Vegetative survival, akinete formation and germination in three blue-green algae and one green alga in relation to light intensity, temperature, heat shock and UV exposure
Vegetative survival, akinete formation and germination in three blue-green algae and one green alga in relation to light intensity, temperature, heat shock and UV exposure
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DOI：
10.1007/bf02817618
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发表时间：
2000-01-01
影响因子：
2.6
通讯作者：
Singh, V
中科院分区：
文献类型：
--
作者：
Agrawal, SC;Singh, V
蓝绿藻Anaboena iyengarii、Westiellopsis prolifica、Nostochopsis lobatus和绿藻Pithophora oedogonia仅靠营养存活是不够的，需要适宜的生长条件才能形成肌酸体。在所有藻类中，在黑暗中既不能形成也不能发芽，3001x的昏暗光照足以使大多数动胞萌发并维持营养存活，但不足以形成最佳的动胞体。在35℃的温度下，虽然所有藻类的动子都能萌发，但在这个温度下，营养存活和动子的形成都明显受到抑制。在任何测试的藻类中，无论是无效的还是影响植物存活的，任何水平的热量或紫外线震动都不会促进肌菌的形成或发芽。所研究的所有藻类的动子都具有较强的耐热性，对紫外线也有一定的耐受性。所有藻类的湿态和干态动蛋白都具有相同的抗紫外线能力。在所有藻类中，随贮藏时间的延长，干、湿动菌活力的下降幅度大致相同，但随着贮藏温度从20℃逐渐降低到0℃，下降幅度更大。因此，胞杆菌可以忍受干燥，但不能忍受霜冻。
The mere vegetative survival was not sufficient but suitable growth conditions were required for akinete formation to occur in the blue-green algae Anaboena iyengarii, Westiellopsis prolifica, Nostochopsis lobatus and in the green alga Pithophora oedogonia. In all algae, akinetes were neither formed nor germinated in darkness, and while dim light of 300 1x was sufficient for most of akinetes to germinate and also to maintain vegetative survival, it was not adequate for optimum akinete formation. Although akinetes of all algae could germinate at 35 degreesC, both the vegetative survival and akinete formation were markedly suppressed at this temperature. Heat or UV shook of any level, whether ineffective or effecting vegetative survival, did not promote akinete formation or germination in any alga tested. Akinetes of all algae under study were relatively tolerant to heat and also to some extent to UV. Both wet and dried akinetes of all algae were equally UV tolerant. In all algae, the viability of both wet and dried akinetes decreased more or less equally with storage time, but the decrease was more drastic when storage temperature was progressively lowered from 20 to 0 degreesC. Hence the akinetes can tolerate dryness but not frost.