八倍体小黑麦籽粒发育形态学观察

THE MOPHOLOGICAL OBSERVATJON ON THE DEVELOPING GRAIN OF8x TRITICALE

八倍体小黑麦籽粒发育形态学包括三部分:胚乳发育、胚发育和籽实皮发育。胚乳发育的全过程分为4个时期,即初生胚乳核分裂期(开花后5～6小时)、游离核增殖期(开花后6～96小时)、胚乳组织形成期(开花后4～6天)和胚乳形态建成期(开花后6～30天)。胚发育包括合子分裂期(开花后22～28小时)、原胚期(开花后1～9天)、器官分化期(开花后10～19天)和器官形态建成期(开花后19～25天)。籽实皮的发育包括已经发育成的果皮和种皮两个部分。

The developing grain .mophology of 8x tritioale consists of th-ree parts: The development of endosperm, the development of the embryo a-nd the development of the pericarp. The whole process of the endosperm development can be divided into 4 phases: The primary endosperm nucleous d?ivision (5-6 hrs after anthesis) ; The multiplication of the free nuclei (6-96 hrs after anthesis) 5 the formation of the endosperm tissue (4-6 days a-fter anthesis) and the mophological establishment of the endosperm (6-30 days after anthesis) .The development of the embryo consists of the divisi-on of the zygote (22-28 hrs after anthesis), the differentiations of embryo (10-19 days after anthesis) and the mophological establishment of organ (19-25 days after anthesis) .The development of pericarp incluoes two p-arts of the developed fruit coats and seed coats.