Life Cycle Gymnosperms

Gymnosperms are classified into four different divisions, viz. the Coniferophyta, Gnetophyta Ginkgophyta and cycads. Of these Coniferophyta represents the largest group. As in other plants evolved, the exchange between generations, is present in the life cycle of gymnosperms. Two different forms alternating with the other is the plant that produces spores (sporophyte) and supporting structure of sex cells (gametophyte). One is dominant and lasts for a long period of gametophyte phase of the life cycle of gymnosperms. Easy to understand, you can study the life cycle of spruce or pine.

Life cycle gymnosperms

Gymnosperms are classified into four different divisions, viz.  the Coniferophyta, Gnetophyta Ginkgophyta and cycads.  Of these Coniferophyta represents the largest group.  As in other plants evolved, the exchange between generations, is present in the life cycle of gymnosperms.  Two different forms alternating with the other is the plant that produces spores (sporophyte) and supporting structure of sex cells (gametophyte).  One is dominant and lasts for a long period of gametophyte phase of the life cycle of gymnosperms.  Easy to understand, you can study the life cycle of spruce or pine.

Sporophyte and Tracking stage
The sporophyte phase is an adult, photosynthesis, plants produce diploid gymnosperms the male cones (cones or pollen) and female cones (ovulate cones).  The former tend to be less than the last.  They thrive in the same plant (monoecious) or different plants (dioecious).  Present when in the same factory, female cones or strobili occur on upper branches, while pollen cones are at the base.  The sporophylls of the male micro-tracked bears strobili, while the female cones are mega-tracked.

Gametophyte: tissue that produces phase
The result microgametophytes micro spores (haploid male gametophytes) or pollen grain, having gone through meiosis.  Similarly, mega-tracked on the development of ovulation megagametophytes strobili (haploid female gametophyte).  Both gametophytes are short, and at the end of the gametophyte generation of sperm and eggs from the female gametophyte.  Therefore, male cones produce pollen cones and female eggs.  While the plant depends on the sporophyte for nutrition, the female gametophyte remains attached to her before fertilization and seed dispersal.

The production of sperm and eggs is followed by the process of pollination.  Gymnosperm pollination via wind and natural agents.  Here the pollen grains containing sperm are brought to the female gametophyte cones of ovulation wind or insects.  When pollen is carried eggs, the female end of the cone is held for a longer period (ie next year).  For now, the pollen grains germinate to form pollen tubes, which has about a year and make your way to the female gametophyte of fertilization.

The pollen tube delivers sperm to fertilize the egg, which is a sporophyte.  Therefore, the time between pollination and fertilization in gymnosperms quite long, about a year.  This newly created sporophyte is enclosed in a seed into an embryo.  When favorable conditions occur, the extent of late seed separately, and the seeds are dispersed by wind and rain.  Distributed in different places where sporophytes germinate and grow into new plants photosynthetic diploid.  Thus begins life cycle gymnosperms with the mother plant produces spores, which alternates with the gametophyte generation cards.

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