thermomorphogenesis
    Wei LIU, Ziqiang ZHU
    Bulletin of Botanical Research    2024, 44 (1): 1-7.   DOI: 10.7525/j.issn.1673-5102.2024.01.001
    Abstract104)   HTML22)    PDF(pc) (1194KB)(139)       Save

    Plant development is highly plastic. As ambient temperature increased, plant stems and petioles elongated, and promoted leaf surface cooling, the process known as thermomorphogenesis. High temperatures also triggered root elongation, which named as root thermomorphogenesis. There were many studies on the regulation of plant shoot thermomorphogenesis, but few investigations on the regulatory mechanisms of plant root thermomorphogenesis. In this review, we summarized the recent progresses in the field of plant root thermomorphogenesis, and proposed future research directions.

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    Application Progress of RNA-Seq Technology in Rare and Endangered Plants
    Xinyu NI, Junying HE, Mengjiao YAN, Chao DU
    Bulletin of Botanical Research    2023, 43 (4): 481-492.   DOI: 10.7525/j.issn.1673-5102.2023.04.001
    Abstract1265)   HTML18)    PDF(pc) (3104KB)(274)       Save

    Rare and endangered plants are important plant resources in nature, and play a key role in the study of plant phylogeny, ecosystem restoration, plant stress resistance physiology, and the excavation of stress-resistance genes. However, the lack of genetic information has severely restricted the conservation and utilization in most endangered plant. Due to the large genomes, complex genetic information, and unclear genetic backgrounds of endangered plants, it is relatively difficult to sequence the genomes of endangered plants. In recent years, RNA-Sequencing could directly sequence non-reference genomic species, what makes it to be widely used in the study of endangeredplants. In addition, this paper presented the prospect of the application of RNA-Sequencing technology in the study of endangered plants and suggested the new ideas of transcriptome using in the endangered plants in future.

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    Research Progress on the Regulatory Mechanism of Plant Root Hair Development
    Yuping QIU, Yichuan WANG, Hongwei GUO
    Bulletin of Botanical Research    2023, 43 (3): 321-332.   DOI: 10.7525/j.issn.1673-5102.2023.03.001
    Abstract1441)   HTML38)    PDF(pc) (2312KB)(376)       Save

    Root hairs are tubular extensions of plant root epidermal cells that play vital roles in soil fixation, water and inorganic salts absorption, and information exchange between plant roots and outside world. The developmental processes of root hair are highly plastic and might easily be affected by various plant hormones and environmental factors. Due to the structural and functional characteristics of root hair, it is often used as model to study apical growth and fate determination of plant cells. Therefore, the regulatory mechanism of root hair development has been a hot topic in the field of botany. The review summarized the research progress in the field of root hair development in the past two decades.

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    An Overview and Prospect on Taxonomy of the Genus Populus
    Xueqin WAN, Yujie SHI, Jinliang HUANG, Jiaxuan MI, Yu ZHONG, Fan ZHANG, Lianghua CHEN
    Bulletin of Botanical Research    2023, 43 (2): 161-168.   DOI: 10.7525/j.issn.1673-5102.2023.02.001
    Abstract618)   HTML69)    PDF(pc) (626KB)(297)       Save

    Since Linnaeus established the genus Populus, many taxonomic studies have been carried out about it and some taxonomic systems have been proposed, while the taxonomy of Populus is still in the stage of traditional morphological classification around the world. Although the taxonomic hierarchy of ‘genus-section-species’ is adopted in many countries, in which has Populus plant distributed, there are great differences in the classification of species, subspecies and varieties. The taxonomists of China and the United States are the representatives of splitter and lumper respectively, and there is a huge gap in poplar classification between them, but each has advantages and disadvantages. Even in China, there are still many problems to be solved. The existing phylogenetic studies about the genus Populus provide useful information to taxonomic revision, but the actual contribution is small yet. The ultimate aim on poplar classification is to establish a unified taxonomic system based on phylogeny in the world. It requires a comprehensive classification based on both population and the concepts of integrated species, which integrates morphology, ecology, biogeography, genomic bioinformatics and evolutionary biology.

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    Recent Advances on Salt Stress Sensitivity and Related Calcium Signals in Plants
    Jiaorao CHEN, Xu XU, Zhangli HU, Shuang YANG
    Bulletin of Botanical Research    2022, 42 (4): 713-720.   DOI: 10.7525/j.issn.1673-5102.2022.04.021
    Abstract641)   HTML40)    PDF(pc) (1470KB)(433)       Save

    Salt stress had a critical impact on plant growth and development, including osmotic stress and ion toxicity, which seriously damaged agricultural production and food security. Under salt stress, plant related receptors were stimulated to send Ca2+ enter the cytoplasmic matrix through the Ca2+ channels opened on the cell membrane and intracellular calcium storage membrane, resulting in the increase of intracellular Ca2+ concentration and calcium signal. Ca2+, as an important second messenger, transmited signals within and between plant cells, downstream, and caused a series of physiological responses to salt stress at different growth and development stages. Calcium signals mainly included calmodulin(CaM), calmodulin like protein(CML), calcium dependent protein kinase(CDPK) and calcineurin B-like protein(CBL) and CBL interacting protein kinase(CIPK), and sensed and transmited specific calcium signal information to the downstream, and activated plant physiological response to salt stress. This paper reviewed how plants perceived salt stress stimulation and the mechanism of calcium signal regulation, and looked forward to the problems should be solved in this research field.

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    Progress on the Metabolic Basis and Regulation Mechanism of Fruit Flavor
    Hua-Feng CHEN, Yu-Qing TANG, Ya-Jie PAN, Xiao-Rui GUO
    Bulletin of Botanical Research    2021, 41 (3): 474-480.   DOI: 10.7525/j.issn.1673-5102.2021.03.019
    Abstract1035)   HTML74)    PDF(pc) (854KB)(942)       Save

    Fruit flavor substances have the characteristics of organ specificity, development specificity, and environmental specificity, and their metabolic mechanism is the material basis of fruit regulation. Ethylene is an important signal molecule in the process of plant growth and development, and has a unique regulatory effect on the synthesis and metabolism of fruit flavor substances. With the maturity and development of multi-organization technology, the use of ethylene to regulate key enzyme activities and gene families and characteristic effect compound genes in the process of flavor substance metabolism to achieve fruit quality improvement has become one of the main methods of fruit flavor regulation. Based on the research of fruit flavors at home and abroad in recent years, this article summarizes the metabolic basis of fruit flavors, regulatory mechanisms, the response of flavors to ethylene, and the research progress of bioinformatics in fruit flavors, and proposes future regulatory directions Three prospects are presented, hoping to provide a certain theoretical reference for the improvement of fruit flavor and nutrition and the purpose of fruit regulation.

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