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Of of Huaihua and Liuyang wild Houttuynia (Herba Houttyniae) Reproductive Biology , the study includes characteristics of flower , flower bud , pollen development , pollen viability , Megasporogenesis the female gametophyte development and mechanism of seed abortion . The results are as follows : ( 1 ) Houttuynia for bisexual flowers Cross corolla , stamens 3 , longer than the ovary , filaments lower part of the ovary Hopson ; stamens 3 , the lower part of connate carpels , ovary superior , anther diastema . Observe of Houttuynia developmental sequence and characteristics of flower bud differentiation process is divided into eight periods : the period of vegetative growth cone growth cone elongation , floret primordium formation , petal differentiation stage of stamen formation , carpel formation anther differentiation stage, tetrad formation . (2) \(3) experimental observation I 2 -IK solution staining pollen germination and very low found Houttuynia pollen vitality , pollen viability after the period of the mononuclear tend to zero Houttuynia pollen occurred abortion. (4 ) Houttuynia stamens 3 , was born in the ovary around . The carpel 3 Hopson . The Parietales straight and ovule , bunk beads , beads hole straight , from the inside and outside beads constitute embryo sac development Polygonum type . Houttuynia development to eight nuclear period , appeared to stop the growth of the phenomenon , and found no fertilization phenomenon and the original embryo , embryo sac development , early degradation of antipodal cells . ( 5 ) male sterility cause the Houttuynia seed abortion the most direct internal reasons . Houttuynia male sterility is due to the small spores exception occurs , the formation of pollen sterility , not mature pollen germination ability caused . While pollen abortion because the tapetum exception nutrients stranded in tapetum cells , without transportation to the microspore mother cells , lack of nutrition small spores , causing small spores abortion , fish fishy grass pollen abortion belong to a single sterile type .
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