Abstract:

In this study, Rhodopseudomonas palustris G3 was domesticated by enrichment of sodium selenite. The
selenium-enriched culture of Rhodopseudomonas palustris G3 was introduced into the growth medium for a second selenium
enrichment. Meanwhile, we explored the effect of this selenium-enriched culture on the growth of Flammulina velutipes as
well as the conversion percentage of organic selenium and nutritional components in Rhodopseudomonas palustris G3. The
results showed that the selenium-enriched culture of Rhodopseudomonas palustris G3 could not only promote the growth
of Flammulina velutipes, but also shorten the growth cycle by approximately 1 to 7 days. Biomass was increased by 1.86%
to 23.28%, dry matter was increased by 2.91% to 28.78%, and the conversion percentage of organic selenium reached up to
98.57%. Amino acids in the selenium-enriched Flammulina velutipes were increased by 73.4%, crude protein by 14.74%,
crude fat by 53.98%, and crude polysaccharides by 18.84%.

Key words: Rhodopseudomonas palustris G3, Flammulina velutipes, selenium enrichment, nutrients