Control of Gametic Differentiation and Activity by Light in Chlamydomonas reinhardtii

概要

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Laboratory strains of Chlamydomonas reinhardtii, which are descendants of a 1945 isolate by G.M.Smith(Harris 1989), were divided into two groups depending upon whether the vegetative cells require light to differentiate into gametes under ammonium ion-starved conditions. Light-dependent(LD) strains were unable to become gametes in the dark, while light-independent(LI) strains could do so. All the wild-type strains isolated recently from the field showed light-dependency, suggesting that the LD-phenotype is the wild-type. The LD-cells failed to acquire flagellar agglutinability, to accumulate cell body agglutinins, or to form mating structures in the dark, but did so rapidly after transfer to light. Moreover, the light-induced LD-gametes, but not the LI-gametes, lost their mating ability, cell body agglutinins, and mating structures after transfer to darkness, indicating that the LD-cells require light not only for gametic differentiation but also for maintenance of gametic activity.
日本植物生理学会の論文