عنوان
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Influence of drought stress and
mycorrhizal (Funneliformis
mosseae) symbiosis on growth
parameters, chlorophyll
fluorescence, antioxidant
activity, and essential oil
composition of summer savory
(Satureja hortensis L.) plants
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عنوان مجله
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Frontiers in Plant Science
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کلیدواژهها
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summer savory (Satureja hortensis L.), drought stress, arbuscular mycorrhiza fungi
(AMF), growth parameters, chlorophyll fluorescence, antioxidant activity, essential oil
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چکیده
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Introduction: Drought stress unfavorably influences the growth and
physiological traits of plants in the arid and semi-arid regions of the world. This
study aimed to determine the effects of arbuscular mycorrhiza fungi (AMF;
Funneliformis mosseae) inoculation on the physiological and biochemical
responses of summer savory (Satureja hortensis L.) under different
irrigation regimes.
Methods: The first factor was different irrigation regimes, including no drought
stress (100% field capacity; FC), moderate drought stress (60% FC), and severe
drought stress (30% FC); the second factor included the plants without AMF
(AMF0) and with AMF inoculation (AMF1).
Results: The results showed that better values, higher plant height, shoot mass
(fresh and dry weight), relative water content (RWC), membrane stability index
(MSI), photosynthesis pigments, Fv, Fm, Fv/Fm, and total soluble proteins were
obtained in the plants inoculated with AMF. The highest values were obtained for
plants with no drought stress, then the plants subjected to AMF1 under 60% FC,
and the lowest ones for plants under 30% FC without AMF inoculation. Thus,
these properties are reduced under moderate and severe drought stress. At the
same time, the utmost activity of superoxide dismutase (SOD), ascorbate
peroxidase (APX), guaiacol peroxidase (GPX), and the highest malondialdehyde
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