Relationships between cambial activity, cell differentiation and the localization of starch in storage tissues around the cambium in locally heated stems of Abies sachalinensis (Schmidt) Masters
Relationships between cambial activity, cell differentiation and the localization of starch in storage tissues around the cambium in locally heated stems of Abies sachalinensis (Schmidt) Masters
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DOI：
10.1007/s00468-002-0231-1
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发表时间：
2003-05-01
影响因子：
2.3
通讯作者：
Kubo, T
中科院分区：
文献类型：
--
作者：
Oribe, Y;Funada, R;Kubo, T
在冷温带，研究了万年青针叶树高山冷杉（Abies sachalinensis（施密特）Masters）在形成层休眠期间和形成层自然复活后形成层细胞分裂的程度、形成层衍生物的分化程度以及形成层周围贮藏淀粉的定位。在形成层休眠期间，在局部加热的茎区域，加热诱导形成层的局部再激活。然而，在加热和重新激活的形成层中的细胞在仅产生几个细胞后不久就停止分裂。此外，没有观察到木质部的分化和形成层周围贮藏组织中淀粉的消失。在形成层自然复活后局部加热的茎区域，细胞分裂在形成层和早材管胞中继续进行，形成了具有大径向直径和次生壁的早材管胞，形成层周围的储存组织中具有丰富的淀粉。我们的研究结果表明，在形成层和细胞分化的细胞分裂的程度取决于在形成层周围的存储组织中的淀粉量在本地加热的茎生长在冷温带的万年青针叶树。
A study was made, in a cool-temperate zone, of the extent of cell division in the cambium, the extent of differentiation of cambial derivatives, and the localization of storage starch around the cambium in locally heated (22-26degreesC) stems of the evergreen conifer Abies sachalinensis (Schmidt) Masters during cambial dormancy and immediately after natural reactivation of the cambium. In locally heated regions of stems during cambial dormancy, heating induced localized reactivation of the cambium. However, the cells in the heated and reactivated cambium stopped dividing soon after only a few cells had been generated. In addition, no differentiation of the xylem and the disappearance of starch from storage tissues around the cambium were observed. In regions of stem that had been locally heated after natural reactivation of the cambium, cell division continued in the cambium and earlywood tracheids with a large radial diameter and secondary walls were formed, with abundant starch in the storage tissues around the cambium. Our results suggest that the extent of both cell division in the cambium and cell differentiation depends on the amount of starch in storage tissues around the cambium in the locally heated stems of an evergreen conifer growing in a cool-temperate zone.