Chiang Mai Journal of Science

Print ISSN: 0125-2526 | eISSN : 2465-3845

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Nostochopsis lobatus Wood em. Geitler (Nostocales), Edible Algae in Northern Thailand

Sorrachat Thiamdao, Manita Motham, Jeeraporn Pekkoh, Lapatrada Mungmai and Yuwadee Peerapornpisal
* Author for corresponding; e-mail address: scboi017@chiangmai.ac.th
Volume: Vol.39 No.1 (JANUARY 2012)
Research Article
DOI:
Received: 5 January 2011, Revised: -, Accepted: 12 July 2011, Published: -

Citation: Thiamdao S., Motham M., Pekkoh J., Mungmai L. and Peerapornpisal Y., Nostochopsis lobatus Wood em. Geitler (Nostocales), Edible Algae in Northern Thailand, Chiang Mai Journal of Science, 2012; 39(1): 119-127.

Abstract

The  blue-green  alga, Nostochopsis  lobatus  Wood  em. Geitler, consists  of  a  dark  green  colony  with  a  mucilaginous  sheath  out-growth  and  is  attached  on  rocks. It  is  usually  found  together  with  Cladophora  spp.  and  Microspora  spp.  in  some  shallow  rivers  or  streams  in certain  water  resources, especially  in  the  Nan  River  of  Nan  Province  in northern  Thailand. Scattered  branches  with  the  lateral  branch  stretching  parallel  and  upward  to  the  main  filament  in  a  polysaccharide  sheath  are  their  unique  descriptive  characteristics. N. lobatus  can  rapidly  grow  under  clear  water  during  both  the  cold-dry  season  and  the  hot-dry  season  in  which  water  quality  appears  to  be  clean  to  moderate. Local  people  have  prepared  it  as  a  salad  dish  called  “Yum Lon”. The  study  of  the  bioactive  compounds  and  important  compounds  in  N. lobatus  showed  a  high  polysaccharide  content  of  160.02  DP  on  BG11  medium, 76.77 DP  in  the  samples  of  the  Nan  River  and  in  some  pigments; chlorophyll  a: 8.26 mg/g  cell  dw, carotenoid: 0.339 mg/g  cell  dw, phycocyanin: 61.58 mg/g  cell  and  allophycocyanin: 65.38 mg/g  cell  dw. Moreover, N. lobatus  was  found  to  contain  a  high  protein  content  of  19.10% dw, which  is as  high  as  freshwater  fish. It  was  found  to  be  6,405  mg/100 g  cell  dw  of  calcium, which  was  as  high  in  content  levels  of  certain  vitamins  and  minerals, especially  selenium, a  well-known  antioxidant (37 μg/100 g dw). Thus, N. lobatus  could  come  to be seen  as  an  appropriate  food  source, which  could  grow  well  on  semi-solid  BG11  media  on  the  laboratory  scale. Furthermore, these  algae  should  be  considered  as  a  source of  supplemental  food, as  a  therapeutic  agent  or  for  use  as  an  ingredient  in  cosmetics  in  the  future.

Keywords: Nostochopsis lobatus, edible algae, Northern Thailand, Polysaccharide, bioactive compounds

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