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首页> 外文期刊>Mycologia >GROWTH DYNAMICS IN CLADONIA GRAYI
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GROWTH DYNAMICS IN CLADONIA GRAYI

机译：克拉多尼亚州的生长动力学

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摘要

The erect secondary thallus (podetium) of the lichen Cladonia grayi develops in distinct stages that can be traced to the development of its fungal meristem tissue. In early ontogeny, while the contiguous meristem grows unilaterally both outward and vertically, the gross morphology of the podetium resembles other cup-forming species. In later ontogeny, when the divided meristem grows vertically, the podetium forms a subtly articulated spiral. The spiral growth form is most apparent in branching proliferations that grow along the cup margin. The meristem tissue at the apex of these proliferations is curved, maturing sequentially in a spiral pattern. The proliferations curve in a spiral around the vertical axis of the podetium. Apothecia at the apex of proliferations curve in a similar manner. Evidence for spiral growth along the cup margin can also be inferred from the sequential development of pycnidia that emerge from it. Similar to early land plants, the growth dynamics of C. grayi may represent an evolutionary advance from an orthotropous growth pattern to a branched, photosynthetic thallus. [References: 21]
机译：地衣Cladonia grayi的直立次生丘脑（po）发育的不同阶段可以追溯到其真菌分生组织的发育。在早期个体发育中，虽然连续的分生组织向外和垂直单侧生长，但the的总体形态类似于其他形成杯的物种。在后来的个体发育中，当分裂的分生组织垂直生长时，裙楼形成一个微妙的铰接螺旋。螺旋生长形式在沿着杯缘生长的分支扩散中最为明显。这些增殖的顶点处的分生组织是弯曲的，以螺旋状顺序成熟。扩散曲线围绕裙楼的垂直轴呈螺旋状。增殖顶点处的萎缩症以类似方式弯曲。沿杯缘螺旋状生长的证据也可以从由此产生的吡虫病的顺序发展中推断出来。与早期的陆地植物相似，灰色隐孢子虫的生长动态可能代表了从正交生长模式向分支的光合all的进化进展。 [参考：21]

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