The sex pheromone protoplast release-inducing protein (PR-IP) inducer and a sexual cell division-inducing pheromone-minus (SCD-IP-minus) that mediates the sexual reproduction of the heterothallic Closterium peracerosum-strigosum-littorale (C. psl) complex were investigated in this study. Recombinant PR-IP inducer produced by yeast cells was prepared and assayed for production of PR-IP and induc...

The aim of this study was to examine the effect positively charged (amine-modified) and negatively (carboxyl-modified) polystyrene nanoplastics (PS NPs) on nanostructural, nanomechanical, antioxidant responses marine diatom Cylindrotheca closterium. results showed that both types PS NPs, regardless surface charge, significantly inhibited growth C. closterium during short-term exposure (3 4 days...

In aquaculture, high-density seaweed farming brings higher economic benefits but also increases outbreaks of diatom felt. The effective control felt in has always been a research hotspot. This study selected two potential allelochemicals 2-hydroxycinnamic acid and quinic to explore their effects on Nitzschia closterium an Monostroma nitidum. results showed that had better inhibitory than the gr...

The desmid Closterium peracerosum-strigosum-littorale complex, which is the closest unicellular sister to land plants, is the best characterized of the charophycean green algae with respect to the process of sexual reproduction. To elucidate the molecular mechanism of intercellular communication during sexual reproduction, we created a normalized cDNA library from mixed cells of the sexual and ...

A sex pheromone, protoplast-release-inducing protein (PR-IP) inducer, of the Closterium peracerosum-strigosum-littorale complex is known to induce the release of PR-IP, from mating-type plus (mt+) cells during sexual reproduction. The purified PR-IP inducer was treated with trypsin to obtain internal peptides for determination of partial amino acid sequences. Using these sequences, oligonucleot...

JAMESON, DRUMMOND and COWARD [1922] showed that a marine diatom, Nitzschia closterium W, Sm., synthesises vitamin A when grown in Miquel's solution or sterilised sea-water in diffused sunlight. This work was, however, open to the criticism that the culture, one supplied by Dr Allen, Plymouth, was not pure, having been found to contain bacteria. Hence it was decided to repeat the work on a cultu...

The Closterium peracerosum-strigosum-littorale (C. psl.) complex is the best characterized charophycean alga with respect to the processes of sexual reproduction. We examined the effect of concanavalin A (Con A) on physiological and ultrastructural changes during the conjugation of the C. psl. complex. Two heterothallic gametangial cells formed a sexual pair as usual; however, the release of ga...