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:: Volume 1, Number 2 (3-2016) ::
3 2016, 1(2): 16-26 Back to browse issues page
The study of interactive effects of UV-B Radiation and drought stress on some physiological traits of two cultivar of gourd (Cucurbita pepo L.)
Nobar Hagihosseinlo *, Siavasg Hosseini sargein, Rashid Jamei
master graduate Urmia University
Abstract:   (1731 Views)

The objective of the present investigation was to study the effect of drought stress, UV-B radiation and the combined effects of UV-B and drought stresses on two cultivars of gourd (mashhadi and hamadani) seedling. the gourd plants were grown with diurnal regime of 16h light and 8h dark and temperature of 22/260C (night/day). The relative humidity was 60% and average of photosynthetically active radiation was 150 µmol.m-2.S for 25 days. Then, 25-days-old seedlings were divided in to four groups: the control and three groups subjected to stress conditions: UV-B radiation and drought stress conditions, UV-B radiation and drought stresses combined. Results showed that shoot and root length, shoot and root dry and fresh weight, leaf total area, leaf RWC, chlorophyll a, b and carotenoid contents which were irradiated either with UV-B, drought stress or combined of two stresses have reduced significantly when compared with control. The physiological parameters indicate that with this experiment situation UV-B stress has stronger stress effectors than drought on the growth of seedling of both cultivars. The results suggested that co-stresses of supplementary UV-B radiation and drought synergistically functioned and one of them could alleviate the inhibitory effects of another under the condition of arid and semiarid loessial soils.

Keywords: Gourd, Ultraviolet Radiation, Drought stress, Photosynthetic pigments, RWC
     
Type of Study: Research | Subject: Special
Received: 2015/11/10 | Accepted: 2016/02/20 | Published: 2016/02/20
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Hagihosseinlo N, Hosseini sargein S, Jamei R. The study of interactive effects of UV-B Radiation and drought stress on some physiological traits of two cultivar of gourd (Cucurbita pepo L.). 3. 2016; 1 (2) :16-26
URL: http://journals.lu.ac.ir/ijppb/article-1-22-en.html
Volume 1, Number 2 (3-2016) Back to browse issues page
مجله فیزیولوژی و بیوشیمی گیاهی ایران Iranian Journal of Plant Physiology and Biochemistry
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