1887

Abstract

sp. PCC 6803 exposed to chill (5 °C)-light (100 μmol photons m s) stress loses its ability to reinitiate growth. From a random insertion mutant library of sp. PCC 6803, a mutant showing increased sensitivity to chill plus light was isolated. Mutant reconstruction and complementation with the wild-type gene confirmed the role of in maintaining chill-light tolerance. At 15 °C, the autotrophic and mixotrophic growth of the mutant were both inhibited, paralleled by decreased photosynthetic activity. The expression of was upregulated in sp. PCC 6803 after transfer from 30 to 15 °C at a photosynthetic photon flux density of 30 μmol photons m s. , named (aobacterial ld esistance gene)-, may be required for cold acclimation of cyanobacteria in light.

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2007-04-01
2020-08-09
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