百脉根腋芽分生组织的起源、起始与发育
The origin, initiation and development of axillary shoot meristems in Lotus japonicus.
作者信息
de G Alvarez Nena, Meeking Roydon J, White Derek W R
机构信息
Grasslands Research Centre, AgResearch Private Bag 11008, Palmerston North, New Zealand.
出版信息
Ann Bot. 2006 Nov;98(5):953-63. doi: 10.1093/aob/mcl187. Epub 2006 Oct 3.
BACKGROUND AND AIMS
Lotus japonicus 'Gifu' develops multiple axillary shoots in the cotyledonary node region throughout the growth of the plant. The origin, initiation and development of these axillary meristems were investigated.
METHODS
Morphological, histological and mRNA in situ analyses were done to characterize the ontogeny of cotyledonary axillary shoot meristems in Lotus. Morphological characterization of a putative Lotus shoot branching mutant (super-accessory branches) sac, is presented.
KEY RESULTS
By using expression of an L. japonicus STM-like gene as a marker for meristematic tissues, it was demonstrated that groups of cells maintained in the meristematic state at the cotyledonary axil region coincide with the sites where additional axillary meristems (accessory meristems) form. A Lotus shoot branching mutant, sac, is a putative Lotus branching mutant characterized by increased proliferation of accessory shoots in all leaf axils including the cotyledons.
CONCLUSION
In Lotus, axillary shoot meristems continually develop at the cotyledonary node region throughout the growth of the plant. These cotyledonary primary and accessory axillaries arise from the position of a meristematic zone of tissue at the cotyledonary node axil region.
背景与目的
在整个植株生长过程中，百脉根‘岐阜’在子叶节区域会发育出多个腋芽。对这些腋生分生组织的起源、起始和发育进行了研究。
方法
进行了形态学、组织学和mRNA原位分析，以表征百脉根子叶腋芽分生组织的个体发育。展示了一个假定的百脉根枝条分枝突变体（超级副枝）sac的形态特征。
主要结果
通过使用百脉根STM样基因的表达作为分生组织的标记，证明了在子叶腋区域保持分生状态的细胞群与额外腋生分生组织（副分生组织）形成的部位一致。百脉根枝条分枝突变体sac是一个假定的百脉根分枝突变体，其特征是包括子叶在内的所有叶腋中副枝的增殖增加。
结论
在百脉根中，腋芽分生组织在整个植株生长过程中持续在子叶节区域发育。这些子叶初生和副腋芽起源于子叶节腋区域的一个分生组织带的位置。
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