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microspore    
n. 小胞子

小胞子

microspore
n 1: smaller of the two types of spore produced in heterosporous
plants; develops in the pollen sac into a male gametophyte


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  • Microspore - Wikipedia
    Microspores are land plant spores that develop into male gametophytes, whereas megaspores develop into female gametophytes [1] The male gametophyte gives rise to sperm cells, which are used for fertilization of an egg cell to form a zygote
  • Microsporogenesis: Process, Stages, and Significance - Microbe Notes
    The process of formation of microspores or pollen grains inside the pollen sac or microsporangium is called microsporogenesis Maintains ploidy – The process of microsporogenesis produces four haploid microspores from the diploid microspore mother cells
  • Microspore - an overview | ScienceDirect Topics
    Microspores are more rounded than previously and contain several large vacuoles that ultimately coalesce into a single vacuole The large vacuole repositions the nucleus to one side of the microsporocyte The polarized microspore with a large central vacuole and a peripheral nucleus has been called the signet ring stage (Knox, 1984)
  • Microsporogenesis – Definition, Process, Structure, Importance
    Microsporogenesis is the development and maturation of microspores, the haploid progeny of pollen grains By means of meiosis, diploid microsporocytes (pollen mother cells) produce a tetrad of four haploid microspores, therefore guaranteeing genetic recombination and variation in this process
  • Microspore | plant anatomy | Britannica
    The microspore divides to form a reduced gametophyte, merely a jacket of cells and a few sperm cells; the megaspore divides to form a mass of tissue and archegonia, each enclosing an egg …megaspores and the smaller as microspores The megaspores develop into female gametophytes and the microspores into male gametophytes
  • Definition, Diagram, Process, Types - Physics Wallah
    Microspore or the pollen grain is the first cell of male gametophyte It is unicellular and haploid The shape varies from oval to polyhedral The wall of the pollengrain is made of two layers The outer layer is called exine It is thick and ornamented At places exine is thin to form germ pores
  • Formation of Microspores - BYJUS
    Microsporogenesis is the formation of microspores inside a microsporangium (or pollen sac) by meiotic or reduction division The formation of pollen grains from the microspores is termed microgametogenesis The developing anther consists of two types of cells: reproductive and non-reproductive cells
  • Microsporogenesis: Structure and Development - Embibe
    Microsporogenesis is the process of formation of pollen grains (or microspores) inside the pollen sacs (or microsporangium) of flowering plants by meiotic or reduction division Each microspore is the first cell of the male gametophyte that produces male gametes
  • Microspore embryogenesis: establishment of embryo identity and pattern . . .
    This process, referred to as microspore embryogenesis, is widely exploited in plant breeding, but also provides a unique system to understand totipotency and early cell fate decisions
  • Microspore - definition of microspore by The Free Dictionary
    microspore - smaller of the two types of spore produced in heterosporous plants; develops in the pollen sac into a male gametophyte





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