Junghans U, Langenfeld-Heyser R, Polle A, Teichmann T
Forstbotanisches Institut, Georg-August-Universität Göttingen, Göttingen, Germany.
Plant Biol (Stuttg). 2004 Jan-Feb;6(1):22-9. doi: 10.1055/s-2003-44712.
The influence of the auxin transport inhibitors naphthylphthalamic acid (NPA) and methyl-2-chloro-9-hydroxyflurene-9-carboxylate (CF), as well as the gaseous hormone ethylene on cambial differentiation of poplar was determined. NPA treatment induced clustering of vessels and increased vessel length. CF caused a synchronized differentiation of cambial cells into either vessel elements or fibres. The vessels in CF-treated wood were significantly smaller and fibre area was increased compared with controls. Under the influence of ethylene, the cambium produced more parenchyma, shorter fibres and shorter vessels than in controls. Since poplar is the model tree for molecular biology of wood formation, the modulation of the cambial differentiation of poplar towards specific cell types opens an avenue to study genes important for the development of vessels or fibres.
测定了生长素运输抑制剂萘基邻苯二甲酸（NPA）和甲基-2-氯-9-羟基芴-9-羧酸酯（CF）以及气态激素乙烯对杨树形成层分化的影响。NPA处理诱导了导管的聚集并增加了导管长度。CF导致形成层细胞同步分化为导管分子或纤维。与对照相比，经CF处理的木材中的导管明显更小，纤维面积增加。在乙烯的影响下，形成层产生的薄壁组织比对照更多，纤维和导管更短。由于杨树是木材形成分子生物学的模式树种，将杨树形成层分化调节为特定细胞类型为研究对导管或纤维发育重要的基因开辟了一条途径。
