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《Bulletin of Botanical Research》 2006-05
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The structure and development of sporoderm of Lepisorus thunbergianus(Kaulf.) Ching(Polypodiaceae)

DAI Xi-Ling~(1,2) CAO Jian-Guo~1 WANG Quan-Xi~(1*) ZHU Rui-Liang~2(1.Life and Environment Science College,Shanghai Normal University,Shanghai 200034)(2.College of Life Science,East China Normal University,Shanghai 200062)  
The structure and development of sporoderm of the fern Lepisorus thunbergianus(Kaulf.) Ching(Polypodiaceae)are studied by means of light microcope(LM),scanning electron microscope(SEM) and transmission electron microscope(TEM).The results as follow: the mature spores of Lepisorus thunbergianus(Kaulf.) Ching are bilateral and monolete and show an undulate ornamentation.The sporoderm consists of endospore,exospore and perispore from the inside to the outside.The exospore is derived from the tapetal materials.It is composed of two layers,i.e.the outer layer and inner layer of exospore.The undulate ornamentation in the surface of outer layer of exospore forms the outline of ornamentation.The perispore is very thin and adhere closely to the exospore surface.It is formed by two layers of lamellae.Many glubules appear on the surface of spore in the stage of exspore formation.In the present paper the structure,origin and development of the spore wall are discussed.The results will provide basic information for the palynology and phylogeny of ferns.
【Fund】: 国家自然科学基金资助(No.30270088)
【CateGory Index】: Q944
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