Diel nucleic acid synthesis and particulate DNA concentrations: Conflicts with division rate estimates by DNA accumulation1
1986; Wiley; Volume: 31; Issue: 3 Linguagem: Inglês
10.4319/lo.1986.31.3.0637
ISSN1939-5604
AutoresChristopher D. Winn, David M. Karl,
Tópico(s)Coastal and Marine Management
ResumoThe diel rate of microbial nucleic acid synthesis and the concentration of particulate DNA were measured at various locations in the oligotrophic Pacific Ocean. Net synthesis of RNA and DNA was observed over 24‐h periods at all locations investigated, but the actual rate sometimes varied with time of day. It is concluded that whenever possible, daily rates of synthesis should be determined from a series of consecutive incubations conducted over a complete 24‐h period. In addition, nonreplicating DNA comprised 75–90% of the total particulate DNA at the locations investigated. These results appear to preclude the use of light‐dependent DNA accumulation as a measure of phytoplankton growth rate in the oligotrophic oceans.
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