Stem cell populations in meristematic tissues at distinct locations in the plant body provide the potency of continuous plant growth. Primary meristems, at the apices of the plant body, contribute mainly to the elongation of the main plant axes, whereas secondary meristems in lateral positions are responsible for the thickening of these axes. The stem cells of the vascular cambium-a secondary lateral meristem-produce the secondary phloem (bast) and secondary xylem (wood). The sites of primary and secondary growth are spatially separated, and mobile signals are expected to coordinate growth rates between apical and lateral stem cell populations. Although the underlying mechanisms have not yet been uncovered, it seems likely that hormones, peptides, and mechanical cues orchestrate primary and secondary growth. In this review, we highlight the current knowledge and recent discoveries of how cambial stem cell activity is regulated, with a focus on mobile signals and the response of cambial activity to environmental and stress factors.

中文翻译：

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形成层干细胞活性的动力学

植物体内不同位置的分生组织中的干细胞群提供了植物持续生长的能力。位于植物体顶端的初级分生组织主要有助于植物主轴的伸长，而横向位置的次级分生组织负责这些轴的增厚。维管形成层的干细胞——一种次生侧分生组织——产生次生韧皮部（​​韧皮）和次生木质部（木）。初级和次级生长的位点在空间上是分开的，移动信号有望协调顶端和侧部干细胞群之间的生长速度。尽管尚未发现潜在的机制，但激素、肽和机械线索似乎协调了初级和次级生长。在这次审查中，