Nitrogenase Activity in the Lichen Stereocaulon paschale: Recovery after Dry Storage |
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Authors: | KERSTIN HUSS-DANELL |
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Affiliation: | Department of Plant Physiology, University of Umeå, S-901 87 Umeå, Sweden |
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Abstract: | The effect of prolonged storage on nitrogenase activity in Stereocaulon paschale (L.) Fr. was studied. The thalli had a very low water content during the storage over silica gel at 4°C in the dark. For C2H2-reduction measurements the lichen samples were remoistened and held at 15°C in the light for 1–36 h before the addition of C2H2. With the longest pre-incubation time preceding the nitrogenase activity measurements there was no significant decrease in nitrogenase activity during 75 weeks of storage. The method of storage was simple and inexpensive and the nitrogenase activity characteristic of each lichen batch, due to seasonal variation, was well preserved during the storage. |
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