シロザ種子の休眠覚醒に及ぼす温度および光の影響

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In order to analyze the factors controlling the breaking of seed dormancy and germination of C . album L.,several experiments were carried out. The results are as follows ; Effect of stratification at 5℃ for breaking seed dormancy was observed in typical annual weed species such as, Polygonum lapathlfolium L. subsp. nodosum (PERS.) KITAM., Echinochloa crus-galli (L.) BEAUV. var. praticola OHWI, Digitaria ciliaris (RETZ.) KOELER except C. album L.. Stratification at higher temperatures was more effective in the breaking of seed dormancy than at 5℃ , and the effect became more significant with the increase of the temperature from 10℃ to 35℃ and with the prolongation of the treatment period. These effects were apparent only when the seeds were stratified under dark conditions without any light irradiation. Spectra of monochromatic lights used for irradiation during the stratification process influenced the germination in a specific way. While lights with a peak wavelength at 630 or 660 nm were found to induce sprouting during the treatment, subsequent germination test showed higher rates for the treatment with light at other wavelengths, i.e., those shorter than 600 nm or longer than 690 nm. The seed germination percentages under different temperature conditions were affected by the temperature to which the seeds had been exposed during stratification. When the seeds had been stratified at low temperatures, the germination was more active under lower and fluctuating temperature conditions. On the contrary, seeds subjected to higher temperatures germinated actively under higher temperature conditions.
日本雑草学会の論文
1988-12-26

シロザ種子の休眠覚醒に及ぼす温度および光の影響

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