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首页> 外文期刊>日本作物學會紀事 >Studies on Growth and Function of Root System in Tea Plants : II. Root system analysis by the root-age classification technique
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Studies on Growth and Function of Root System in Tea Plants : II. Root system analysis by the root-age classification technique

机译：茶叶植物根系的生长和功能研究：II。根末分类技术分析

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A new technique was explored for classifying roots according to their ages, and it was applied for the analysis of root system development of the 1-to 7-year-old clonal tea plants (Camellia sinensis (L.) O. Kuntze cv. Yabukita) grown under field conditions. In the technique, the root ages were expressed progressively as Age I, Age II etc., by the number of annual rings, which were easily detected by staining cross sections of the roots with phloroglucinol-alcohol solution. Total root weight increased almost linearly with plant age. Annual increase of root dry weight amounted to about 110g per plant from the third to the seventh year after planting. The quantitative ratio of white roots, which are superior in nutrient absorption and biosynthesis of amino acids, maintained the highest ratio throughout every plant age examined. This suggests importance of white roots to plant growth and green tea quality. In contrast, Age III and IV roots occupied the smallest percentage among total roots. Roots that were formed within 3 years after planting continued to grow in the successive years. Most of those that were formed later in 4 or 5 years after, however, failed to grow in the successive years. Consequently, it is considered that growth of roots which were formed during the younger plant ages is of great importance for the formation of tea root system.
机译：探索了一种根据年龄进行分类根系的新技术，应用于1至7岁的克隆茶叶植物的根系开发分析（Camellia Sinensis（L.）O. Kuntze CV。Yabukita ）在现场条件下成长。在该技术中，通过年龄I，Age II等，通过年龄次数逐渐表达根代，通过用甘黄油醇溶液染色横截面来易于检测。植物时代几乎线性增加了根系重量。从种植后第三年到第七年度，根系干重的年增长的年增长率约为110克。白色根部的定量比在营养物吸收和氨基酸生物合成中，在每个植物时代的营养中保持最高比率。这表明白根对植物生长和绿茶品质的重要性。相比之下，年龄III和IV根占总根源中最小百分比。在种植后3年内形成的根源在连续年内继续增长。然而，大多数在4到5年后形成的大多数未来在连续年份未能增长。因此，认为植物年龄在植物年龄期间形成的根部的生长对于形成茶根系的形成具有重要意义。

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