2-methylisoborneol and geosmin, the main sources of soil odor, inhibit the germination of brassicaceae seeds

Identification of odorous compounds from nine fermentor-cultivated Streptomyces strains

“…strain isolated from rotten grapes and revealed that the chiral compound geosmin is in the (-)-form much more odoriferous than in the (+)-one (Darriet et al 2001). Geosmin production was also studied in terms of its genetic determinants (Saadoun and El-Migdadi 1998) and it was found to inhibit plant seed germination (Ogura et al 2000).As part of an extensive research of physiology of different Streptomyces strains, producers of important biologically active compounds, we studied the effect of the type of cultivation on the total odor composition in selected streptomycetes. At present, a total of 67 compounds comprising monoterpenes, hydrocarbons, oxygenated compounds and aromatics have been identified as odor components in batch cultures of different species of Streptomyces (Řezanka et al 1994; Řezanka and Votruba 1998a,b;Jáchymová et al 2002).…”

“…strain isolated from rotten grapes and revealed that the chiral compound geosmin is in the (-)-form much more odoriferous than in the (+)-one (Darriet et al 2001). Geosmin production was also studied in terms of its genetic determinants (Saadoun and El-Migdadi 1998) and it was found to inhibit plant seed germination (Ogura et al 2000).…”

Access to Enantiomerically Pure Intermediates for (−)-Geosmin Synthesis Starting from (4aS,5S)-4,4a,5,6,7,8-Hexahydro-5-hydroxy-4a-methyl-naphthalen-2(3H)-one

“…The recently increasing demand for (")-geosmin (1), 1) a musty odor component in tap water, for studies on environmental protection 2) and its biological eŠect 3,4) have so far prompted expeditious synthetic routes. Among the synthetic studies on this substance, Tanaka, Oritani and co-workers' extensive works are outstanding.…”

Odours from friends and foes: ecological consequences of volatiles from soil-borne fungion plant growth and defence against herbivoress

“…Since the first report of Ryu et al (2003), a growing body of studies has reported the effects of bacterial and fungal VOCs on plant growth and development (Farag et al, 2006;Bitas et al, 2013;Garnica-Vergara et al, 2015;Kanchiswamy et al, 2015b;Fincheira and Quiroz, 2018). At the seed stage, microbial VOCs can accelerate or delay germination (Ogura et al, 2000;Hung et al, 2014;Cordovez et al, 2017). The effects on plant growth ranged from plant death (Blom et al, 2011;Weise et al, 2013) up to ten-fold biomass increase (Paul and Park, 2013).…”

“…Remarkably, plants can also respond to microorganisms from a distance via the perception of microbial volatiles, encompassing volatile organic compounds (VOCs) and inorganic volatile compounds such as CO 2 and NO (Schmidt et al, 2015). Already at the seed stage, microbial volatiles can affect plant development and delay seed germination (Ogura et al, 2000;Hung et al, 2014). At later growth stages, exposure to microbial volatiles may affect flowering time positively or negatively (Xie et al, 2009;Sánchez-López et al, 2016).…”