Aspinolide B is a polyketide synthase-derived aspinolide that has been found in T. arundinaceum and has plant growth regulatory activity.1,2 It promotes the growth of S. lycopersicum lateral roots when used at a concentration of 50 µg/ml.2
References:
[1].Cardoza, R.E., McCormick, S.P., Izquierdo-Bueno, I., et al.Identification of polyketide synthase genes required for aspinolide biosynthesis in Trichoderma arundinaceumAppl. Microbiol. Biotechnol.106(21)7153-7171(2022).
[2].Malmierca, M.G., Barua, J., McCormick, S.P., et al.Novel aspinolide production by Trichoderma arundinaceum with a potential role in Botrytis cinerea antagonistic activity and plant defence primingEnviron. Microbiol.17(4)1103-1118(2015).