Fong N J, Burgess M L, Barrow K D, Glenn D R
CRC for Food Industry Innovation, University of New South Wales, Sydney, Australia.
Appl Microbiol Biotechnol. 2001 Sep;56(5-6):750-6. doi: 10.1007/s002530100739.
A psychrotrophic strain of Arthrobacter agilis, isolated from Antarctic sea ice, grows from 5 degrees C to 40 degrees C and in culture media containing 0-10% (w/v) NaCl. Maximum growth rate occurred at 30-35 degrees C with a drastic decline as the cultivation temperatures diverged. Adaptation to extremes of low temperature may be partially attributed to the production of the C-50 carotenoid bacterioruberin, and its glycosylated derivatives. Lowering of the cultivation temperature resulted in a concomitant increase in carotenoid production, which may contribute to membrane stabilisation at low temperature. Maximum biomass accumulation occurred at 5-30 degrees C with a tenfold reduction at 40 degrees C. Changes in growth rates were minimal in culture media containing 0-2% (w/v) NaCl at 10 degrees C while a gradual decrease in growth rates occurred at higher salinity. Biomass accumulation at different salinity followed a trend similar to that observed with different cultivation temperatures. Maximum biomass accumulation was observed in culture media containing 0-5% (w/v) NaCl with a tenfold reduction at 10% (w/v) NaCl. Carotenoid production also decreased as salinity increased.
从南极海冰中分离出的一株嗜冷敏捷节杆菌，生长温度范围为5℃至40℃，可在含0 - 10%（w/v）氯化钠的培养基中生长。最大生长速率出现在30 - 35℃，随着培养温度偏离该范围，生长速率急剧下降。对极端低温的适应可能部分归因于C - 50类胡萝卜素细菌红素及其糖基化衍生物的产生。培养温度降低会导致类胡萝卜素产量相应增加，这可能有助于在低温下稳定细胞膜。最大生物量积累出现在5 - 30℃，在40℃时减少了十倍。在含0 - 2%（w/v）氯化钠的培养基中，10℃时生长速率变化最小，而在盐度较高时生长速率逐渐降低。不同盐度下的生物量积累趋势与不同培养温度下观察到的趋势相似。在含0 - 5%（w/v）氯化钠的培养基中观察到最大生物量积累，在10%（w/v）氯化钠时减少了十倍。类胡萝卜素产量也随着盐度增加而降低。
