Growth and Development of Young Roots of Barley (Hordeum vulgare L.) Genotypes
Growth and Development of Young Roots of Barley (Hordeum vulgare L.) Genotypes
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大麦（Hordeum vulgare L.）基因型幼根的生长和发育
DOI：
10.1006/anbo.1995.1055
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发表时间：
1995
期刊：
影响因子：
4.2
通讯作者：
Peter J. Gregory
中科院分区：
文献类型：
--
作者：
A. Wahbi;Peter J. Gregory
摘要大麦(Hordeum visgare L.)来自地中海气候国家的基因在温控温室营养液中生长，以确定其他工作者发现的根分枝和生长的协调是否适用于多达14种基因类型。不同的基因型产生的精轴数量有很大的差异，从Hoshimasari和Swaneck的大约7个到Gerbel‘B’的大约4个。节轴数目与叶片数呈线性关系，一般需要1~2片主茎叶片才能出现节轴。每片叶片产生的轴数有较小的遗传差异，在1.5~2.3之间。侧根的产生和生长是协调的，因此侧根的平均长度随着时间的推移而增加。与其他类型相比，地方品种(阿拉伯Abiad和阿拉伯Aswad)侧根生长更多，伸长速度更快。初生根和次生根的长度和个数呈线性相关，但这种关系没有明显的遗传差异。在整个3~5叶期，初生侧根长度的增长速度快于次生侧根。根重与植株总重的比值随时间的延长而降低，但在此范围内的差异很小。
Abstract Barley (Hordeum vulgare L.) genotypes from countries with a Mediterranean climate grown in temperature-controlled glasshouse in nutrient solution to determine whether the co-ordination of root branching and growth found by other workers applied to a wider of up to 14 genotypes. There was substantial variation in the number of seminal axes produced by the genotypes, ranging from about seven for Hoshimasari and Swanneck to about four for Gerbel 'B'. The number of nodal axes was linearly related to the number of leaves and typically between one and two mainstem leaves were required before nodal axes appeared. There were small genotypic differences in the number of axes produced per leaf with values ranging from 1·5 to 2·3. The production and growth of lateral roots were coordinated so that the mean length of laterals generally increased with time. Landraces (Arabic abiad and Arabic aswad) produced more lateral roots with a faster rate extension compared with other genotypes. The length and number of primary and secondary lateral roots were related linearly, but no genotypic differences in this relation were evident. Length of primary lateral roots increased more rapidly than that of secondary lateral roots throughout the three to five leaf stage. The ratio of root weight to total plant weight decreased with time but there were only small differences within this range of genotypes.