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《Journal of Beijing Forestry University》 2010-04
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Development of stamens and carpels in single and double flowers of Cerasus serrulata

LIU Zhi-xiong1,2;MA Xiao-ting1;CHENG Peng-jun1;LIU Di1;LI Feng-lan1 1 College of Biological Sciences and Biotechnology,Beijing Forestry University,100083,P.R.China;2 College of Horticulture and Gardening,Yangtze University,Jingzhou,Hubei,434025,P.R.China.  
Morphogenesis of stamens and carpels in single and double flowers of Cerasus serrulata var.lannesiana as well as the development of their male and female gametophytes were investigated.First,the ‘Makino’ovules are borne on unsealed carpels.During their development,carpels close with the ovules hidden inside.The ovule is anatropous,bitegmic and crassinucellate.Megaspore mother cells undergo meiosis and develop into linear tetrad.Subsequently,the larger one at the chalazal end becomes functional megaspore and develops into an embryo sac of a polygonum type after the third mitotic division.The ‘Makino’ microspore tetrads belong to the tetrahedral type,with two-celled mature pollen.In contrast,the ‘Albo-rosea’and ‘Hisakura’double flowers have petaloid anthers and leaflike carpels,with fewer numbers of stamens compared with ‘Makino’.The petaloid anther houses a large number of sterile pollen grains.Flowers on the same tree show different final floral architectures,where some flowers contain ectopic unsealed carpels housing abortion ovules.The molecular mechanisms of double flower morphogenesis in cherry are discussed.
【Fund】: 国家自然科学基金项目(30571473);; “948”国家林业局引进项目(99417)
【CateGory Index】: S685.99
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