DEVELOPMENT OF THE SEED AND FRUIT IN RHINANTHUS MAJOR AND R. SEROTINUS
DEVELOPMENT OF THE SEED AND FRUIT IN RHINANTHUS MAJOR AND R. SEROTINUS
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DOI：
10.1002/j.1537-2197.1966.tb14019.x
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发表时间：
1966-08
影响因子：
3
通讯作者：
B. Tiagi
中科院分区：
文献类型：
--
作者：
B. Tiagi
在前后扁平的两室子房的每个室中有7个无柄，弯曲，盘状胚珠。它们在轴胎座上的每个室中交替排列成两行，轴胎座是胚珠所在的结节状胎座。珠心退化早，但合点端的弯曲胚囊，珠被的最内层功能作为内皮。具侵略性的多核珠孔吸器通过珠孔管在胎座中分枝成管状体，而双核合点吸器通过消化大量合点组织而产生大的空间。胚乳分化为三个区域：中间贮藏区、吸器珠孔区和合点区。珠被的厚度由珠被的内皮及其周围的分生组织区显著增加。轮生种子的背面有两个突出的翅，侧面有较小的翅，腹面被一个突出的基体占据。由内皮层形成的角质化的被膜包裹着卵球形的贮藏胚乳。种皮主要由加厚的表皮和内皮组成。胚乳的珠孔和合点端的部分变成褐色的，并用于堵塞种子的两端。胚直，生两片子叶和两片子叶。
There are seven sessile, campylotropous, discoid ovules in each loculus of the anteroposteriorly flattened bilocular ovary. They are arranged alternately in two rows in each chamber on the axile placenta which is nodular where the ovules are borne. Nucellus degenerates early except at the chalazal end of the curved embryo sac, and the inntermost layer of the integument functions as endothelium. The aggressive, multinucleate micropylar haustorium grows as a tubular body through the micropylar canal and ramifies in the placenta while the two-nucleate chalazal haustorium creates a large space by digesting a good deal of the chalazal tissue. Endosperm is differentiated into three regions: the middle storage, the haustorial micropylar, and the chalazal. Thickness of the integument is considerably added to by the endothelium and by its surrounding meristematic zone of the integument. There are two prominent wings on the dorsal and smaller ones on the lateral faces of the cochlidiospermous seed, its ventral face being occupied by a prominent basal body. A heavily cutinized envelope, formed by the endothelium, surrounds the ovoid storage endosperm. Testa of the seed is mainly composed of the thickened epidermis and the endothelium. The micropylar and the chalazal parts of the endosperm become tanniferous and serve to plug the two ends of the seed. Embryo is straight, and it bears two cotyledons and two plumular leaves.