Importance of coalescent development of Gracilaria sp tetraspores
Importance of coalescent development of Gracilaria sp tetraspores
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龙须菜四孢子合并发育的重要性
DOI：
10.1111/pre.12131
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发表时间：
2016
影响因子：
1.5
通讯作者：
Lin Cunguo
中科院分区：
文献类型：
--
作者：
Yu Ruixue;Lin Apeng;Xie Xiujun;Wang Hui;Zhang Fu;Liu Guangzhou;Wang Guangce;Lin Cunguo
龙须菜属是主要的大型藻类栖息在潮间带，并暴露于不断的波浪作用和电流。在野生龙须菜种群中，叶状体往往成群出现，在海岸上彼此靠近。很少发现菌体单独生长，但这种集群发展的原因尚不清楚。本研究对龙须菜属鱼类四孢子的早期发育进行了追踪。并检查盘的粘附强度。我们记录了两种不同的四孢子衍生的圆盘发育模式：在第一种模式中，单个四孢子发育成圆盘;而在第二种模式中，多个相互靠近的四孢子在早期发育过程中合并形成单个复合圆盘。我们发现，更多的直立生长从合并的光盘和合并的光盘的附着面积较大相比，那些单独的光盘。分析了聚结盘和单个盘的粘附强度。快速水流处理后，合并圆盘的保留百分比高于单个圆盘的保留百分比，这表明与单孢子圆盘相比，合并圆盘能够更好地承受波浪流。在此基础上，提出了江蓠属鱼类的聚类分析。在潮间带内的站点的植物是一种机制，使这种大型藻类生存的波浪作用和电流发生在这一地区，并在这些地区的植物补充加强了凝聚力盘在早期发展。
Gracilariaspp. are dominant macroalgae inhabiting the intertidal zone and are exposed to constant wave action and currents. In wildGracilariapopulations, fronds tend to occur in clusters, being grouped close to one another on the shore. It is rare to find thalli growing individually, but the reason for such a clustering development is unknown. In this study we traced the early development of tetraspores ofGracilariasp. and examined the adhesion strength of discs. We recorded two different tetraspore‐derived disc developmental patterns: in the first pattern, individual tetraspores developed into discs; whereas in the second pattern, multiple tetraspores that had attached in proximity to each other, coalesced to form a single composite disc during early development. We found that more uprights grew from coalesced discs and that the attachment areas of coalesced discs were larger compared with those of individual discs. The adhesion strengths of coalesced discs and individual discs were analyzed. The retention percentage of coalesced discs after treatment with rapid water flow was higher than that of individual discs, suggesting that coalesced discs are better able to withstand wave flow when compared with single‐spore discs. Based on these results, we propose that the clustering ofGracilariasp. plants at sites within the intertidal zone is a mechanism that enables this macroalgae to survive the wave action and currents that occur in this zone, and that plant recruitment in these areas is enhanced by the coalescence of holdfast discs during early development.