عنوان مجله
|
BIOCHEMICAL SYSTEMATICS AND ECOLOGY
|
کلیدواژهها
|
Artemisia dracunculus L, Essential oil, Salinity, Pigments, Lightning, Phenol, Methyl chavicol
|
چکیده
|
Soil salinity is one of the major limiting factors of medicinal plant performance and may affect their properties
and chemical constituents. Although various reports have suggested the light quality-mediated modulation of
growth and metabolism, little is known about physiological and phytochemicals aspects of light intensity on
medicinal plants. In the present study, a factorial experiment as a randomized complete block design with three
replicates was conducted to investigate the effects of salinity stress and light intensity on tarragon plants grown
in pots at outdoor conditions. The experimental treatments consisted of NaCl salt stress at three levels (0, 60, and
120 mM) and different light intensities (full light, 75% of sunlight, and 50% of sunlight). According to the results,
salinity led to a reduction in plant height, shoot dry weight, relative water content (RWC), and chlorophyll
content compared to control conditions. While low light intensity improved the above mentioned characteristics.
However, the interaction effect of salinity (60 mM) and low light intensity significantly increased anthocyanin
and chlorophyll contents, and dry weight. Overall, tarragon yield can be improved at 75% of light intensity and
moderate salinity by increasing the synthesis of photosynthetic pigments and phenolic compounds as protective
substances. Essential oils examined here were particularly rich in methyl chavicol (68.39–79.02%), camphene
(0.26–6.28%), β-pinene (0.24–5.21%), and trans-β-o-cymene (1.49–4.53%).
|