| 摘要: |
| 作者研究了（NH4）2SO4的浓度对条斑紫菜生长和单孢子形成、放散与附着的影响。在室内培养条件下,条斑紫菜的生长和单孢子形成、放散、附着要求的营养条件不完全一致。当硫酸铵的浓度增加到一定量时紫菜的生长受到抑制;低浓度时,单孢子的放散、附着少;高浓度时,单孢子放散、附着的多。 |
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| THE INFLUENCE OF THE VARIOUS CONCENTRATIONS OF （NH4）2SO4 ON THE GROWTH OF THALLI OF PORPHYRA YEZOENSIS AND THE FORMATION, DISCHARGE AND ADHERENCE OF MONOSPORES |
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| Abstract: |
| Growth and development of thalli of P. yezocnsis are influenced by various environmental conditions. Apart from the temperature and light the nutrient is also a very important factor. The present paper deals with the relationship between the growth and the formation, discharge and adherence of monospores of thalli and nitrogenous fertilizer. The results of the experiment are summarized as follows: 1. Thalli of porphyra growing in different marine environments require different (NH4)2SO4 contents. The consen-tration of (NH4)2SO4 demanded by thalli of porphyra is lower in the poor region than in the fertile region. 2. The nutrition condition for forming monospores of porpnyra thalli collected from both poor and fertile region are usually similar. More monospores are formed by thalli above the (NH4)2SO4 concentration of 10 mg/l, but few or none are formed below 1 mg/l. Therefore related to the concentration of (NH4)2SO4. The formation of monospores are clo-sely. In order to get more monospores, it would be necessary to keep a certain concentration of (NH4)2SO4 in the medium. 3. The quantity of the discharge and adherence varies with the number of monospores formed. The effect of the nutrient concentration on the discharge and adherence of monospores is not evident. 4. The color of both the control and the 1 mg/l thalli will turn from purplish red to light green or candle yellow, but in 10-100 mg/l medium they remain purplish red. 5. The vacuoles in vegetative cells are larger and more in number in both the control and the one in 1 mg/l medium. The vacuoles of the vegetative cells in 10-100 mg/l medium can hardly be seen. These phenomena agree with those in nature. |
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