In the spring of the year following pollination

In the spring of - ,eventscometogether:Theeggsinthetwo (polyembryony, . seed.

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In the spring of the year following pollination, events come together: The eggs in the two  to three archegonia are fertilized (polyembryony), and development of the new  sporophytic generation begins. Normally only one embryo survives to maturity in the  seed. The pine seed consists of tissues from two sporophyte and one gametophyte  generation. That is, the parent 2  n  sporophyte tissue remains in the seed as the seed  coat (mature integuments); the embryo is the new 2  n  sporophyte, which is surrounded  by the 1  n  megagametophyte. Sometime during the summer of the year following  pollination the seed matures and is shed. If it germinates in a suitable habitat, a new  tree grows to initiate still another cycle.  Other conifers. Not all of the conifers resemble the needle-leaved pines in appearance  or length of time to complete the sexual reproductive cycle—most take only a year. 
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This note was uploaded on 11/14/2011 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.

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