日長処理の差異がオモダカ(Sagittaria trifolia)の生育および繁殖体の生産に及ぼす影響

概要

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The purpose of this experiment was to determine the effects of photoperiodic treatment on the growth and production of propagules of Sagittaria trifolia L., being treated with long (16hr), short (8hr) and natural day length. The growth in plant height, the number of arrow-shaped leaves and total dry matter increased at long days, while conversely decreased markedly at short days. There were little differences in the date of appearance of inflorescence and flowering time among 3 photoperiodic conditions. The number of fruits per plant increased with increase of day length, whereas, 100 kernel weight showed minimum value at natural day length. The date of tuber initiation was not affected by photoperiodic treatment. The effect of the treatment on tuber production was evident in the marked increase of crude reproductive efficiency to tuber (dry weight of tubers / total dry weight of plant) at short days, but decreased at long days. Total dry weight of tubers per plant decreased in the order of natural, short and long day length, but those differences were trifling. The number of tubers per plant decreased conspicuously at long days. The average dry weight of a tuber increased at long days, but decreased at short days.
日本雑草学会の論文
1981-09-10