DETERMINATION AND CELL-INTERACTIONS IN REPRODUCTIVE MERISTEMS
DETERMINATION AND CELL-INTERACTIONS IN REPRODUCTIVE MERISTEMS
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DOI：
10.1105/tpc.5.10.1157
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发表时间：
1993-10-01
期刊：
影响因子：
11.6
通讯作者：
SUSSEX, IM
中科院分区：
文献类型：
--
作者：
HUALA, E;SUSSEX, IM
植物体由分裂的细胞群（分生组织）发育而来，分生组织作为永久性干细胞群体发挥作用，使植物在其一生中不断增大体积。虽然所有的分生组织都是分化新细胞的来源，但每种分生组织只能产生特定的结构；例如，茎分生组织产生叶、腋芽、节间和花，而根分生组织只产生根。茎和根同一性的选择发生在新分生组织建立的早期（Christianson and Warnick, 1983），但一个特定的分生组织如何获得和维持其同一性是未知的。虽然分生组织同一性可以在很长一段时间内保持稳定，但它在某些情况下是可以改变的。一个很容易观察到的分生组织特性的变化发生在植物从营养生长到生殖生长的过程中。在此转变之前，来自芽分生组织的细胞分化为叶、节间和腋芽。过渡到生殖生长后，形成花苞片、花序枝和花。通过研究从营养生长到生殖生长的转变，我们希望了解分生组织如何获得和稳定地繁殖身份，以及分生组织在其衍生细胞的发育命运中起什么作用。
The plant body develops from groups of dividing cells, the meristems, that function as permanent stem cell populations and enable the plant to increase in size continuously throughout its lifetime. Although all meristems function as sources of new cells for differentiation, each type of meristem is capable of producing only certain structures; for example, the shoot meristem gives rise to leaves, axillary buds, internodes, and flowers, whereas the root meristem produces only roots. The choice between shoot and root identity occurs very early in the establishment of a new meristem (Christianson and Warnick, 1983), but how a particular meristem acquires and maintains its identity is unknown. Although meristem identity can be stable for long periods of time, it is capable of changing in some circumstances. One easily observed change in meristem identity occurs when plants shift from vegetative to reproductive growth. Before this transition, cells derived from the shoot meristem differentiate as leaves, internodes, and ax-illary buds. After the transition to reproductive growth, floral bracts, inflorescence branches, and flowers are formed. By studying the transition from vegetative to reproductive growth, we hope to understand how a meristem acquires and stably propagates an identity and what role a meristem plays in the developmental fate of its derivative cells.