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  • 2010-2014  (8)
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  • 1
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    Preliminary study on flg22-induced defense responses in female gametophytes of Saccharina japonica (Phaeophyta) (2013)
    Springer
    In:  Journal of Applied Phycology, 25 (4). pp. 1215-1223.
    Details
    Publication Date: 2017-07-03
    Description: Flg22, which is the most conserved 22-amino acid peptide in the N-terminal part of flagellin, functions as an effective elicitor in higher plants. Marine algae and higher plants share some conserved characteristics on defense response pathways. Flg22-induced defense responses were investigated in female gametophytes of Saccharina japonica. Condensation of chloroplasts and thickened cell walls, as well as relatively stable structures of mitochondria and nucleus indicated that there were hypersensitive programmed cell death occurred after induction by flg22. By using luminol-dependent luminescence detection method, rapid release of H2O2 was detected in the induced female gametophytes and reached a peak concentration of about 46 μM at 2 h. Reactive oxygen species production was also observed histologically using the fluorescent dye 2′,7′-dichlorofluorescein diacetate, showing a consistent result with quantitative analysis of H2O2. Furthermore, results of antioxidant enzyme activities indicated that there was a trend in the order of catalase 〉 superoxide dismutase 〉 glutathione peroxidase. Finally, high level phenol content of cell-free extracts was found after flg22 induction. According to our results, flg22 could be an effective elicitor which could induce defense responses in female gametophytes of S. japonica.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s10811-012-9911-4
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Early development of grateloupia turuturu (Halymeniaceae, Rhodophyta) (2012)
    Science Press ; Springer
    In:  Chinese Journal of Oceanology and Limnology, 30 (2). pp. 264-268.
    Details
    Publication Date: 2019-01-21
    Description: Grateloupia turuturu is a commercial red alga with potential value in nutraceuticals and pharmaceuticals. To supplement information on its life history and verify whether carpospores can be used for seedling culture, early development of G. turuturu was investigated under culture conditions (27°C, 10–13 μol/(m2·s) in irradiance, photoperiod 10:14 h L:D). Three physiological stages were recognized by continuous microscopic observation: division stage, discoid crust stage, and juvenile seedling stage. At the beginning of the division stage, the carpospores developed germ tubes into which the carpospore protoplasm was evacuated, and then the carpospore protoplasm in the germ tubes began to divide continuously until discoid crusts formed. Finally, upright thalli appeared on the discoid crusts and developed into juvenile seedlings. It took about 60 days for carpospores to develop into juvenile seedlings. The growth parameters, including germination rate for carpospores and discoid crust diameter, were recorded. These results contribute more information on the life cycle, and at the same time are of great significance in the scaling-up of artificial seedling cultures of G. turuturu.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s00343-012-1071-5
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Effects of temperature and irradiance on filament development of Grateloupia turuturu (Halymeniaceae, Rhodophyta) (2013)
    Springer
    In:  Journal of Applied Phycology, 26 (6). pp. 1881-1886.
    Details
    Publication Date: 2018-06-01
    Description: Grateloupia turuturu Yamada is an economically valuable red alga with great potential in nutraceuticals and pharmaceuticals. Filaments of G. turuturu are of primary importance in germplasm preservation and sporeling culture, although filaments were not present in its life cycle. In this study, effects of temperature (10, 15, 20, 25, and 30 °C) and irradiance (10, 30, 60, and 90 μmol photons m−2 s−1) with photoperiod 10:14 h (light/dark) on filament development were investigated. Our results indicated that 25 °C was the optimal temperature for the formation of discoid crusts regardless of the irradiance. Conditions of 20 °C and 60 μmol photons m−2 s−1 promoted the development of discoid crusts and formation of upright thalli.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s10811-013-0018-3
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Early development of Silvetia babingtonii (Fucales, Phaeophyceae) (2014)
    Springer
    In:  Journal of Ocean University of China, 13 (4). pp. 677-682.
    Details
    Publication Date: 2018-05-04
    Description: Silvetia babingtonii is a potentially economic brown alga for sources of food and high-value added utilization. So far, sporeling nursery and field cultivation has not been successful. The lack of knowledge on development and life cycle of this alga hinder the development of techniques for the sporeings and cultivation. In this study, internal structure of oogonium and antherium of S. babingtonii was observed with hematoxylin and eosin staining and through microscope. Meanwhile, early development from zygotes to juvenile sporelings was studied at 20 degrees C under 60-100 mu mol photons m(-2) s(-1). Zygotes germinated and divided into thallus and rhizoid cells. The larger thallus cells further divided and developed into juvenile sporelings; while the smaller rhizoid cells divided and elongated into rhizoid hairs. These findings documented the life cycle of S. babingtonii and provided fundamental knowledge for sporeling nursery in the near future.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s11802-014-2220-6
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    Does the release from ecological pressure decrease susceptibility to fouling in invasive populations of Gracilaria vermiculophylla? (2014)
    In:  [Poster] In: 15. Scientific Conference of the Phycology Section of the German Botanical Society, Stralsund, 23.-26.02.2014, Stralsund, Germany .
    Details
    Publication Date: 2015-01-08
    Type: Conference or Workshop Item , NonPeerReviewed
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    OceanRep: Poster
  • 6
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    Are invasive populations of a cosmopolitan algal species less susceptible to fouling than native? (2014)
    In:  [Poster] In: International Coastal Biology Congress, 26.-30.09.2014, Yantai, China .
    Details
    Publication Date: 2014-12-04
    Type: Conference or Workshop Item , NonPeerReviewed
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    OceanRep: Poster
  • 7
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    Hyperammonia induces specific liver injury through an intrinsic Ca2+-independent apoptosis pathway (2014)
    BioMed Central
    Details
    Publication Date: 2014-08-23
    Description: Background: Numerous pathological processes that affect liver function in patients with liver failure have been identified. Among them, hyperammonia is one of the most common phenomena.The purpose of this study was to determine whether hyperammonia could induced specific liver injury. Methods: Hyperammonemic cells were established using NH4Cl. The cells were assessed by MTT, ELISA, and flow cytometric analyses. The expression levels of selected genes and proteins were confirmed by quantitative RT-PCR and western blot analyses. Results: The effects of 20 mM NH4Cl pretreatment on the cell proliferation and apoptosis of primary hepatocytes and other cells were performed by MTT assays and flow cytometric analyses. Significant increasing in cytotoxicity and apoptosis were only observed in hepatocytes. The cell damage was reduced after adding BAPTA-AM but unchanged after adding EGTA. The expression levels of caspase-3, cytochrome C, calmodulin, and inducible nitric oxide synthase were increased and that of bcl-2 was reduced. The Na+-K+-ATPase activities in hyperammonia liver cells was no signiaficant difference compaired with the control group, but was decreased in astrocytes. NH4Cl pretreatment of primary hepatocytes promoted the activation of mitochondrial permeability transition pores and the mitochondria swelled irregularly. Conclusions: Hyperammonia induces specific liver injury through an intrinsic Ca2+-independent apoptosis pathway.
    Electronic ISSN: 1471-230X
    Topics: Medicine
    Published by BioMed Central
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  • 8
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    Ferrimagnetism in the double perovskite Ca2FeOsO6: A density functional study (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-08-12
    Description: Author(s): Hongbo Wang, Shasha Zhu, Xuedong Ou, and Hua Wu Using density functional calculations, we find that the newly synthesized Ca2FeOsO6 has the high-spin Fe3+ (3d5)-Os5+ (5d3) state. The octahedral Os5+ ion has a large intrinsic exchange splitting, and its t2g↑3 configuration makes the spin-orbit coupling ineffective. Moreover, there is a strong anti... [Phys. Rev. B 90, 054406] Published Mon Aug 11, 2014
    Keywords: Magnetism
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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