Structure and development of fruits and seeds of weed species of Euphorbiaceae
Structure and development of fruits and seeds of weed species of Euphorbiaceae
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DOI：
10.1590/s0102-33062012000100005
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发表时间：
2012-03-01
影响因子：
1.1
通讯作者：
Albiero, Adriana Lenita Meyer
中科院分区：
文献类型：
--
作者：
Gagliardi, Karina Bertechine;Rosado, Aline;Albiero, Adriana Lenita Meyer
(大戟科杂草种的果实和种子的结构和发育)。大戟科植物大戟科呈现几种形态类型的水果，其中分果是最常见的。草本植物一品红、异叶一品红、粗毛一品草的果实。Millsp.)和一品红(=Chamaesyce prostrata(Aiton)mall)是本研究的对象。花序和发育中的果实采集在巴西马里加州立大学(UEM)的校园里，固定在FAA50和戊二醛中，根据标准的形态和解剖技术，脱水并用旋转切片机切片。该种在解剖学上表现出几个相似之处，尽管在卵巢的外表皮上有一些差异，在禾本科植物中是无毛的，在其他物种中是有毛的。成熟果实具乳头状外果皮，除粗毛外无毛。胚珠倒生，双珠被，厚珠心；种子外胚层，胚直。
(Structure and development of fruits and seeds of weed species of Euphorbiaceae). Euphorbiaceae s.l. presents several morphological types of fruits, of which the schizocarp is the most common. The fruits of weed species of Euphorbia graminea Jacq., Euphorbia heterophylla L., Euphorbia hirta L. (= Chamaesyce hirta (L.) Millsp.) and Euphorbia prostrata Aiton (= Chamaesyce prostrata (Aiton) Small) are objects of this study. Inflorescences and fruits in development were collected on the campus of the State University of Maringa (UEM), Brazil, fixed in FAA 50 and glutaraldehyde, dehydrated and sectioned with a rotary microtome according to standard morphology and anatomy techniques. The species present several anatomical similarities, though there are some differences related to the outer epidermis of the ovaries, which is glabrous in E. graminea and hairy in the other species. The ripe fruits present a papilose exocarp and lack trichomes, except for E. hirta. The ovules are anatropous, bitegmic and crassinucellate; the seeds are exotegmic and the embryos are straight.