Growth, pigments, and biochemical composition of marine red alga Gracilaria crassa

Ravi S. Baghel, Puja Kumari, C. R.K. Reddy*, Bhavanath Jha

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


The marine red alga Gracilaria crassa was investigated for its proximate composition, minerals, fatty acids, amino acids, and agar content to decipher its nutritional implications. The growth performance and pigments were studied under different combinations of temperature and salinity. On a dry weight basis the total lipid content was 1.30 ± 0.05%, protein was 5.18 ± 0.64%, carbohydrate was 42.0 ± 1.2%, ash was 43.18 ± 1.15%, and agar content was 21.52 ± 0.73%. Appreciable amounts of macro-, micro-nutrients (K > Na, Ca, Mg, and Fe), and essential amino acids (Ileu, His, Thr, Leu, and Lys) were found. Palmitic, stearic acid, and arachidonic acid were major fatty acids detected. The alga showed maximum daily growth rate (DGR %) 5.8 ± 0.09% at 25°C, 35 ‰ salinity. The highest content of pigment R-phycoerythrin (444.7 ± 1.9#x03BC;g g−1 fresh weight (FW) basis) was obtained at 25 ‰ salinity at 35°C while that of R-phycocyanin (476.3± 2.3μg g−1 DW) at 30 ‰ salinity at 30°C. This study revealed that this alga can be utilized as a potential source for food and feed. The data generated on best growth conditions will be very useful for farming of G. crassa in open sea. This alga could be used for production of natural colorants at defined control condition.

Original languageEnglish
Pages (from-to)2143-2150
Number of pages8
JournalJournal of Applied Phycology
Issue number5
Early online date12 Feb 2014
Publication statusPublished - 17 Oct 2014

Bibliographical note

Funding Information:
R.S.Baghel.C.R.K.Reddy.B.Jha Academy of Scientific and Innovative Research (AcSIR), CSIR, New Delhi, India

Funding Information:
Acknowledgments The financial support received from project CSC 0116 BioEn is gratefully acknowledged. The second author (PK) gratefully acknowledges the CSIR, New Delhi for awarding the Senior Research Fellowship (SRF). Authors would like to acknowledge Head, Analytical sciences, CSIR-CSMCRI for providing instrumentation facilities.

Publisher Copyright:
© 2014, Springer Science+Business Media Dordrecht.


  • Amino acid
  • Fatty acids
  • Gracilaria crassa
  • Minerals
  • Natural pigments
  • Proximate composition


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