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Study on Floral Dynamic and Sexual Reproduction of Swertia mileensis, a Rare and Endemic Medicinal Plant

青叶胆开花动态及有性生殖特征的解剖学研究



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therwalinthetimeofsecondarysporoginouscel:epidermis(EP),outlayer(OL)andinnerlayer(IL)withitsdivisionphase;D.
Antherwalinthetimeofmicrosporemothercels:epidermis(EP),endothelium(EN),middlelayer(M),tapetum(T);E.“Pla
centoid(PL)”fromthetapetum;F.MeiosismetaphaseⅠ;G.MeiosisanaphaseⅠ;H.MeiosismetaphaseⅡ;I.Meiosistelophase
Ⅱ;J.“Placentoid(PL)”fromthetapetuminthetimeoftetrads;K.Microsporehadjustformedfrommicrosporetetrads;L.Some
smalvacuolesappearinthemicrospore;M.Vacuolateperiodofuninucleatemicrospore;N.Early2celedpolens,showingobvious
celwal;O.Mature3celedpolens
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