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  • 非血管植物生命周期

    Photo of green moss with small, upright sporophytes growing from it.

    Haploid or diploid. Which would you say is dominant?
    ::嗜血剂或嗜血剂 你说哪个占支配地位?

    That may depend on the plant. Start with moss . The typical . But such a simple plant has a very interesting . Whereas most kinds of plants have two sets of in their vegetative , mosses have only a single set of chromosomes. So, how does occur?
    ::这可能取决于植物。从苔类开始。典型的。但这种简单的植物非常有趣。虽然大多数植物的植物在植物植物中都有两组,但苔类只有单一的染色体。如何发生呢?

    Life Cycle of Nonvascular Plants
    ::非血管植物生命周期

    Nonvascular plants include mosses, liverworts , and hornworts . They are the only plants with a life cycle in which the gametophyte generation is dominant. Figure shows the life cycle of moss. The familiar, green, photosynthetic moss plants are gametophytes . The sporophyte generation is very small and dependent on the gametophyte plant.
    ::非血管植物包括苔胱、肝脏和角状植物。它们是唯一一个生命周期以游戏植物一代为主的植物。图表显示了苔的生命周期。熟悉的绿色和光合藻类植物是游戏植物。麻风植物非常小,依赖游戏植物。

    Life cycle of a typical moss, illustrating gametophyte and sporophyte stages and reproductive structures.

    Like other bryophytes, moss plants spend most of their life cycle as gametophytes. Find the sporophyte in the diagram. Do you see how it is growing on the gametophyte plant?
    ::与其它的血清植物一样, 苔榈植物的生命周期大部分时间 都作为草药植物。 在图表中找到。 您看到它是如何生长在草药植物上吗 ?

    The gametophytes of nonvascular plants have distinct male or female reproductive organs (see Figure ). , called antheridia (singular, antheridium), produce motile with two flagella . Female reproductive organs, called archegonia (singular, archegonium), produce eggs .
    ::非血管植物的组合植物有不同的男性生殖器官或女性生殖器官(见图 )。 女性生殖器官(单胞类、类)的生长方式与两个旗形相配,女性生殖器官(单胞类、类)的生长方式与两个旗形相配,女性生殖器官(单胞类、类)的生长方式与蛋的生长方式相同。

    Moss plants showing archegonia and antheridia reproductive organs in gametophyte stage.

    The reproductive organs of bryophytes like this liverwort are male antheridia and female archegonia.
    ::象这个肝脏的血道动物的生殖器官 是雄性雌性激素和雌性大肠杆菌。

    In order for to occur, sperm must swim in a drop of from an antheridium to an egg in an archegonium. If fertilization takes place, it results in a zygote that develops into a tiny sporophyte on the parent gametophyte plant. The sporophyte produces haploid spores , and these develop into the next generation of gametophyte plants. Then the cycle repeats.
    ::为了发生这种情况,精子必须从一个流到一个拱门中的卵子。如果进行了授精,它将导致一个zgote,它会发展成母植物的细小的花生植物。花生植物产生胡萝卜,它们会发展成下一代的植物。然后循环重复。

       

     

    Summary
    ::摘要

    • In nonvascular plants, the gametophyte generation is dominant. The tiny sporophyte grows on the gametophyte plant.
      ::在非血管植物中,游戏植物一代占主导地位。小的麻风植物生长在游戏植物上。

    Review
    ::回顾

    1. Describe antheridia and archegonia and their functions.
      ::描述 anteridia 和 argegonia 及其功能。
    2. Create your own cycle diagram to represent the moss life cycle.
      ::创建您自己的循环图, 以代表 Mops 生命周期 。