Comparison of the morphological traits of the submerged macrophyte Potamogeton malaianus from turbid and clear waters in Lake Taihu
Comparison of the morphological traits of the submerged macrophyte Potamogeton malaianus from turbid and clear waters in Lake Taihu
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DOI：
10.1007/s10750-018-3509-z
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发表时间：
2018-01
期刊：
影响因子：
2.6
通讯作者：
B. Guan;Xu Wang;Chunyu Yin;Zhengwen Liu;Zhaoxia Wang;Yiming Gao
中科院分区：
文献类型：
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作者：
B. Guan;Xu Wang;Chunyu Yin;Zhengwen Liu;Zhaoxia Wang;Yiming Gao
生长在清澈和浑浊的水中的沉水植物可能会发展出不同的形态，以适应不同的光照水平。经过世代和长时间改变的植物形态被认为是生态型，即使植物返回到它们的原始环境，这种变化也被认为是持久的。对采自太湖清水和浑浊水域的马来眼子菜标本进行了原生环境和移栽到相似和不同环境中的比较。结果表明，浑浊的水形成了OFP。Maraianus的枝条明显较大，叶片更多、更长，生物量更多地集中在水面附近。移栽到清水中后，来自清水和浑水植物的子梢与母枝没有显著差异，但表现出显著的差异。来自浑水植物的母子枝移栽到浑水中后，形态相似，但与清水植物有显著差异。从清水中移植的植物在浑浊的水中无法存活。我们的结果表明，P。马来物种在浑浊的水中形成特殊的生态型，这可能有助于植物最大限度地利用阳光，从而可能有助于观察到该物种向富营养化湖泊混浊水域的扩张。
Submerged macrophytes growing in clear- and turbid water may develop morphological differences as adaptations to difference light levels. Plant forms altered over generations and longtime are regarded as ecotypes and the changes are assumed to be persistent, even if the plants are returned to their ancestral environment. Specimens ofPotamogeton malaianusfrom clear and turbid water zones of Lake Taihu were compared in their native settings and after transplanting to similar and different environments. Results showed that turbid water forms ofP. malaianushad significantly larger shoots with more and longer leaves and more biomass concentrated near the water surface. After transplanting into clear water, the daughter shoots arising from clear or turbid water plants showed no significant differences from their mother shoots, but showed significant differences from each other. After transplanting into turbid water, mother and daughter shoots originating from turbid water plants had similar morphologies, but were significantly different from clear water plants. Plants transplanted from clear water did not survive in turbid water. Our results suggest thatP. malaianusforms special ecotype in turbid water, which may help plants maximize their sunlight-harvesting potential and thus might contribute to an observed expansion of the species into turbid water areas of eutrophic lakes.