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Key message: Thchit42 constitutive expression for fungal resistance showed synchronisation with leaf augmentation and transcriptome analysis revealed the Longifolia and Zinc finger RICESLEEPER gene is responsible for plant growth and development. Pelargonium graveolens essential oil possesses significant attributes, known for perfumery and aromatherapy. However, optimal yield and propagation are predominantly hindered by biotic stress. All biotechnological approaches have yet to prove effective in addressing fungal resistance. The current study developed transgenic geranium bridging molecular mechanism of fungal resistance and plant growth by introducing cassette 35S::Thchit42. Furthermore, 120 independently putative transformed explants were regenerated on kanamycin fortified medium. Primarily transgenic lines were demonstrated peak pathogenicity and antifungal activity against formidable Colletotrichum gloeosporioides and Fusarium oxysporum. Additionally, phenotypic analysis revealed ~ 2fold increase in leaf size and ~ 2.1fold enhanced oil content. To elucidate the molecular mechanisms for genotypic cause, de novo transcriptional profiles were analyzed to indicate that the auxin-regulated longifolia gene is accountable for augmentation in leaf size, and zinc finger (ZF) RICESLEEPER attributes growth upregulation. Collectively, data provides valuable insights into unravelling the mechanism of Thchit42-mediated crosstalk between morphological and chemical alteration in transgenic plants. This knowledge might create novel opportunities to cultivate fungal-resistant geranium throughout all seasons to fulfil demand. [ABSTRACT FROM AUTHOR]

Patchouli (Pogostemon cablin), is an industrially important aromatic plant that produces patchouli oil. The present experiment aimed to generate polyploid plants of patchouli with increased herb yield, oil production, and higher patchouli alcohol content. In the present study, colchicine, a chemical compound known to induce polyploidy was used at concentrations of 0.2% and 0.3% for 48 h. The diploid variety CIM-Shrestha (2n = 2X = 32) was used as the starting point. Polyploidy was successfully induced in vitro conditions and confirmed through various analyses including chromosome counting, anatomical, morphological, and gene expression studies. Treating the diploid callus with 0.2% colchicine resulted in viable and stable tetraploid seedlings. These tetraploids had a chromosomal count of 2n = 4x = 64. Tetraploids exhibited distinct morphological, anatomical, and chemical characteristics, such as thicker leaves, more oil glands, higher chloroplast numbers, larger stomata size, patchouli alcohol, and α-Guaiene. In field conditions, the induced tetraploids remained stable and the majority of tetraploid lines showed higher oil content and patchouli alcohol concentrations compared to diploid plants, although herb yield was lower in tetraploids. In the gene expression study, five (PcHMGR, PcFPPS, PcTPSCF2, PcTPSB15, and PcPTS, along with the expression of the control gene Pc18S) pathway genes related to the patchouli alcohol production pathway were studied. The Real Time-qPCR results show that there was no significant change in the expression of any of the five analyzed genes.Key message: Polyploidy induction leads to a range of changes in plant traits and often contributes to improved yield. It's essential to consider the specific traits while assessing the impact of polyploidization. [ABSTRACT FROM AUTHOR]

The topical application of essential oils is considered an effective treatment for skin diseases. Cymbopogon distans (Nees ex Steud.) Wats (Poaceae) is a promising aromatic grass widespread in the Himalayan temperate zone. Therefore, using in-vitro and in-vivo bioassays, we examined the chemical and pharmacological characteristics of essential oil hydro-distilled from C. distans coded as CDA-01, specifically concerning skin inflammation. Characterization using GC-FID and GC–MS provided a chemical fingerprint for CDA-01, enabling the identification of 54 compounds; amongst them, citral (34.3%), geranyl acetate (21.2%), and geraniol (16.4%) were the most abundant. To examine the anti-inflammatory potential, CDA-01 treatment on LPS-stimulated macrophage cells in addition to 12-O-tetradecanoylphorbol-13-acetate (TPA) generated cutaneous inflammatory reaction in the mouse ear was assessed through quantification of the inflammatory markers. Consequently, CDA-01 demonstrated protection against inflammation caused by LPS by lowering the pro-inflammatory cytokines (IL-6 and TNF-α) level in HaCaT cells with negligible cytotoxicity. Consistent with the in-vitro findings, CDA-01 treatment reduced pro-inflammatory mediators (TNF-, IL-6, and NO) and lipid peroxidation in an in-vivo investigation. Subcutaneous inflammation in TPA-treated mice ears was similarly decreased, as evidenced by the histological and morphological studies. As a result of our findings, it is possible that CDA-01 could be an effective treatment for skin inflammation disorders. [ABSTRACT FROM AUTHOR]

Cymbopogon martini variety sofia, commonly known as ginger-grass, is an important aromatic crop used by the perfumery, medicinal and cosmetic industries worldwide. This study explores the chemical and possible pharmacological profile of hydro-distilled essential oil of C. martini variety sofia against skin inflammation. The essential oil extracted by the hydrodistillation process was analyzed by gas chromatography (GC), gas chromatography–mass spectrometry (GC–MS) and nuclear magnetic resonance spectroscopy (NMR) to identify its constituents, and was coded as CMA-01 for further in vitro and in vivo pharmacological study related to skin inflammation. The chemical fingerprint revealed that CMA-01 oil has (E)-p-mentha-2,8-dien-1-ol (21.0%), (E)-p-mentha-1(7),8-dien-2-ol (18.1%), (Z)-p-mentha-1(7),8-dien-2-ol (17.4%), (Z)-p-mentha-2,8-dien-1-ol (9.0%), limonene (7.7%), and (E)-carveol (5.7%) as major components. The pre-treatment of CMA-01 showed significant inhibition of pro-inflammatory markers in activated HaCat cells without cytotoxic effect. The in vivo study revealed the ameliorative impact of CMA-01 against skin inflammation induced by TPA in mouse ears as evidenced by a reduction of ear edema, pro-inflammatory mediators (IL-6, TNF-α), oxidative stress markers (malondialdehyde and nitric-oxide) and histological changes in ear tissues without any skin irritation response on rabbit skin. These findings suggest the suitability of CMA-01 as a valuable therapeutic candidate for the treatment of skin inflammation. [ABSTRACT FROM AUTHOR]

Therefore, this study's purpose was to characterize the chemical composition and evaluate the antibacterial and antifungal activity of I P. microphylla i essential oil. Identification of the essential oil constituents was carried out based on retention index (RI) and comparison of mass spectra with the MS Library (NIST and Wiley) and with reference libraries [8]. The major components of the oil were ( I E i )-caryophyllene (48.1%), ( I E i )-nerolidol (16.7%), -pinene (6.6%), methyl salicylate (4.5%), -humulene (3.2%), -pinene (1.9%), caryophyllene oxide (1.9%), and germacrene D (1.4%). [Extracted from the article]