Water movement induced variations in growth regulation and metabolism of freshwater macrophyte Vallisneria spiralis L. in early growth stages

Ellawala, Champika; Asaeda, Takashi; Kawamura, Kiyoshi

doi:10.1007/s10750-013-1447-3

Cited by 12 publications

(18 citation statements)

References 40 publications

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“…That could be a possible explanation for the observed negative correlation for biomass ratio and turbulence. A similar trend was previously observed for Valisnaria spiralis after exposure to turbulence under laboratory conditions (Ellawala et al, 2013), whereas a similar field observation was also reported for some other aquatic plant species (Asaeda et al, 2010b;Bornette, Puijalon, 2011).…”

Section: Turbulence Biomass Ratiosupporting

confidence: 89%

Effects of water turbulence on plant, sediment and water quality in reed (Phragmites australis) community

Atapaththu

Asaeda

Yamamuro

et al. 2017

Ekológia (Bratislava)

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Atapaththu K.S.S., Asaeda T., Yamamuro M., Kamiya H.: Effects of water turbulence on plant, sediment and water quality in reed (Phragmites australis) community. Ekológia (Bratislava), Vol. 36, No. 1, p. 1-9, 2017. Even though the interaction between water movements and aquatic plant is crucial for the aquatic ecosystem management, the importance of water turbulence in this regard is not well documented. To add to our knowledge on the interaction between aquatic plant communities and water turbulence, this study examined turbulence, plant, sediment and water quality at the reed community (Phragmites australis) in the Lake Shinji, Japan. Observations were conducted along transects perpendicular to the shoreline. For each transect, reed communities were observed at land ward side, centre, water ward and the outside of the reed community. An elevated level of turbulence was observed outside compared to inside reed community, where the magnitude of turbulence decreased with distance into the community interior. A significant positive correlation was observed for turbulence and surface-dissolved oxygen where the latter was negatively correlated to reed density. Sediment composition was affected by water turbulence where the content of coarse particles positively correlated to turbulence. Accumulation of organic matter in anoxic sediments together with fine particles was observed under low turbulence. Our findings can offer insight into understanding the interactions between turbulence and aquatic plant communities.

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Section: Turbulence Biomass Ratiosupporting

confidence: 89%

Effects of water turbulence on plant, sediment and water quality in reed (Phragmites australis) community

Atapaththu

Asaeda

Yamamuro

et al. 2017

Ekológia (Bratislava)

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“…; Ellawala et al . , ). The complete plasmolysis that was observed in leaves after exposure to high turbulence (Figs and ) might be responsible for the impaired growth in the turbulence‐stressed plants because the total chlorophyll content of E. nuttallii was reduced by approximately 40% with exposure to the mechanical stress of turbulence (Atapaththu & Asaeda ).…”

Section: Discussionmentioning

confidence: 99%

“…; Ellawala et al . ). Each microcosm consisted of a layer of commercial sand (thickness of substrate: ~4 cm) and 5% Hoagland's nutrient solution as culture medium (Atapaththu & Asaeda ), and the water level was maintained at 17 cm above the substrate.…”

Section: Methodsmentioning

confidence: 97%

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Effects of water turbulence on variations in cell ultrastructure and metabolism of amino acids in the submersed macrophyte, Elodea nuttallii (Planch.) H. St. John

et al. 2015

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The interactions between macrophytes and water movement are not yet fully understood, and the causes responsible for the metabolic and ultrastructural variations in plant cells as a consequence of turbulence are largely unknown. In the present study, growth, metabolism and ultrastructural changes were evaluated in the aquatic macrophyte Elodea nuttallii, after exposure to turbulence for 30 days. The turbulence was generated with a vertically oscillating horizontal grid. The turbulence reduced plant growth, plasmolysed leaf cells and strengthened cell walls, and plants exposed to turbulence accumulated starch granules in stem chloroplasts. The size of the starch granules increased with the magnitude of the turbulence. Using capillary electrophoresis-mass spectrometry (CE-MS), analysis of the metabolome found metabolite accumulation in response to the turbulence. Asparagine was the dominant amino acid that was concentrated in stressed plants, and organic acids such as citrate, ascorbate, oxalate and γ-amino butyric acid (GABA) also accumulated in response to turbulence. These results indicate that turbulence caused severe stress that affected plant growth, cell ultrastructure and some metabolic functions of E. nuttallii. Our findings offer insights to explain the effects of water movement on the functions of aquatic plants.

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“…Previous studies have indicated that the high acclimation capacity of plant species, such as V. spiralis, to environmental stresses and organic-rich sediments might involve the modulation of pore water chemistry (Soana 2014), the inhibition of growth in lakes under eutrophication (Chen et al 2015), and the modification of root morphology to allow the adaptation and survival of some wetland plant species under anaerobic conditions at different water depths (Rosolem et al 1999;Bai et al 2014). Water movement impacts the growth of macrophytes through the drag, lift, and displacement of these plants and a reduction in the survival of developing winter buds or seedlings markedly affects the colonization of this species (Doyle 2001;Madsen et al 2001;Ellawala et al 2013). However, there are few systematic studies on the plasticity and morphology of submersed plants in response to water depth and light reduction.…”

Section: Introductionmentioning

confidence: 99%

Effects of water depth on the seedling morphology and chlorophyll fluorescence ofVallisneria natans

Cao

Wang

Zhang

et al. 2016

Journal of Freshwater Ecology

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The responses of Vallisneria natans to different water depths were analyzed in potted plants cultivated in a pond. The aim of the present study was to outline the effects of turbid water (i.e. low light) on the morphological parameters and photosynthetic efficiency of V. natans. After 60 days, V. natans plants of morphological characteristics (blade length, width, area, and growth rate) at a depth of 140À170 cm showed a significant decrease with increasing water depth and each parameter was negatively correlated with water depth (p < 0.01); the growth rate was remarkably inhibited with increasing water depth. The portion of light energy absorbed for electron transfer through the antenna pigments gradually decreased at a water depth of 120À170 cm and the concentration of electrons involved in CO 2 fixation and qP decreased. However, qN exhibited an opposite trend in the leaves (p < 0.01). The utilized light intensity decreased with the increasing depth. Thus, both the morphology and physiology of V. natans are significantly affected by water depth. Moreover, the development of PS II and growth characteristics provided a basis for theoretical comparative analysis of light-dependent fluorescence signals observed in different samples under various conditions.

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Water movement induced variations in growth regulation and metabolism of freshwater macrophyte Vallisneria spiralis L. in early growth stages

Cited by 12 publications

References 40 publications

Effects of water turbulence on plant, sediment and water quality in reed (Phragmites australis) community

Effects of water turbulence on plant, sediment and water quality in reed (Phragmites australis) community

Effects of water turbulence on variations in cell ultrastructure and metabolism of amino acids in the submersed macrophyte, Elodea nuttallii (Planch.) H. St. John

Effects of water depth on the seedling morphology and chlorophyll fluorescence ofVallisneria natans

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