Adaptation of the Photosynthetic Unit of Purple Bacteria to Changes of Light Illumination Intensities

Brotosudarmo, Tatas Hardo Panintingjati; Limantara, Leenawaty; Heriyanto, Heriyanto; Prihastyanti, Monika Nur Utami

doi:10.1016/j.proche.2015.03.056

Cited by 17 publications

(10 citation statements)

References 37 publications

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“…According to visible spectrum observation of pigment extracts, pigment intensity could follow these trends: AB SHB PI and UGB. This qualitative pigment analysis was in accordance with semi-quantitative analysis Table 3 , The cause of inferior pigment concentration of the samples, especially UGB and PI, may be ascribed to the different blade size and morphological appearance that may also relate to different life stage/maturity, although there are other possible factors such as nutrient and salinity 43 . Gerasimenko et al 44 revealed that the content of photosynthetic pigments carotenoids and chlorophylls in brown seaweed Costaria costata increased with age.…”

Section: Lipid-soluble Componentssupporting

confidence: 82%

Water and Lipid-Soluble Component Profile of <i>Sargassum cristaefolium</i> from Different Coastal Areas in Indonesia with Potential for Developing Functional Ingredient

et al. 2020

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logical activities of Sargassum extract or purified compounds include anticancer, antibacterial, antifungal, antiinflammatory, anticoagulant, antioxidant, hypoglycemic, hypolipidemic, and hepatoprotective 3. Sargassum genus is widely spread in various water areas in Indonesia. Also, it has promising biomass potential because of the good growth in a tropical area. Since the chemical composition of seaweeds is strongly influenced by their environmental conditions 5 10 , the evaluation of different marine habitats on seaweed chemical content is important to be conducted. This is related to the bioprospecting strategy for seaweed industry development, especially for future functional ingredient sources. This

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Section: Lipid-soluble Componentssupporting

confidence: 82%

Water and Lipid-Soluble Component Profile of <i>Sargassum cristaefolium</i> from Different Coastal Areas in Indonesia with Potential for Developing Functional Ingredient

et al. 2020

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“…4, under the HL or LL condition, both WT and DpucBAd showed the similar absorption spectra. The absorption maxima of BChl a and Car (spirilloxanthin series) were, respectively, assigned to 377, 590, 804, 860 nm as well as 465, 492, 524 nm, which were consistent with the living cells absorption spectrum of CGA009 (7). Compared to intact cells, the maximal peaks of absorption spectra in protein extract were more characteristic and the background values of absorption spectra were lower.…”

Section: The Effect Of Pucbad Deletion On Pigment-protein Complex Synsupporting

confidence: 73%

“…Purple bacteria have evolved a number of mechanisms to allow them to survive in changing light environment by regulating the amounts or abundance, size and compositions of LH2, the ratio of LH2 to LH1‐RC core complexes . Some species can alter their spectroscopic forms of LH2 in response to “stressed” conditions such as LH3 or LH4.…”

Section: Introductionmentioning

confidence: 99%

The Growth‐promoting Mechanism of Unusual Spectroscopic Form of LH2 (LH4) from Rhodopseudomonas palustris CGA009 in Low Light

Zhao

Yang

et al. 2019

Photochem & Photobiology

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The experimental evidence for the growth‐promoting mechanism and the efficiency of energy transfer (EET) of LH4 under low light are still not available. To elucidate the light adaption mechanism of LH4, we deleted the genes pucBAd involved in the synthesis of the α/β polypeptides of LH4 in Rhodopseudomonas palustris CGA009. Compared to wild strain, the growth rate of pucBAd mutant significantly decreased under low light, while there were no significant changes in the growth rate, the contents and compositions of photopigments, absorption spectra of cell lysates under high light. Moreover, the fluorescence quantum efficiency (FQE) was used to further compare the EET between LH2 and LH4. The FQE in LH4 increased up to 1.5‐fold than did in LH2. Collectively, this study showed that LH4 could provide more and high energetic state photons for promoting bacterial phototrophic growth in response to low‐light environment.

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“…4). The light-limiting effect of the dense vegetation of S. alterni ora directly restricts the growth of PSB (He et al 2012;Li et al 2014a;Brotosudarmo et al 2015). Indeed, the absolute abundances of Chlorobi and the class Chloro exi were signi cantly negatively correlated with the aboveground biomass of plants (Fig.…”

Section: Discussionmentioning

confidence: 93%

Alteration of Nutrient Substrates and Absence of Seawater Due to Coastal Embankments Affects Soil Microbial Communities in Salt Marshes of Eastern China

Feng

Qiao

Xia

et al. 2021

Preprint

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Aims: Although the influence of coastal embankments on soil physicochemical properties and carbon (C) and nitrogen (N) cycling has been widely studied, the mechanisms of their effects on the soil microbial ecology are still poorly understood. Thus, the aim of this study was to investigate variations in soil bacterial and archaeal communities between natural and embanked saltmarshes, as well as the determinants that drive these variations.Methods: 16S rRNA gene sequence analysis was performed to assess the impacts of embankments on the bacterial and archaeal communities of the invasive Spartina alterniflora Loisel., as well as native Suaeda salsa (L.) Pall. and Phragmites australis (Cav.) Trin. ex Steud. saltmarshes in the coastal China.Results: Embankments significantly decreased the Simpson diversity index of the S. alterniflora saltmarsh, while increasing the OTU richness in the P. australis saltmarsh. Additionally, the bacterial and archaeal community compositions in the embanked S. alterniflora and P. australis saltmarshes were considerably modified. However, no variations were found between the bacterial and archaeal communities of the natural and embanked S. salsa saltmarshes.Conclusions: These results were possibly because embankments decreased the soil nutrient substrates (e.g., soil organic C and N) dramatically in the S. alterniflora saltmarsh, while increased soil nutrient substrates significantly in the P. australis saltmarsh. However, embankments had a negligible effect on the soil nutrient substrates in the S. salsa saltmarsh. Moreover, embankments increased the abundance of Betaproteobacteria, and decreased the abundance of sulfur- and sodium-dependent bacteria due to the dramatic change in soil physicochemical properties.

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Adaptation of the Photosynthetic Unit of Purple Bacteria to Changes of Light Illumination Intensities

Cited by 17 publications

References 37 publications

Water and Lipid-Soluble Component Profile of <i>Sargassum cristaefolium</i> from Different Coastal Areas in Indonesia with Potential for Developing Functional Ingredient

Water and Lipid-Soluble Component Profile of <i>Sargassum cristaefolium</i> from Different Coastal Areas in Indonesia with Potential for Developing Functional Ingredient

The Growth‐promoting Mechanism of Unusual Spectroscopic Form of LH2 (LH4) from Rhodopseudomonas palustris CGA009 in Low Light

Alteration of Nutrient Substrates and Absence of Seawater Due to Coastal Embankments Affects Soil Microbial Communities in Salt Marshes of Eastern China

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