水生植物

Submerged aquatic plant with ribbonlike leaves; Old World and Australia.

一种沉水的水生植物，叶长似带；生长在旧大陆和澳大利亚。

WHY flow is the most important enironmental factor controlling the ecology of rier plants.

为什么说水流动对水生植物生态是最重要的环境因素？？最重要？不是吧？

Usually includes water depth 200 meter below the complete waters, is all year long dark, the sunlight cannot infiltrate completely, the salinity is high, the pressure high, the water temperature is low and is constant, the aquatic plant cannot grow, the animal type and quantity are deficient, and mostly is the detritus animal, only then the few sarcophagy animal, and along with the sea water depth increases, but reduces unceasingly.

通常包括水深200米以下的全部水域，终年黑暗，阳光完全不能透入，盐度高，压力大，水温低而恒定，水生植物不能生长，动物种类和数量非常贫乏，且大多属碎屑性动物，只有少量肉食性动物，并随海水深度增加而不断减少。

To understand the toxicity mechanisms of mixed heavy metals on aquatic plant,indicators of algea growth rate,content of reduced glutathione,activities of glutathione S-transferase and glutathione peroxidase of green algae, Scenedesmus quadricauda were measured to analyze the individual and joint toxic effects of lead and mercury.

为进一步了解重金属复合污染对水生植物产生毒害作用的机制，以单细胞藻类生长及细胞内还原型谷胱甘肽含量、谷胱甘肽-S-转移酶和谷胱甘肽过氧化物酶活性为指标，对铅和汞单一及联合胁迫对四尾栅藻的毒性作用进行了研究。

The results show that treatment with aquatic plants gives better water quality than in areas without aquatic plants with Scirpus yagara ohw giving the best results.

为了解美人蕉、香根草和荆三棱3种水生植物带改善河水水质的作用，在中试规模上研究了它们处理受污染河水的效果。

Simple nearly stemless freshwater aquatic plants; widely distributed .

简单几近无茎淡水水生植物；广泛分布。

It was observed that two macrophytes showed obvious cumulative effects to lower concentrations of Cd exposure. PCs were significantly induced in P. stratiotes L.

结果显示，2种水生植物对外界Cd胁迫表现出明显的吸收和积累效应，水浮莲体内PCs的响应明显强于伊乐藻。

Regressive analysis showed that there were linearly positive relationships between PC contents and Cd toxicity in E. nuttallii and P. stratiotes L.. It was indicated that PCs could be a promising biomarker for estimating Cd toxicity.

回归分析显示，2种水生植物体内PCs的合成水平与Cd的生物毒性呈现一定的线性关系，表明PCs可作为重金属Cd胁迫的生物标记物指示水体中重金属的毒害程度。

The Hainan population occurs in a clean, sluggish coastal stream with abundant hydrophytes, and is sympatric with 20 fish species.

发现海南唐鱼的地点是一条低地小河，水质清澈，水流缓慢，水生植物茂盛，与广东省报道的唐鱼生境类似。

The physiological response and nitrogen absorption process of macrophytes Vallisneria natans under copper stress for 11 d were studied by indoor simulation method.

采用室内模拟方法，研究大型水生植物苦草在铜胁迫下11 d内的生理响应及氮素吸收过程。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。