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Abstract: Comparative studies were made on the viability of basidiospores and tissue of Agaricus campestris stored at –4, –2, 0, 5, 15 and 25°C and at room temperature under vacuum- drying conditions. Spores stored at different temperatures, except those not placed in vacumm-drying tubes, all had retained germinability after one year's storage. A shorter storage period, however, was obtained with mushroom tissue. The tissue, when stored at –2 and –4°C, was still viable after one month, but lost its viability after one month at 0, 5, 15 and 25°C and at room temperature. Those tissues not stored in a vacuum-drying tube retained their viability only for less than one week.
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