Effect of silicon in Pyropia yezoensis under temperature and irradiance stresses through antioxidant gene expression

Le, Bao; Nadeem, Mawra; Shin, Jong-Am; Kang, Man-Gu; Chung, Gyuhwa; Sun, Sangmi

doi:10.1007/s10811-018-1605-0

Cited by 13 publications

(7 citation statements)

References 28 publications

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“…Silicon (Si) is a beneficial element that helps plants overcome temperature stresses. The mechanisms involved include stimulation of antioxidant systems [1,2], maintenance of photosynthetic proteins [3], retention of water content [4], fortification of cell wall [4], restoration of hormonal balances [5], and regulation of stress-related genes [6,7]. Although Si is largely present in soil, the plant-available form (monosilicic acid) is relatively limited, especially in Korea which has low available Si in soil (averaged 72 mg•kg −1 ) [8,9].…”

Section: Introductionmentioning

confidence: 99%

Silicon Alleviates Temperature Stresses in Poinsettia by Regulating Stomata, Photosynthesis, and Oxidative Damages

Jeong

2020

Agronomy

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The effects of silicon (Si) on temperature stresses were investigated in poinsettia. Well-rooted cuttings supplemented with and without Si were exposed to 40 °C, and plants treated with or without Si during cutting propagation and cultivation were subjected to 4 °C. The results showed that almost all the stomata of cuttings without Si supplementation were closed, while some of them were still open in cuttings supplemented with Si under a high temperature stress. However, Si was not able to alleviate stomatal closure of poinsettia under low temperature stress. The increased epicuticular wax might contribute to enhanced resistance of poinsettia to low temperature stresses. In addition, poinsettia maintained a higher photosynthetic rate and lower malonaldehyde and hydrogen sulfide concentrations when supplemented with Si under high and low temperature stresses, which might contribute to lower APX activities. Overall, temperature stresses had negative impacts on the physiological characteristics of poinsettia, while Si could alleviate some effects of temperature stresses.

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Section: Introductionmentioning

confidence: 99%

Silicon Alleviates Temperature Stresses in Poinsettia by Regulating Stomata, Photosynthesis, and Oxidative Damages

Jeong

2020

Agronomy

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“…Potential Si pools in freshwater cyanobacteria, which are increasing in abundance in the Great Lakes [ 11 ], is unknown. In marine macroalgae, Markham and Hagmeier [ 46 ] showed negative growth effects of GeO 2 in several species, suggesting requirements for Si uptake, bSi deposition has been associated with wound healing in Saccharina japonica kelp sporophytes [ 47 ], and a red seaweed showed evidence of increased temperature and irradiance stress when Si was less that 50 μM [ 48 ]. There is clearly a need to re-evaluate the pools and role of silica in broader taxonomic groups within aquatic ecosystems.…”

Section: Resultsmentioning

confidence: 99%

Role of nearshore benthic algae in the Lake Michigan silica cycle

et al. 2021

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Si cycling is linked with processes from global carbon sequestration to community composition and is especially important in aquatic ecosystems. Lake Michigan has seen dramatic fluctuations in dissolved silica (dSi) over several decades, which have been examined in the context of planktonic processes (diatom blooms), but the role of benthic organisms (macroalgae and their epiphytes) in Si cycling have not been explored. To assess significance of nearshore benthic algae in Si dynamics, we assembled dSi data from an offshore site sampled since the late 1980’s, and sampled off three Milwaukee beaches during 2005–19. Using colorimetric assays and alkaline digestion, we measured dSi, biogenic silica in particulate suspended material (pSi) and biogenic silica in benthic macroalgae (Cladophora) and epiphytic diatoms (bSi). Offshore, dSi increased about 1 μM per year from 25 μM in the late 1980’s to nearly 40 μM in 2019. Nearshore dSi fluctuated dramatically annually, from near zero to concentrations similar to offshore. Both Cladophora and its epiphytes contained significant bSi, reaching up to 30% of dry mass (300 mg Si g dry mass-1) of the assemblage in summer. Microscopic analyses including localization with a Si-specific-stain and X-ray microanalysis showed bSi in epiphytic diatom cells walls, but the nature and localization of Si in macroalgae remained unclear. A simple model was developed estimating Si demand of algae using the areal macroalgal biomass, growth rates inferred from P-content, and bSi content, and comparing Si demand with dSi available in the water column. This indicated that 7–70% of the dSi in water overlying nearshore benthic algal beds could be removed per day. Key elements of the Si cycle, including which organisms sequester bSi and how rapidly Si is recycled, remain unclear. This work has implications for coastal marine waters where large macroalgal biomass accumulates but bSi content is virtually unknown.

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“…The Neopyropia yezoensis strain (NY-HN-ST1) was originally collected from a commercial farm at Haenam, Korea (34° 57′N, 126° 60′E) in December 2020. This strain was vegetatively propagated at the Marine Ecology and Green Aquaculture Laboratory, Incheon National University using a BF-400PGC plant growth chamber (Biofree, Bucheon, Korea) at optimal growth conditions before used 28 , 29 . Growing conditions included von Stosch enriched medium (VSE), 10 °C, 90 ± 10 μmol m −2 s −1 photosynthetically active radiation (PAR) provided by cool white, fluorescent bulbs, 12:12 L:D, and 30 psu of salinity.…”

Section: Methodsmentioning

confidence: 99%

Effects of extraction methods for a new source of biostimulant from Sargassum horneri on the growth of economically important red algae, Neopyropia yezoensis

Han

Park

Umanzor

et al. 2022

Sci Rep

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Sargassum horneri is a major bloom forming species in Korea and China. It is important to find a way to utilize the huge biomass of Sargassum horneri in the region. Seaweed-derived biostimulants are primarily derived from brown algae and are known to improve terrestrial crop growth and tolerance to abiotic stresses. Neopyropia yezoensis is the most important seaweed cultured species in Korea, and research is required to increase heat resistance as a solution against climate change. In this study, various extraction methods were used to obtain Sargassum horneri extract, and it was applied to Neopyropia yezoensis to evaluate the effect on physiological activity. Metabolites of Sargassum horneri were extracted by using four different methods: boiling (SBE), soaking (SSE), autoclaving (SAE) and ethanol (SEE). The SBE, SSE and SAE derived extracts showed increased tolerance to high-temperature stress that had inhibited the growth of Neopyropia yezoensis, and show improved growth compared to the control group. The SBE and SSE extraction methods improved the content of phycobiliprotein, but also the SBE increased superoxide dismutase (SOD) activity. Based on the results of this study, the boiling extraction method appears to be the most suitable method for the extraction of plants stimulants from Sargassum horneri.

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Effect of silicon in Pyropia yezoensis under temperature and irradiance stresses through antioxidant gene expression

Cited by 13 publications

References 28 publications

Silicon Alleviates Temperature Stresses in Poinsettia by Regulating Stomata, Photosynthesis, and Oxidative Damages

Silicon Alleviates Temperature Stresses in Poinsettia by Regulating Stomata, Photosynthesis, and Oxidative Damages

Role of nearshore benthic algae in the Lake Michigan silica cycle

Effects of extraction methods for a new source of biostimulant from Sargassum horneri on the growth of economically important red algae, Neopyropia yezoensis

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