The response of epiphytic microbes to habitat and growth status of <i>Potamogeton malaianus</i> Miq. in Lake Taihu

Cai, Xiao-Qiu; Gao, Guang; Tang, Xiangming; Dong, Bi‐Cheng; Dai, Jiangyu; Chen, Dan; Song, Yuzhi

doi:10.1002/jobm.201200220

Cited by 29 publications

(18 citation statements)

References 44 publications

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“…Total nitrogen (TN) and total phosphorus (TP) are control factors of bloom formation and different ratios of TN and TP have different promotion effects 23 24 25 . Those aimed at microbial community were mainly based on coarse-resolution technique like PCR-DGGE 26 27 28 29 30 31 32 33 , T-RFLP 34 35 36 . Dominating bacteria in both sediment and water are Alpha-, Beta-, Gamma- and Deltaproteobacteria, Actinobacteria and Bacteriodetes .…”

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confidence: 99%

Annual periodicity in planktonic bacterial and archaeal community composition of eutrophic Lake Taihu

Zhang

Liu

et al. 2015

Sci Rep

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Bacterioplankton plays a key role in nutrient cycling and is closely related to water eutrophication and algal bloom. We used high-throughput 16S rRNA gene sequencing to profile archaeal and bacterial community compositions in the surface water of Lake Taihu. It is one of the largest lakes in China and has suffered from recurring cyanobacterial bloom. A total of 81 water samples were collected from 9 different sites in 9 different months of 2012. We found that temporal variation of the microbial community was significantly greater than spatial variation (adonis, n = 9999, P < 1e−4). The composition of bacterial community in December was similar to that in January, and so was the archaeal community, suggesting potential annual periodicity. Unsupervised K-means clustering was used to identify the synchrony of abundance variations between different taxa. We found that the cluster consisting mostly of ACK-M1, C111 (members of acIV), Pelagibacteraceae (alfV-A) and Synechococcaceae showed relatively higher abundance in autumn. On the contrary, the cluster of Comamonadaceae and Methylophilaceae (members of lineage betI and betIV) had higher abundance in spring. The co-occurrence relationships between taxa were greatly altered during the cyanobacterial bloom according to our further network module analysis.

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confidence: 99%

Annual periodicity in planktonic bacterial and archaeal community composition of eutrophic Lake Taihu

Zhang

Liu

et al. 2015

Sci Rep

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“…Potamogeton malaianus , a perennial submerged macrophyte, is the dominant species extensively distributed in the eutrophic Taihu Lake China [32]. According to our field observation, a plenty of periphyton attached on the surfaces of leaves and stems of P. malaianus , and there existed variations in the density of periphyton between apical leaves, middle leaves, basal leaves, and stems on the same macrophyte.…”

Section: Introductionmentioning

confidence: 79%

“…P. malaianus is the dominant species with extensive distribution in Gonghu Bay and West Taihu Lake [36], [37]. There is abundant macrophyte cover (30%) in Gonghu Bay with relatively good water quality (TN, 1.185±0.015 mg·L –1 ; TP, 0.237±0.010 mg·L –1 ; NH 4 + -N, 0.08±0.002 mg·L –1 ).…”

Section: Methodsmentioning

confidence: 99%

O2, pH, and Redox Potential Microprofiles around Potamogeton malaianus Measured Using Microsensors

et al. 2014

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This study aimed to elucidate the effects of periphyton on the microprofiles of oxygen (O2), pH, and oxidation-reduction potential around the stems and leaves of a submerged macrophyte Potamogeton malaianus and on the plant growth in the eutrophic shallow Taihu Lake, China. The microprofiles were measured using a motorized microprofiling system equipped with microsensors. The leaf age of the macrophyte and periphyton exerted significant effects on the microprofiles of O2, pH, and oxidation-reduction potential. O2 concentration and pH increased whereas the oxidation-reduction potential decreased with decreasing distance to the stem/leaf surface. The fluctuation amplitudes of O2, pH, and oxidation-reduction potential were the largest in the microprofiles of mature leaves and the lowest in senescent leaves. The periphyton increased the thickness of the broad diffusive boundary layer and fluctuation amplitudes of O2, pH, and oxidation-reduction potential. When the periphyton was removed, the thickness of the broad diffusive boundary layer in the microprofiles of stems, senescent leaves, and mature leaves reduced by 29.0%, 49.72%, and 70.34%, and the O2, pH, and oxidation-reduction potential fluctuation amplitudes also declined accordingly. Our results suggest that a thick periphyton exerted negative effects on the growth of macrophytes by providing extensive shading and creating a barrier that hindered the transport of dissolved substances such as O2, and led to premature decline in macrophytes in the eutrophic Taihu Lake. The consequent implications can help to elucidate the control mechanism of the broad diffusive boundary layer around macrophytes on nutrient cycling in eutrophic waters and to better understand the role of this layer in the Taihu Lake and other similar eutrophic waters.

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“…In addition, the allelopathy may occur through host macrophytes affecting epiphytic microorganisms [28]. Our previous investigations from field observations showed that the effect of water nutrient availability on epiphytic microorganisms might be reduced by host macrophytes, resulting in no significant differences in epiphytic microorganisms from the same plant species between two sites with different nutrient conditions in Lake Taihu [10]. Moreover, some researchers suggest that epiphytic microorganisms do not easily colonize and proliferate on healthy part of macrophytes [29,30].…”

Section: Discussionmentioning

confidence: 99%

The response of epiphytic bacteria on Vallisneria natans (Lour.) Hara (Hydrocharitaceae) to increasing nutrient loadings

Cai

Yao

Gao

et al. 2016

J. Basic Microbiol.

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To investigate the effects of water column nutrient loading on epiphytic bacteria, we determined the abundance and community composition of epiphytic bacteria on the submerged macrophyte Vallisneria natans (Lour.) Hara during the growth season (June-October) under four different nutrient concentrations (nitrogen (N)-phosphorus (P) in mg L(-1) : 0.5-0.05, 1.0-0.1, 5.0-0.5, 10.0-1.0; hereafter NP-1, NP-2, NP-3, NP-4, respectively), using epifluorescence microscopy method and terminal restriction fragment length polymorphism (T-RFLP) analysis, respectively. Relative to low nutrient conditions (NP-1), there was no significant effect on the epiphytic bacterial community, and even a decrease in the number of epiphytic bacteria, which linked to the well growth status of host macrophytes at moderate nutrient conditions (NP-2). However, further nutrient enrichment induced significant increase in the abundance of epiphytic bacteria, and marked changes in the community structures of epiphytic bacteria. Furthermore, at high nutrient conditions, epiphytic bacterial communities varied widely temporally, and were not stable compared with those at the lower nutrient conditions. These results indicated that the effects of nutrient enrichment on epiphytic bacteria were nonlinear and dependent on the nutrient concentrations in the water.

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The response of epiphytic microbes to habitat and growth status of Potamogeton malaianus Miq. in Lake Taihu

Cited by 29 publications

References 44 publications

Annual periodicity in planktonic bacterial and archaeal community composition of eutrophic Lake Taihu

Annual periodicity in planktonic bacterial and archaeal community composition of eutrophic Lake Taihu

O2, pH, and Redox Potential Microprofiles around Potamogeton malaianus Measured Using Microsensors

The response of epiphytic bacteria on Vallisneria natans (Lour.) Hara (Hydrocharitaceae) to increasing nutrient loadings

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