Effects of temperature on growth, pigment composition and protein content of an Antarctic Cyanobacterium Nostoc commune
English

2012 Nusantara Bioscience  
Tripathi R, Dhuldhaj UP, Singh S. 2012. Short Communication: Effects of temperature on growth, pigment composition and protein content of an Antarctic Cyanobacterium Nostoc commune. Nusantara Bioscience 4: 134-137. Effect of temperature variation on biomass accumulation, pigment composition and protein content were studied for the cyanobacterium Nostoc commune, isolated from Antarctica. Results confirmed the psychrotrophic behavior (optimum growth temperature 25 0 C) of the cyanobacterium. Low
more » ... yanobacterium. Low temperature increased the duration of lag phase and exponential growth phase. Maximum increase in biomass was recorded on 24 th day at 25 0 C and on 12 th day at 5 0 C. The downshift from 25 to 5 0 C had almost negligible effect on chl a content. Maximal protein content was recorded for cultures growing at 5 0 C on 12 th day. The carotenoids/chl a ratio was maximum (2.48) at 5 0 C on 9 th day. It remained almost constant for cultures growing at 5 and 35 0 C. There was an induction in protein synthesis following downshift in temperature from 25 to 5•C. Abstrak. Tripathi R, Dhuldhaj UP, Singh S. 2012. Komunikasi singkat: Pengaruh suhu terhadap pertumbuhan, komposisi pigmen dan kandungan protein cyanobacterium dari Antartika Nostoc commune. Bioscience Nusantara 4: 134-137. Pengaruh variasi suhu terhadap akumulasi biomassa, komposisi pigmen dan kandungan protein dipelajari pada cyanobacterium Nostoc komune, yang diisolasi dari Antartika. Hasil penelitian menegaskan perilaku psikrotrofik (suhu pertumbuhan optimum 25•C) dari cyanobacterium tersebut. Suhu rendah meningkatkan durasi fase lambat dan fase pertumbuhan eksponensial. Peningkatan biomassa maksimal tercatat hari ke-24 pada 25•C dan hari ke-12 pada 5•C. Penurunan suhu dari 25 ke 5•C hampir tidak berpengaruh pada kandungan chl a. Kandungan protein tertinggi tercatat pada kultur yang tumbuh pada 5•C, hari ke-12. Rasio karotenoid/chl a tertinggi (2,48) terjadi pada 5•C, hari ke-9. Hal ini hampir selalu konstan untuk kultur yang tumbuh pada 5-35•C. Terdapat induksi dalam sintesis protein mengikuti penurunan suhu dari 25 ke 5•C.
doi:10.13057/nusbiosci/n040308 fatcat:nlkhdm7dafb7dcekb2ja6wmd4y