Classification of fruit trichomes in cucumber and effects of plant hormones on Type Ⅱ fruit trichome development
作者单位：Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable CropsCollege of HorticultureChina Agricultural University
会议名称：《中国园艺学会第八届黄瓜学术研讨会》
会议日期：2018年
学科分类：09[农学] 0902[农学-园艺学] 090202[农学-蔬菜学]
摘 要：The fruit trichomes or fruit spines of cucumber,Cucumis sativus L.,are highly specialized structures originating from epidermal cells with diverse morphology,which grow perpendicular to the fruit *** understand the underlying molecular mechanisms of fruit trichome development,in this study,we conducted morphological characterization and classification of cucumber fruit trichomes and their developmental *** examined the fruit trichomes among 200 cucumber varieties,which could be classified into eight morphologically distinct types(ⅠtoⅧ).Investigation of the organogenesis of the eight types of trichomes revealed two main developmental *** development of glandular trichomes had multiple stages including initiation and expansion of the trichome precursor cell which protuberating out of the epidermal surface,followed by periclinal bipartition to two cells(top and bottom) which later formed the head region and the stalk,respectively through subsequent cell *** non-glandular trichome development started with expansion of the precursor cell perpendicularly to the epidermal plane followed by cell periclinal division to form a stalk comprising of some rectangle cells and a pointed apex cell;then the base cell started anticlinal bipartition to two cells,which then underwent many cell divisions to form a multicellular spherical *** addition,phytohormones as environmental cues were closely related to trichome *** found that GA and BAP were capable of increasing trichome number per fruit with distinct effects under different concentrations.