大麦叶蘖单位
The barley phytomer.
作者信息
Forster Brian P, Franckowiak Jerome D, Lundqvist Udda, Lyon Jackie, Pitkethly Ian, Thomas William T B
机构信息
SCRI, Invergowrie, Dundee DD2 5DA, Scotland, UK.
出版信息
Ann Bot. 2007 Oct;100(4):725-33. doi: 10.1093/aob/mcm183.
BACKGROUND AND AIMS
Morphological mutants have been useful in elucidating the phytomeric structure of plants. Recently described mutants have shed new light on the ontogeny (development of plant structures) and the phytomeric system of barley (Hordeum vulgare). Since the current model for barley phytomers was not adequate to explain the nature of some mutants, a new model is proposed.
METHODS
New phytomer mutants were detected by visual assessment of mutant families in the Optic barley mutation grid population. This was done at various growth stages using laboratory, glasshouse and field screens. Simple explanations were adopted to account for aberrant phytomer phenotypes and a thesis for a new phytomer model was developed.
KEY RESULTS AND CONCLUSIONS
A barley phytomer model is presented, in which the origins of vegetative and generative structures can be explained by a single repeating phytomer unit. Organs on the barley plant are divided into two classes, single or paired, depending on their origin. Paired structures are often fused together to create specific organs. The model can be applied to wheat (Triticum aestivum) and related grasses.
背景与目的
形态突变体在阐明植物的叶元结构方面很有用。最近描述的突变体为大麦（Hordeum vulgare）的个体发育（植物结构的发育）和叶元系统提供了新的线索。由于当前的大麦叶元模型不足以解释某些突变体的本质，因此提出了一个新模型。
方法
通过对Optic大麦突变网格群体中的突变体家族进行视觉评估，检测新的叶元突变体。这在不同生长阶段通过实验室、温室和田间筛选来完成。采用简单的解释来说明异常的叶元表型，并构建了一个新的叶元模型的论点。
关键结果与结论
提出了一个大麦叶元模型，其中营养结构和生殖结构的起源可以用一个单一重复的叶元单元来解释。大麦植株上的器官根据其起源分为两类，单生或成对。成对结构通常融合在一起形成特定的器官。该模型可应用于小麦（Triticum aestivum）和相关禾本科植物。
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