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Bulletin of Botanical Research ›› 2016, Vol. 36 ›› Issue (5): 676-682.doi: 10.7525/j.issn.1673-5102.2016.05.007

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Megasporogenesis, Microsporogensis,and Male and Female Gametophyte Development of Ribes mandshuricum

ZHENG Bao-Jiang1, ZHANG Yi-Fan1, WANG Mei-Juan1, WANG Hai-Zhu1, XU Qi-Jiang2   

  1. 1. College of Life Science, Northeastern Forestry University, Harbin 150040;
    2. The State Key Laboratory of Tree Genetics and Breeding, Harbin 150040
  • Received:2016-04-05 Online:2016-09-15 Published:2016-09-27
  • Supported by:
    The Fundamental Research Funds for the Central Universities(Grant No.2572014EA03);The Innovation Project of State Key Laboratory of Tree Genetics and Breeding(Northeast Forestry University)(2013A06,2013B010);The National Science Foundation for Fostering Talents in Basic Research of the National Natural Science Foundation of China(Grant No.J1210053);Postdoctoral Science Foundation of Heilongjiang province(LBH-Q14011)

Abstract: We used normal paraffin sectioning method to study the megasporogenesis and microsprrogenesis and the development of male and female gametophytes during development process of Ribes mandshuricum(Maxim.) Kom. The flower of R.mandshuricum has five stamens with four locules in each. During meiosis of the mother cell, the division of the cytoplasm can be attributed to the simultaneous type. The tetrad of microspores resulted from the meiosis are simultaneously bilateral and tetrahedral. The mature pollen grains are two-celled. The development of the anther wall belongs to an elementary type. The anther wall can be divided into five layers from outside to inside, including epidermis, endothecium, two middle layers and tapetum. Tapetum belongs to glandular type. The development of embryo sac belongs to the type of polygonum. R.mandshuricum is with one ovary, the ovules in which are anatropous, numerous, crassinucellate, and double integuments. The megasporocyte divides into four linear megaspore in the form of meiosis. The megaspore in chalazal end has a functional ability. There are some abnormal phenomena in the development of the anther, leading to the pollen degeneration.

Key words: Ribes mandshuricum(Maxim.) Kom., megasporogenesis, microsporogenesis, female gametophyte, male gametophyte

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