Lipopeptides from Bacillus atrophaeus MCM61 and melatonin suppress gray mold-induced oxidative stress in cut roses (Rosa hybrida L.) and improve vase life.

Application of melatonin and lipopeptides (LPs) derived from Bacillus strains is considered an efficient strategy to control plant diseases at both pre and postharvest stages. However, the combined application of melatonin and LPs has not been studied yet. Therefore, the present study presents the synergistic effect of melatonin and LPs produced by Bacillus atrophaeus strain MCM61 against gray mold disease and its impact on quality parameters and vase life of cut roses.

Ethylene controls cambium stem cell activity via promoting local auxin biosynthesis.

The vascular cambium is the main secondary meristem in plants that produces secondary phloem (outside) and xylem (inside) on opposing sides of the cambium. The phytohormone ethylene has been implicated in vascular cambium activity, but the regulatory network underlying ethylene-mediated cambial activity remains to be elucidated. Here, we found that PETAL MOVEMENT-RELATED PROTEIN1 (RhPMP1), an ethylene-inducible HOMEODOMAIN-LEUCINE ZIPPER I transcription factor in woody plant rose (Rosa hybrida), regulates local auxin biosynthesis and auxin transport to maintain cambial activity.

Screening of antimicrobial and insecticidal properties of essential oils extracted from three Tunisian aromatic and medicinal plants.

The essential oils (EOs) of , and have been screened for their insecticidal activity against , and and for their antimicrobial activity against Gram (+), Gram (-) bacteria and against yeast strain. EO showed good insecticidal activity with 24-h against (LC = 29.7) and against (66.