Isolation of isolactarane sesquiterpenes from a <i>Phlebia tremellosa</i> culture filtrate and their growth promotion effects on lettuce roots

Abstract

The ethyl acetate extract of the culture filtrate of Phlebia tremellosa promoted elongation of the lateral roots of lettuce seedlings at 250 µg/mL. We purified two compounds that promote root elongation by using activity-guided chromatographic fractionation. On the basis of spectroscopic analyses, these compounds were identified to be isolactarane sesquiterpenes derived from the dehydrogenation of merulactone, which was previously isolated from the same species. We named the purified compounds phlelactones A and B. Phlelactones A and B promoted primary root elongation at 100-300 and 10-30 µg/mL and the elongation and formation of lateral roots at 300-1000 and 30-100 µg/mL, respectively.

Evaluation of potential and rate of the germination of wheat seeds (Triticum aestivum L) treated with bifunctional growth regulators under water stress

“…Water stress (drought), being the second major factor in yield decline after diseases, alters the physiological, morphological, biochemical and molecular traits of plants (Rijala et al, 2021;Dhankher and Foyer, 2018;Dutta et al, 2016). In recent years, a large number of natural and synthetic plant growth regulators (PGR) with a wide range of biological, including cytokinin, activity have been tested, which increase the productivity of cultivated plants due to structural similarity with natural plant hormones and resistance to a complex of unfavorable environmental factors (Oshchepkov et al, 2020;Ishihara et al, 2019;Oh and Hoshi, 2019;Nakagawa et al, 2021). The data obtained as a result of biological tests (Kalistratova et al, 2021) indicate that the synthesized bifunctional compounds of a number of carbamates and oxamates have pronounced antistress and regulatory activity.…”

Identification of two phthalide derivatives and an oxindole compound isolated from the edible mushroom <i>Pleurotus ostreatus</i> and their inhibitory activities against plant pathogenic microorganisms

“…3 – 5 ) These metabolites possess different biological activities, such as hypoglycemic, antibacterial, antioxidant, and teratogenic. 6 , 7 ) Additionally, mushroom metabolites exhibit plant growth promoting activities 8 ) and inhibitory activities on tyrosinase. 9 ) While mushrooms are tapped for nutritional benefits and therapeutic applications, they are also promising in sustainable agriculture as a source of secondary metabolites with inhibitory activities against plant pathogens.…”