2015 Fiscal Year Final Research Report
Developmental morphology of branching system in the roots of lycophytes
| Project/Area Number |
25870088
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Morphology/Structure
Evolutionary biology
|
|---|
| Research Institution | Japan Women's University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Keywords | 小葉類 / 根 / 進化 / 根頂端分裂組織 / 分枝 / 維管束植物 / 静止中心 |
|---|
| Outline of Final Research Achievements |
Lycophytes are the basal clade of extant vascular plants and are key for clarifying the evolution of three main organs of vascular plants: stem, leaf, and root. To assess the evolutionary origin of roots and shoots in vascular plants, we examined the root apical meristem (RAM) organization, and root and shoot branching system in lycophytes. The present results suggested that RAM organizations of lycophytes are much more diverse than expected. It is assumed that RAM organizations parallely evolved in the both clades, lycophytes and euphyllophytes. The Lycopodium clavatum RAM has a large group of common initial cells which is similar to the quiescent center of angiosperm RAM. When this RAM branched, the quiescent center like area was divided in two, and two new RAMs formed. The roots of L. clavatum divide dichotomously. In contrast, the branching of shoots of L. clavatum was monopodial system. Thus, the root and shoot of lycophytes are different in branching system.
|
| Free Research Field |
植物形態学
|
