Study of phytohormones effects on UV-B stress seeds of thyme species
Journal Title: Journal of Herbal Drugs - Year 2017, Vol 8, Issue 2
Abstract
Background & Aim: Thymus vulgaris L. and Thymus daenensis Celak (Thyme), members of the family Lamiaceae, are widely used in Iranian folk medicine. The aim of this research was to study how salicylic acid (SA), gibberellin (GA), and indole acetic acid (IAA)-seed priming affect UV-B radiation in seeds of Thyme (T. vulgaris, T. daenensis Celak) under both laboratory and outdoor conditions. Experimental: The effects of phytohormones (200, 400, 600 ppm) and irradiation performed in a 60 Co Gamma cell 220 source at a dose of 3 kGy (10, 20 and 30 min) on seeds of Thyme species were studied. Seeds were tested under in vitro and outdoor conditions in a complete randomized factorial layout with 4 and 3 replications, respectively. The characters measured under in vitro condition were seed germination percentage, mean time of germination, root and stem length. On the field, the characters evaluated were number of leaf, length of plant, root and shoot dry matter and essential oil. Results: SA treatment was better under in vitro conditions. No significant effects were obtained from GA and IAA. The most destructive effects and the best beneficial phytohormones were UV 30 min and SA (200 and 400 ppm), respectively. The effects of foliar application of hormones were determined on growth and essential oil production in medicinal plants in two consecutive years. Shoot dry matter increased in both years with SA applications but IAA and GA had no beneficial effects on germination characters after UV radiation. Recommended applications/industries: SA-priming of seeds protects thyme seedlings against UV-B radiation. The results of this study also showed that elevation of free SA levels in plants, either by exogenous feeding or genetically may enhance their tolerance to abiotic stress.
Authors and Affiliations
Mehrab Yadegari
Keywords
Related Articles
- EP ID EP23547
- DOI -
- Views 368
- Downloads 22
Variation in yield and yield components in cultivated accessions of Satureja macrantha in Yazd
Background & Aim: The genus Satureja belonging to the family of lamiaceae and consists of over 235 different species throughout the world. Fourteen species grow naturally in IRAN of which eleven species are endemic. Diff...
Quantitative and qualitative changes of essential oil of Artemisia haussckenechtii in different phenological stages
Background & Aim: Artemisia species with common Persian name of Dermaneh are found all over Iran and are used for treatment in infectious diseases such as malaria, hepatitis and other diseases. Some Artemisia species are...
Effect of Boswellia serrata Triana & Planch. gum resin administration during lactation on morphology of pyramidal neurons in hippocampus of rat
Background & Aim: In traditional medicine, Boswellia species gum resin known as Frankincense or Olibanum, has been administrated in elderly for enhancement of memory and also in pregnant women to increase memory and inte...
Investigation of main constituents of Satureja hortensis L. essential oil under sowing date and plant density in Mazandaran province
Background and aim: The genus Satureja L. (Lamiaceae) includes 12 species of annual and perennial herbaceous plant in Iran. Satureja species have economic and medicinal importance because of their high essential oil cont...
Pharmacological potential of plants used in dental care: A Review
Background & Aim: The major teeth problems associated with adults are: Plaque, Tartar, Tooth decay, Gingivitis, Periodontal disease. There is a long and venerable history of the use of plants to improve dental health a...