عنوان مقاله [English]
Medicinal, functional, and nutraceutical herbs have been used as food and for medicinal purposes for centuries. Lallemantia species can be used for a variety of purposes including lightening, varnish, painting, food, and medicine. The genus is also distributed in Afghanistan, Pakistan, India, China, Syria, Iraq, Turkmenistan, Tajikistan, Kyrgyzstan, Kazakhstan, Uzbekistan, Russia, and some other European countries. Lallemantia iberica is a member of Labiatae family. This family is one of the largest and most distinctive flowering plants, with about 220 genera and almost 4000 species worldwide. It is well represented in different regions of European and Middle East countries, especially Iran, by 46 genera and 410 species and subspecies. Dragon’s head seed is a good source of polysaccharides, fibre, oil and protein and has some medicinal, nutritional and human health properties. This seed absorbs water quickly when soaked because of a high mucilage content and produces a sticky, turbid and tasteless liquid, which can be used as a novel food hydrocolloid in food formulations. The increasing consumption and high economic value of dragon’s head medicinal plant make research on planting factors of this plant necessary. The aim of this study was some traits such as grain yield, oil yield, percentage and mucilage yield of five dragon’s head accessions medicinal plants.
Materials and Methods
This experiment was carried out in the research farm of Lorestan Agricultural and Natural Resources Research and Training Center in the 2018 crop year. The research farm had a longitude of 48 degrees and 35 minutes north and a latitude of 33 degrees and 48 minutes east, elevation above sea level was 1147.8 meters, average rainfall was 525 mm and average temperature was 14.13 ° C. According to the climatic classification, Khorramabad region has a subtropical climate with hot and dry summers and based on long-term statistics, it has a temperate climate. The experiment was performed on a randomized complete block design with three replications. Experimental treatment including five dragons’s head accessions (Takab, Kaleibar, Kurdistan, Nazarkahrizi and Jolfa). Trains including grain yield, biochemical traits and photosynthetic pigments. The data were analyzed by SAS 9.1 statistical program and the means were compared by Duncan's multiple range test at the level of 5% probability.
Results and Discussion
The results of analysis of variance showed that grain yield, oil yield, mucilage yield, 1000-grain weight, biological yield and harvest index were affected by mass. According to the results of comparison, the mean of maximum grain yield, oil yield, biological yield and mucilage yield were obtained in Kalibar mass and was ranked next in Takab mass. The lowest grain and oil yield was obtained in Julfa mass. Based on the results of this experiment, in the dryland conditions of Khorramabad region, Kalibar massif was superior to other massifs in terms of the studied traits. Based on correlation analysis in rainfed conditions, grain yield had the highest correlation coefficient with oil yield, mucilage yield and biological yield. The results of Pearson correlation between the studied traits with grain yield showed that between grain yield and oil yield, mucilage yield, biological yield and Harvest index had a significant correlation. Grain yield was also significant with oil content, mucilage percentage, 1000-grain weight, chlorophyll a, chlorophyll b, total chlorophyll and carotenoids. The highest positive and significant correlation was observed between chlorophyll b content and total chlorophyll content.
According to the results, the effect of mass had a significant effect on the evaluated traits. The highest grain mucilage yield, grain oil, biological yield and also grain yield were observed in Kaleibar mass and then in Takab mass. It was in Kaleibar massif that there was a significant difference with other dragon’s head accessions. The lowest grain yield, mucilage yield, grain oil yield and biological yield were also obtained in Julfa massif. According to the experimental findings, in dryland conditions of Khorramabad region, Kaleibar mass are suitable for cultivation first and then Takab mass and have acceptable yield and can be recommended for cultivation in similar conditions.
We would like to thank the officials of the Faculty of Agricultural Sciences, Medicinal Plants Research Center, Plant Physiology Laboratory of Basic Sciences and Crop Physiology Laboratory of Shahed University for providing the facilities for this research.