The REVOLUTA gene is necessary for apical meristem development and for limiting cell divisions in the leaves and stems of Arabidopsis thaliana.
The REVOLUTA gene is necessary for apical meristem development and for limiting cell divisions in the leaves and stems of Arabidopsis thaliana.
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发表时间：
1995-09
期刊：
影响因子：
4.6
通讯作者：
P. Talbert;H. T. Adler;David W. Parks;L. Comai
中科院分区：
文献类型：
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作者：
P. Talbert;H. T. Adler;David W. Parks;L. Comai
种子植物的形态由许多分生组织的生长决定，包括顶端分生组织、叶分生组织和形成层。我们研究了 REVOLUTA 基因的五个隐性突变等位基因，该基因是促进拟南芥顶端分生组织生长并限制叶和茎细胞分裂所必需的。 REVOLUTA 映射到第五条染色体的底部。 revoluta 突变体的 paraclades（腋芽）和花的顶端分生组织经常无法完成正常发育并形成不完整或败育的结构。初生枝顶端分生组织有时也会提早阻止发育。相比之下，叶子、茎和花器官却长得异常大。我们发现，在叶表皮中，这种额外的生长是由于叶基部分生组织中的额外细胞分裂造成的。叶子生长的程度与叶腋中旁枝的发育呈负相关。增厚的茎含有额外的细胞层，排列成环状，表明它们可能是由形成层状分生组织产生的。这些结果表明REVOLUTA基因在调节拟南芥中顶端和非顶端分生组织的相对生长中发挥作用。
The form of seed plants is determined by the growth of a number of meristems including apical meristems, leaf meristems and cambium layers. We investigated five recessive mutant alleles of a gene REVOLUTA that is required to promote the growth of apical meristems and to limit cell division in leaves and stems of Arabidopsis thaliana. REVOLUTA maps to the bottom of the fifth chromosome. Apical meristems of both paraclades (axillary shoots) and flowers of revoluta mutants frequently fail to complete normal development and form incomplete or abortive structures. The primary shoot apical meristem sometimes also arrests development early. Leaves, stems and floral organs, in contrast, grow abnormally large. We show that in the leaf epidermis this extra growth is due to extra cell divisions in the leaf basal meristem. The extent of leaf growth is negatively correlated with the development of a paraclade in the leaf axil. The thickened stems contain extra cell layers, arranged in rings, indicating that they may result from a cambium-like meristem. These results suggest that the REVOLUTA gene has a role in regulating the relative growth of apical and non-apical meristems in Arabidopsis.