| 摘要: |
| 于1992年9月-1994年8月，在模拟潮间带生态条件的培养装置中，对龙须菜生长和发育的过程进行长期的连续性观察研究。研究中发现，以往被称为“固着器”的藻体匍匐组织具有特殊生理特性：它是抱子萌发后前先形成的部分，是直立藻体产生的基础；当夏末和深冬季节到来时，直立藻体通常成熟，放散泡子后逐渐衰退，这种趋势从藻体尖端开始逐渐向基部发展，最终保留匍匐组织度过逆境。待温度适宜时又从匍匐组织上萌生新的直立技。这一结果说明，龙须菜匍匐组织具有较强的抗逆性能和再生能力；在自然条件下，除孢子传代外，还存在利用匍匐组织进行繁衍的另一条途径。对直立藻体和匍匐组织的细胞结构及活体吸收光谱进行比较，表明，二者间均有所差异。 |
| 关键词: 须菜 固着器 体细胞繁殖 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院“八五”重点科研项目 |
附件 |
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| SYUDY ON CHARACTERISTICS OF CREEPING TISSUE OF GRACILARIA LEMANEIFORMIS |
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LI Ren-zhi
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Institute of Oceanology,the Chinese Academy of Sciences,Qingdao,266071
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| Abstract: |
| A device of simulating ecological environment located over the region of intertidal zone was set-up, through which the growth and development of Gracilaria lemaneiformis were observed and studied from Sept. 1992 to Aug. 1994 and subsequently the creeping tissues of thalli, known as “holdfast” were found with important physiological features. It was the first formed after spores germinated, then to be the base branches grown up, and later passing through the seasons of summer and winter branches matured and spores discharged, decaying from apical port to base. In the duration, it is the portion of creeping tissue, keeping itself to go against adversity and regenerating when temperature once suitable. The whole process undergone indicates that the creeping tissues of G. lemaneiformis possess the capability of anti-adversity and reproductivity and therefore under natural condition to take the advantage of regeneration capability of creeping tissue is an another effective way for reproduction, apart from spore propagation. Besides, the contrast between creeping tissue and erect thallus with spectrophotometric absorption was also recorded. |
| Key words: Gracilaria lemaneiformis, Holdfast, Somatic propagation |
