Inhibition of growth and development of root border cells in wheat by Al.
Inhibition of growth and development of root border cells in wheat by Al.
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DOI：
10.1034/j.1399-3054.2003.00036.x
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发表时间：
2003-03
影响因子：
6.4
通讯作者：
Mu-yuan Zhu;Sung-ju Ahn;H. Matsumoto
中科院分区：
文献类型：
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作者：
Mu-yuan Zhu;Sung-ju Ahn;H. Matsumoto
边界细胞的产生和发育随基因型的不同而不同，它们在小麦根系发育阶段的释放比目前所研究的其他品种要早。在没有铝处理的情况下，耐铝品种阿特拉斯66和铝敏感品种Scout 66的最大边界细胞数无显著差异。Al严重抑制了边界细胞的产生和释放，导致Scout 66的边界细胞聚集，而Atlas 66的边界细胞聚集较少。经Al处理的根释放的边缘细胞数量明显少于未经Al处理的根。Al处理诱导离体边缘细胞死亡，用25微米Al处理20小时后，离体边缘细胞被杀死。无论Al是否存在，Atlas 66和Scout 66离体边缘细胞的存活率没有显著差异。Atlas 66和Scout 66根尖边缘细胞的去除增强了Al诱导的根伸长抑制，同时增加了根中Al的积累。这些结果表明，粘附在根尖上的边缘细胞在小麦根系抗铝损伤中起着潜在的保护作用。
The production and development of border cells vary with genotype, and they are released in wheat at an earlier stage of root development than other species studied so far. No significant difference was observed in the maximum number of border cells between Al-tolerant (Atlas 66) and Al-sensitive (Scout 66) cultivars in the absence of Al treatment. Al seriously inhibited the production and release of border cells, resulting in clumping of border cells in Scout 66, but less clustering in Atlas 66. The number of border cells released from roots treated with Al is significantly less than that from roots grown without Al treatment. Al treatment induced the death of detached border cells in vitro and they were killed by a 20-h treatment with 25 micro m Al. No significant difference in survival percentage of detached border cells was observed between Atlas 66 and Scout 66, regardless of the presence or absence of Al. The removal of border cells from root tips of both Atlas 66 and Scout 66 enhanced the Al-induced inhibition of root elongation concomitant with increased Al accumulation in the root. These results suggest that border cells adhered to the root tips play a potential role in the protection of root from Al injury in wheat.