Effect of clonal fragmentation on the growth of Vallisneria natans (Lour.) Hara at contrasting nutrient and light conditions

Effect of clonal fragmentation on the growth of Vallisneria natans (Lour.) Hara at contrasting nutrient and light conditions
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对比营养和光照条件下克隆断裂对苦草生长的影响

DOI:
10.1007/s10750-020-04499-1
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发表时间:
2021-01
期刊:
影响因子:
2.6
通讯作者:
Jeppesen Erik
Jeppesen Erik
中科院分区:
生物学3区
文献类型:
--
作者:
Peng Hui;Ge Dabing;Yuan Guixiang;Zou Dongsheng;Fu Hui;Jeppesen Erik

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由各种干扰引起的克隆断裂(CF)显着影响植物的生长性能。然而,人们对CF如何影响面临光限制和养分富集的沉水植物的生长知之甚少,这是富营养化湖泊中常见的情况。为了研究CF对苦草(Lour.)Hara(温暖湖泊中常见的沉水植物物种)的影响,我们将三种不同的光强度(4%、15%和30%自然光)与水中三种不同的营养水平结合起来,并保持匍匐茎被切断或完整。我们发现 CF 对 V. natans 的生长产生负面影响,并且这种影响很大程度上取决于光照和营养水平。我们对切断的植物和完整的植物进行比较表明,CF 在中等光照条件下降低了生物量积累,而在低光和高光水平下没有出现显着差异。 CF 对植物生物量的负面影响在中等和高营养水平下往往更为显着。当光利用率较高时,在中等和高营养水平下,总叶绿素含量随着 CF 的增加而降低。我们的研究增加了关于 CF 对富营养化湖泊中沉水植物生存和生长的作用的新信息。
Clonal fragmentation (CF), caused by various disturbances, significantly affects the growth performance of plants. However, little is known about how CF affects the growth of submersed macrophytes facing light limitation and nutrient enrichment, a typically situation found in eutrophic lakes. To examine the effects of CF on Vallisneria natans (Lour.) Hara, a common submersed macrophyte species in warm lakes, we combined three different light intensities (4%, 15%, and 30% natural light) with three different nutrient levels in the water and kept the stolons severed or intact. We found that CF negatively affected the growth of V. natans and that the effect strongly depended on light and nutrient levels. Our comparison between severed and intact plants showed that CF decreased the biomass accumulation under moderate-light conditions, whereas no significant difference appeared at low and high light levels. The negative effect of CF on plant biomass tended to be more significant at moderate and high nutrient levels. The total chlorophyll content decreased with CF at moderate and high nutrient levels when light availability was high. Our study adds new information about the role of CF on the survival and growth of submersed macrophytes in eutrophic lakes.
DOI: 10.3389/fpls.2019.00485
发表时间: 2019-04
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发表时间: 2019-07
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发表时间: 2008
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发表时间: 2003-09
影响因子: 1.6
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