甘蔗苗の発芽および初期生長に関する研究 : 第1報地上部の生長と冠根発生との関係について

概要

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Experiments were undertaken to clarify the relation between the development of above-ground parts and shoot roots of growing young cane. Five varieties of cane cuttings were planted under various conditions (soil,vermiculite, age of cuttings, date of planting and fertitiy of soil). After germination, the emergence of leaves and shoot roots were observed. The results obtained were summarized as follows: 1. The first shoot roots did not emerge until the 13th leaf (8 leaf scales plus 5 complete leaves) emerged, and the first shoot roots originated from the 6th basal node of young shoot. This relation was recognized at all the conditions examined. Basing on the above finding, the rooting of the shoot roots may be predicted by counting the leaves of above-ground parts. 2. The shoot roots of a given node emerged and elongated simultaneously with the leaf of a node which is higher than the former by seven. In other words, when a leaf was emerging, the 7th node counted downward from the one to which the leaf was attaching, posessd the ability of rooting, and this relation was maintained throughout the whole growing stages of cane. This fact may give a scientific foundation to the usual practices for preparing cuttings from a sugar cane shoot.
日本作物学会の論文
1971-12-28