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Mechanism of Gonadal precocity in Cultured Large Yellow Croaker, Pseudosciaena Crocea : A Study of Microstructure and Submicrostructure of Leydig Cell and Sertoli Cell in Testis

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Marine Science Bulletin 2002年第2期4卷 90-94页

作者：方永强翁幼竹周晶谢访靖刘家富 Third Institute of Oceanography SOA Xiamen 361005 The Experimental Farm of Aquaculture Technology Extension Station Ningde 352100

Microstructure and submicrostructure of Leydig cell and Sertoli cell in the testis of gonadal precocity and immaturation in cultured large yellow croaker, Pseudosciaena crocea, are studied using histology and electron microscopic technique. The results indicate that the fine structure of the two kinds of cells in different development stages presents an obvious difference. The smooth endoplasmic reticular and tubular mitochondria of Leydig cell and Sertoli cell are well developed in the testis of gonadal precocity, but poorly developed in the testis of immaturation. We suggest that the reason for gonadal precocity in the large yellow croaker may be related to the earlier development and maturation of Leydig cell and Sertoli cell.

关键词： Pseudosciaena crocea, testis, Leydig cell, Sertoli cell, gonadal precocity

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Identification of gamyb-4 and Analysis of the Regulatory Role of GAMYB in Rice Anther Development

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Journal of Integrative Plant Biology 2010年第7期52卷 670-678页

作者： Zhenhua Liu Wenjie Bao Wanqi Liang Jingyuan Yin Dabing Zhang School of Life Sciences Shanghai University Shanghai 200240 China School of Life Science and Biotechnology Shanghai Jiao Tong University Shanghai 200240 China

In higher plants, male reproductive development is a complex biological process that includes cell division and differentiation, cell to cell communication etc., while the mechanism underlying plant male reproductive development remains less understood. GAMYB encodes a gibberellins acid （GA） inducible transcription factor that is required for the early anther development in rice （Oryza sativa L.）. Here, we report the isolation and characterization of a new allele gamyb-4 with a C base deletion in the second exon （-I-2308）, causing a frame shift and premature translational termination. Histological analysis showed that gamyb-4 developed abnormal enlarged tapetum and could not undergo normal meiosis. To understand the regulatory role of GAMYB, we carried out quantitative reverse transcription-polymerase chain reaction analysis and comparison of microarray data. These results revealed that the expression of TDR （TAPETUM DEGENERATION RETARDATION）, a tapetal cell death regulator, was downregulated in gamyb-4 and udtl （undeveloped tapetuml）. While the GAMYB expression was not obviously changed in tdr and udtl-1, and no apparent expression fold change of UDT1 in tdr and gamyb-4, suggesting that TDR may act downstream of GAMYB and UDT1, and GAMYB and UDT1 work in parallel to regulate rice early anther development. This work is helpful in understanding the regulatory network in rice anther development.

关键词： Plants Planting precocity Anthers Rice Cells Lymphocytes Reproduction Reproductive performance Males

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Dynamics of genital human papillomavirus （HPV） nfections among males eventually being uncovered

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Asian Journal of Andrology 2011年第3期13卷 361-362页

作者： Kari Syrjanen Department of Oncology and Radiotherapy Turku University Hospital Turku FIN-20521 Finland

Studies addressing the type-specific outcomes of cervical human papillomavirus （HPV） infections in women started emerging since the early 2000s, resulting in prolific lit- erature and more profound understanding of ... 详细信息

关键词： Infection Pathogenicity Role of women Women Males precocity Natural history History Genotypes

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Performance and Cultivation Techniques of a New Pear Variety‘Jixiu’in Central Hebei Province

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Asian Agricultural Research 2022年第7期14卷 55-57页

作者： Yongbo WANG Yaru WANG Xiao LI Yingtao WANG Hongbao WANG Jin WANG Yong LI Shijiazhuang Fruit Research Institute Hebei Academy of Agricultural and Forestry SciencesShijiazhuang 050061China

‘Jixiu’is a new early ripening pear variety bred by‘Jimi’×‘Xinhang’,and its fruit quality is *** has performed well in central and southern *** paper introduces its botanical characteristics,growth phenology,growth and fruiting habits,pollination characteristics and disease resistance in central and southern Hebei.A set of suitable cultivation techniques for Jixiu pear were summarized,including pruning,fruit thinning and bagging,water and fertilizer management,pest and disease control and so on,which provided theoretical support for the popularization and demonstration of this new variety.

关键词： Pear New varieties Jixiu precocity

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