[Phytochemical and morpho-physiological changes lavender (lavandula officinalis l.) in response to different culture media]

Background: Since the essential oil of lavender [Lavandula officinalis L.] was used for the treatment of diseases related to the nervous system and rheumatism, phytochemical evaluation of this plant is essential especially in terms of cultivation and production

Objective: This study was conducted to investigate the effect of different culture media on the amount of essential components, chlorophyll content, nutrients, growth characteristics, and rooting of lavender

Methods: The experiment was done the basis of randomized complete blocks design [RCBD] in 10 treatments and 3 replications. Substrates and culture media for plant production in this study were Ml; sand, M2; sandiperlite [2:1], M3; sand:peat-moss [2:1], M4; sand:vermicompost [2:1], M5; sand:perlite:peat-moss [2:1:1], M6; sand:perlite:vermicompost [2:1:1], M7; sand:peat-moss:vermicompost [2:1:1] M8; sand:vermicompost:peat-moss:perlite [2:1:1:2], M9; sand:vermicompost:peat-moss:perlite [4:1:1:2], and M10; sand:vermicompost:peat-moss:perlite [6:1:1:2]

Results: Results showed that culture media had significant effect on the all characteristics of rooting, chlorophyll and nutrient content and essential oil components in lavender plants. Limonene, borneol, and camphor were the highest amount of essential oil compounds in lavender, respectively

The highest content of limonene and oxygenated monoterpenes in Ml, rooting percentage and number of main root in M3, camphor and chlorophyll content and root dry weight in M5, borneol content in M8, and hydrocarbon monoterpenes in M10 were observed. Conclusion: The application of different culture media in the production and propagation of lavender in addition to changes in morpho-physiological characteristics of lavender can directly alter the properties of essential oil and phytochemical compounds

[Quantitative changes of trigonelline metabolite in fenugreek [trigonella foenum-gracum L.] sprouts under chitosan and water stress induction]

Background: Application of bio-stimulants is one of solutions to quantitative and qualitative changes in metabolites of medicinal plants sprouts

Objective: The aim of this study is to investigate the effect of chitosan bio-stimulation on trigonelline content of sprout under water stress

Methods: This study was conducted in three separate factorial experiments [three times of 4, 8 and 12 days after planting] based on completely randomized design with 15 treatment in 3 replications. The treatments were chitosan in five levels [0, 0.05%, 0.1%, 0.2% and 0.4%] and water stress in 3 levels [control without stress treatment, -0.2 and 0.4 Mpa]

Results: The result of variance analysis showed that chitosan, under stress and interaction effect of chitosan and water stress had significant effect on trigonelline content of 4, 8 and 12-day sprout. The trigonelline content decreased during the experiment in a way that the highest content of that was observed at the first days of seed germination

Conclusion: By induction of water stress and application of chitosan with optimum amount [to 0.2%] decrease in trigonelline content attained to the lowest trend during the experiment