Characterization of pectin-xylan-glucan-arabinogalactan proteins complex from Siberian fir Abies sibirica Ledeb.

Experiments were conducted to determine the effects of a Siberian fir (Abies sibirica) extract rich in triterpenic acid (TTA), a seaweed (Ascophyllum nodosum) extract with cytokinin-like activity (CSE), and a mixture of amino acids and short-chain peptides from fermented animal tissue (APC) on broadleaf cilantro (Eryngiumfoetidum) shoot weight and leaf area. Aqueous solutions of CSE, TTA, and APC at various rates were applied individually on the broadleaf cilantro leaves 15 and 30 days after transplanting. Broadleaf cilantro leaf area and shoot fresh and dry weights were determined after harvest (60 days after transplanting). APC, TTA, and CSE significantly increased broadleaf cilantro shoot weights and leaf area as compared to control plants. Aqueous solutions of APC at the rate of 900 g·L-1, CSE at the rate of 50 mg·L-1, and TTA at the rate of 300 mg·L-1 resulted in the highest broadleaf cilantro shoot weights.

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AGE-SPECIFIC DYNAMICS OF ESSENTIAL OIL CONTENT IN ABIES SIBIRICA BARK. THEORETICAL ASPECTS OF EVALUATION

chemistry of plant raw material ◽

10.14258/jcprm.2021049648 ◽

2021 ◽

pp. 175-182

Author(s):

Sergey Viktorovich Ushanov ◽

Valentina Mikhaylovna Ushanova

Keyword(s):

Experimental Data ◽

Essential Oil ◽

Oil Content ◽

Age Groups ◽

Compartment Model ◽

Parametric Identification ◽

Simulation Method ◽

Forest Steppe ◽

Siberian Fir ◽

Abies Sibirica

The variability of the essential oil content in Abies Sibirica bark in the Eastern and Western parts of the Krasnoyarsk forest-steppe was evaluated in eight age groups. The model of the age dynamics of changes in the essential oil content in the bark of Abies Sibirica, which is adequate to the experimental data, was obtained. With increasing age of fir, the content of fir oil in the bark increases from 1.4±0.1% of a. s. s. in 20–30 years of age to 2.8±0.2% of a.s.s. at the age of 70–80 years, with further decreases to 0.4±0.1% of a. s. s. in overmature trees. The results of parametric identification of the model for Abies Sibirica growing in the Krasnoyarsk forest-steppe are presented. Based on the results of 50.000 computational experiments, the simulation method estimates the statistics of changes in the model coefficients and 95% of the boundary of the forecast values of the content of fir oil in the bark. A compartment model is proposed that explains the age-specific dynamics of essential oil content in tree greens and Siberian fir bark. The obtained solution compartment model allows us to associate its parameters with the coefficients of models of changes in the content of fir oil in tree greens and bark obtained by processing experimental data.

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