1 research outputs found
The cultivation of L. edodes using seasonal waste
Å itakÄ jeb Lentinula edodes ir augstvÄrtÄ«ga ÄdamÄ sÄne. SÄni izmanoto medicÄ«nÄ, pÄtniecÄ«bÄ un kulinÄrijÄ tÄs anti-kancerogÄno, holesterÄ«na lÄ«meni mazinoÅ”o un imunitÄti stimulÄjoÅ”o Ä«paŔību dÄļ (Kang 2013). Katru gadu LatvijÄ uzkrÄjas liels daudzums dabas sezonÄlo atkritumu. Å ie resursi paliek neizmantoti, lai gan visiem ir brÄ«vi pieejami. JÄnoskaidro, vai tos ir iespÄjams izmantot laba sÄjmateriÄla veidoÅ”anai, Å”itakÄ sÄÅu audzÄÅ”anai. Laba sÄjmateriÄla izmantoÅ”ana nodroÅ”ina labu sÄÅu,augļķermeÅu, ražu(MatjuÅ”kova un Raipulis 1999). Darba mÄrÄ·is bija izpÄtÄ«t kÄ dažÄdu dabas sezonÄlo atkritumu piedevu pievienoÅ”ana sintÄtikajai barotnei un skaidu-kliju substrÄtam ietekmÄ L.edodes micÄlija augÅ”anu. EksperimentÄli pÄrbaudÄ«ta 2,5% brÅ«naļģu piedevas un 2,5% kļavu lapu piedevas ietekme uz sintÄtiskajÄ barotnÄ augoÅ”iem L.edodes celmiem; pÄrbaudÄ«ta 2,5% kļavu lapu piedevas ietekme uz skaidu-kliju substrÄtÄ augoÅ”iem L.edodes celmiem. Noskaidrots, vai brÅ«naļģu ekstrakta koncentrÄcijas palielinÄÅ”anai ir pozitÄ«va ietekme uz micÄlija augÅ”anu. RezultÄti ļauj secinÄt, ka 2,5% brÅ«naļģu piedevas un 2,5% kļavu lapu piedevas pozitÄ«vi ietekmÄ L.edodes micÄlija augÅ”anu sintÄtiskajÄ barotnÄ un skaidu-kliju substrÄtÄ; brÅ«naļģu ekstrakta koncentrÄcijas palielinÄÅ”anai ir pozitÄ«va ietekme uz micÄlija augÅ”anu. BarotnÄs un substrÄtÄ ar dabas sezonÄlo atkritumu piedevu micÄlijs auga vidÄji par 20% ÄtrÄk, nekÄ kontroles barotnÄs un kontroles substrÄtÄ bez tÄs. Lai gan kļavu lapu piedeva labÄk par brÅ«naļģu piedevu veicinÄja micÄlija augÅ”anu, novÄrotÄ starpÄ«ba bija nenozÄ«mÄ«ga. Darbs izstrÄdÄts Latvijas UniversitÄtes MikrobioloÄ£ijas un biotehnoloÄ£ijas katedrÄ no 2015. gada oktobrim lÄ«dz 2016. gada jÅ«nijam, Dr. biol., prof. Nataļjas MatjuÅ”kovas vadÄ«bÄ.Shiitake (Lentinula edodes) are worldwide well-known edible mushrooms. They are widely used in traditional medicine, research and cooking due to their anti-carcinogenic, cholesterol-lowering effect and immunity-stimulating properties. (Kang 2013). Each year, large quantities of natural seasonal waste accumulate in Latvia. Largely, these resources remain unused, even though they are freely available. Thus, it is of importance to investigate whether particular types of seasonal waste could be successfully incorporated in the medium used to grow Shiitake mushrooms nowadays to improve their growth rates. It has been previously demonstrated that the composition of the substrates used for Shiitake cultivation affect the yield (MatjuÅ”kova and Raipulis 1999). The aim of this study was to determine how the addition of natural seasonal waste to a synthetic or sawdust-bran substrate affects the mycelial growth of L.edodes. To test this, various L.edodes strains were grown on the synthetic substrate enriched with either 2.5% supplement of brown algae or 2.5% additive of maple leaves; similarly, L.edodes grown in the woodchip-wheat bran substrate were supplemented with 2.5% additive of maple leaves. Additionally, the effect of the concentration of the extract of brown algae added to the substrate was investigated to see if this has a positive effect on the mycelial growth. The results suggest that the addition of both brown algae and maple leaves to the synthetic or sawdust-bran substrates has a positive effect on the mycelial growth of the L. edodes. Moreover, the use of a higher concentration of the extract of brown algae yields larger mycelium. It was demonstrated that in the substrates with added supplements mycelium grew on average 20% faster than in the controls. Although the additive of maple leaves promoted mycelial growth better than that of brown algae, the observed differences were insignificant. This Bachelor Project was carried out at the Department of Microbiology and Biotechnology, University of Latvia, from October 2015 to June 2016, supervised by Dr. Biol., prof. Natalia MatjuÅ”kova