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Morphological development of artichoke: focus on the subterranean system

机译:朝鲜蓟的形态学发展:专注于地下系统

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摘要

The classification of the subterranean system of globe artichoke, which implies the formation of a monopolar branching system, is not fully understood. This study evaluated the ontogeny of the underground system of the species with the purpose of identifying the type of the subterranean organ and contributing to its morphological description. Plants were evaluated considering the dynamics of aerial and subterranean dry matter at 7,14, 21, 42, 63, 84,105,126,147,168 and 189 days after seedling emergence. Samples, collected from the primary root, were processed according to the usual method. The cotyledonary bud did not play a role in the underground formation and the plumule gives rise to the first stem branching system, indicating a bipolar branching system, with no rhizome formation. The anatomical analysis of the subterraneous system indicated the presence of root structure, with a vigorous axial root originated from the embryo radicle. The first vascular elements originate from the outer part ofthe cylinder and mature toward the center of the axis, forming the metaxylem, in centripetal maturation, which is a root rather than a stem trait. Considering the facts above, the globe artichoke has a subterraneous system formed by an axial root and lower-order roots, without rhizome formation, as previously described in the literature for this species.
机译:朝鲜蓟地下系统的分类,这意味着单极分支系统的形成,还没有被完全理解。这项研究评估了该物种的地下系统的个体发育,目的是识别地下器官的类型并对其形态进行描述。在幼苗出苗后的7,14,21,42,63,84,105,126,147,168和189天时考虑空中和地下干物质的动力学来评估植物。从原根收集的样品按照常规方法进行处理。子叶芽在地下形成中不起作用,并且胚芽产生第一个茎分支系统,表明是双极分支系统,没有根茎形成。地下系统的解剖学分析表明存在根结构,有力的轴向根源于胚根。第一个血管元素起源于圆柱体的外部,并朝着轴的中心成熟,在向心成熟时形成了后木质部,这是根而不是茎的特征。考虑到上述事实,朝鲜蓟具有由轴根和低阶根形成的地下系统,而没有根茎形成,如先前在该物种的文献中所述。

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