球根茎類作物並びに種実に対する MH の生理機構に関する研究(第1報) : 馬鈴薯塊茎に対する生理機構,特にアスコルビン酸及び炭水化物の変動に対する MH の影響

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(1) The study was carried out to confirm the effect of malefic hydrazide on the inhibition of sprouting of the potato during the storage and also to investigate the physiological changes following the treatment. The spraying of 0. 1, 0. 2, 0.3 and 0.5 per cent solutions of MH was conducted on May 31 (3 weeks prior to the harvest) to the leaves of “Irish Cobbler” potatoes. (2) In potatoes, under normal cultivation, it was found that a gradual decrease of reducing sugar content and a gradual increase of starch were observed at the last stage of tuber development. This tendency was found more conspicuous in the potatoes when they were treated with MH. (3) It was also found that the ascorbic acid content in untreated leaves was rather rapidiy decreasing in aproaching to the harvest, but in the treated plot it was considerably higher during a certain period, then decreased more rapidly to reach to an extent of untreated leaves at the harvest time. The tubers from MH treated plot contained a little higher amount of the ascorbic acid than tubers of untreated plot. (4) In the tubers of untreated plot, the reducing sugar was observed to decrease after the tubers commenced sprouting, but, on the contrary, it was remarkably accumulated in the treated potatoes. The decrease of the starch and total carbohydrate contents in the tubers were lower in the treated potatoes throughout the storage period. (5) Although MH treatment destroys the apical dominance and inhibits the elongation of sprout, the period of dormancy was not prolonged in our experiment. Masses of stolon-like proliferations of buds were formed in such tubers, not producing normal sprouts.
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球根茎類作物並びに種実に対する MH の生理機構に関する研究(第1報) : 馬鈴薯塊茎に対する生理機構,特にアスコルビン酸及び炭水化物の変動に対する MH の影響

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