GYMNOSPERMS

– Medium sized trees and shrubs.

– Main plant body Sporophyte.

– In some members roots may have fungal association called Mycorrhiza.

– In some (Cycas) coralloid roots present having algal zone with N2-fixingsymbioticalgae.

Root – taproot and leaves of two types –  1)Foliage 2)Sporophylls.

– Microsporophyll bears sporangia where microspores are formed.

– Megasporophyll bearsovules.

– Compact arrangement of Sporophylls is calledConeand loose one iscalled Strobilus.

– Microspore i.e. pollens reaches to ovules.

– Pollen tubes help to transfer male gametes up to egg of archegonia present in female gametophyte of ovule.

– Zygote develops in an embryo inside seed

-e.gCycas, Pinus ,Cedrusetc.


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