求生物文献翻译：
RESULTSThefirstrecognizableeventintheprocessofsporogenesiswasthedifferentiationofatet...
RESULTS
The first recognizable event in the process of sporogenesis was the differentiation of a tetrahedral cell within the globular extremity of the short, stalked sporangium (Plate 1 A, inset). This cell resembled a meristematic cell in its cytology, being less vacuolate than the surrounding sporangial wall cells, and it provided the initial from which all the sporo-genous and tapetal cells were formed. Free ribosomes were found in abundance in this and all the cells formed prior to meiosis (Plate 1 A), but dictyosomes and endoplasmic reticulum were very infrequent. The mitochondria were round or oval in profile, contain-ing ribosomes and short, inflated, finger-like villi (Plate 1 A). They measured, on average, 0-5 fim in width and 1-5 fim in length, the only departure from this form being the elon-gated and often branched mitochondria characteristic of the cell generation preceding the spore mother cells (Plate 1 B). Profiles showing median constrictions of mitochondria were also occasionally seen, suggesting the possible division of the organelles.
The ovoid plastids in these cells contained no recognizable grana, but commonly con-tained three or four separate thylakoids and two or three prominent plastoglobuli (Plate 1 A, B). Starch grains were only rarely found in these organelles, but phytoferritin of the dispersed form (Sheffield and Bell, 1978) was invariably present, isolated molecules being distributed throughout the matrix (see, for example Plate 1 A, arrows). The thin walls bounding all the sporogenous cells preceding meiosis (01 jim or less in total width, Plate 1 B) were perforated at frequent intervals by plasmodesmata.
The spore mother cells formed by the last mitotic division were distinguished by con-siderable vesicular activity. Numerous profiles were evident which indicated compart-mentalization within the cytoplasm (Plate lc). The profiles of these regions became in-creasingly complex, often coming to contain several layers of cytoplasm (Plate 1 D) as 展开
The first recognizable event in the process of sporogenesis was the differentiation of a tetrahedral cell within the globular extremity of the short, stalked sporangium (Plate 1 A, inset). This cell resembled a meristematic cell in its cytology, being less vacuolate than the surrounding sporangial wall cells, and it provided the initial from which all the sporo-genous and tapetal cells were formed. Free ribosomes were found in abundance in this and all the cells formed prior to meiosis (Plate 1 A), but dictyosomes and endoplasmic reticulum were very infrequent. The mitochondria were round or oval in profile, contain-ing ribosomes and short, inflated, finger-like villi (Plate 1 A). They measured, on average, 0-5 fim in width and 1-5 fim in length, the only departure from this form being the elon-gated and often branched mitochondria characteristic of the cell generation preceding the spore mother cells (Plate 1 B). Profiles showing median constrictions of mitochondria were also occasionally seen, suggesting the possible division of the organelles.
The ovoid plastids in these cells contained no recognizable grana, but commonly con-tained three or four separate thylakoids and two or three prominent plastoglobuli (Plate 1 A, B). Starch grains were only rarely found in these organelles, but phytoferritin of the dispersed form (Sheffield and Bell, 1978) was invariably present, isolated molecules being distributed throughout the matrix (see, for example Plate 1 A, arrows). The thin walls bounding all the sporogenous cells preceding meiosis (01 jim or less in total width, Plate 1 B) were perforated at frequent intervals by plasmodesmata.
The spore mother cells formed by the last mitotic division were distinguished by con-siderable vesicular activity. Numerous profiles were evident which indicated compart-mentalization within the cytoplasm (Plate lc). The profiles of these regions became in-creasingly complex, often coming to contain several layers of cytoplasm (Plate 1 D) as 展开
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结果
在第一个可辨认的事件的过程是一sporogenesis细胞的分化程度的球状星团内的四面体穷途末路的短,悄悄的孢子囊(1个,镶板)。这些细胞具有分生能力的细胞在它像一位细胞学、不vacuolate比周围的sporangial壁细胞,它提供了初步的各个sporo-genous与绒毡层细胞的形成。核糖体被发现大量免费在这个和所有的细胞减数分裂形成前(1),但板与内质网dictyosomes非常罕见。线粒体是呈长椭圆形或圆形,侧面,contain-ing核糖体和短,膨胀,finger-like绒毛(1)板。他们测量,平均来看,0 - 1 - 5,在广度和126 126长,唯一的背离这个形式,而且常常是elon-gated细胞的线粒体特点分枝产生孢子母细胞(前板1 B)。constrictions剖面显示线粒体中也可能偶然看到,这组的细胞器。
这些细胞的卵圆形的质体包含不辨认基粒,但一般con-tained三个或四个分开的类囊体和两个或三个方面的突出plastoglobuli(板1 A,B)。只有很少发现淀粉粒在这些细胞器的分散,但phytoferritin形式(谢菲尔德并且贝尔,1978年),一直存在,孤立的分子被分配到整个矩阵(见,例如板1个,箭头)。所有的薄墙,造孢细胞包围前减数分裂(01吉姆或更少,在总宽度、板1乙),穿孔在隔一小会儿的胞间连丝。
孢子母细胞有丝分裂形成,由去年由con-siderable泡状活动中都是杰出的。这表明许多剖面进行明显compart-mentalization板内细胞质(lc)。这些地区的简介变得复杂,往往in-creasingly来包含若干层板的细胞质(D)为1
在第一个可辨认的事件的过程是一sporogenesis细胞的分化程度的球状星团内的四面体穷途末路的短,悄悄的孢子囊(1个,镶板)。这些细胞具有分生能力的细胞在它像一位细胞学、不vacuolate比周围的sporangial壁细胞,它提供了初步的各个sporo-genous与绒毡层细胞的形成。核糖体被发现大量免费在这个和所有的细胞减数分裂形成前(1),但板与内质网dictyosomes非常罕见。线粒体是呈长椭圆形或圆形,侧面,contain-ing核糖体和短,膨胀,finger-like绒毛(1)板。他们测量,平均来看,0 - 1 - 5,在广度和126 126长,唯一的背离这个形式,而且常常是elon-gated细胞的线粒体特点分枝产生孢子母细胞(前板1 B)。constrictions剖面显示线粒体中也可能偶然看到,这组的细胞器。
这些细胞的卵圆形的质体包含不辨认基粒,但一般con-tained三个或四个分开的类囊体和两个或三个方面的突出plastoglobuli(板1 A,B)。只有很少发现淀粉粒在这些细胞器的分散,但phytoferritin形式(谢菲尔德并且贝尔,1978年),一直存在,孤立的分子被分配到整个矩阵(见,例如板1个,箭头)。所有的薄墙,造孢细胞包围前减数分裂(01吉姆或更少,在总宽度、板1乙),穿孔在隔一小会儿的胞间连丝。
孢子母细胞有丝分裂形成,由去年由con-siderable泡状活动中都是杰出的。这表明许多剖面进行明显compart-mentalization板内细胞质(lc)。这些地区的简介变得复杂,往往in-creasingly来包含若干层板的细胞质(D)为1
参考资料： 在线翻译
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