Phosphate Availability Alters Lateral Root Anatomy and Root Architecture of Fraxinus mandshurica Rupr. Seedlings
Phosphate Availability Alters Lateral Root Anatomy and Root Architecture of Fraxinus mandshurica Rupr. Seedlings
复制标题
磷酸盐的可用性改变了水曲柳的侧根解剖结构和根结构。
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Zhengquan Wang
中科院分区：
文献类型：
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作者：
Chu Wu;Xing Wei;Hai;Zhengquan Wang
植物已经进化出一些机制来最大化磷的吸收效率，根构型的改变就是其中之一。当水曲柳。与高磷条件下相比，低磷条件下生长的幼苗侧根分生区细胞长度较长，而伸长区和成熟区细胞长度较短。初生根的伸长速率随磷素供应量的增加而增加，但初生根分枝区的伸长速率则随磷素供应量的增加而降低。侧根原基数目和侧根长度随磷素供应量的增加而减少。拓扑指数（海拔斜率）下降，磷的可用性增加，表明根构型往往是人字形幼苗生长条件下，低磷可用性。人字形根系利用养分的效率更高，但它们的建设成本高于具有分支模式的根系。
Plants have evolved some mechanisms to maximize the efficiency of phosphorus acquisition.Changes in root architecture are one such mechanism. When Fraxinus mandshurica Rupr. seedlings were grown under conditions of low phosphorus availability, the length of cells in the meristem zone of the lateral roots was longer, but the length of cells in the elongation and mature zones of the lateral roots was shorter,compared with seedlings grown under conditions of high phosphorus availability. The elongation rates of primary roots increased as phosphorus availability increased, but the elongation rates of the branched zones of the primary roots decreased. The number of lateral root primordia and the length of the lateral roots decreased as phosphorus availability increased. The topological index (altitude slope) decreased as phosphorus availability increased, suggesting that root architecture tended to be herringbone-like when seedlings were grown under conditions of low phosphate availability. Herringbone-like root systems exploit nutrients more efficiently, but they have higher construction costs than root systems with a branching pattern.