It has leaf primordia and a shoot apex.
叶特化成为具有锋利尖端的结构。
At the appearance of the eighth leaf primordia, SAM formed a bulge and had more cells.
至第八对叶原基产生后，茎端分生组织才稍微隆起，细胞数目增多。
The procambium continuously develop to the apex after it arises from the place where the leaf primordia originates from below the apical meristem.
原形成层在顶端分生组织之下叶原基起源的地方发生。
The number of leaf primordia was affected by both genotype and environment, while the Numbers of bracteal, spikelet and floret primordia were affected mainly by environmental factors.
叶原基数由基因型和环境条件共同决定，而苞叶原基、小穗原基和小花原基数以环境因子的影响为主。
The expression pattern and mutant phenotype suggest that the PLA1 gene acting in developing leaf primordia affects the timing of successive leaf initiation and the termination of vegetative growth.
PLA1的表达模式和突变表型表明PLA1在发育中的叶原基中行使功能，影响叶片起始发育的时间以及营养生长的终止。
The expression pattern and mutant phenotype suggest that the PLA1 gene acting in developing leaf primordia affects the timing of successive leaf initiation and the termination of vegetative growth.
PLA1的表达模式和突变表型表明PLA1在发育中的叶原基中行使功能，影响叶片起始发育的时间以及营养生长的终止。
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