Saeed Bazgeer; Mahmoud Behrouzi; Hamid Nouri; Mohamad Ali Nejatian; Davod Akhzari
Abstract
To investigate the effects of dust particles on physiological and yield characteristics of grapevine cv. Bidaneh Safid, a field experiment in randomized complete block design (RCBD) was conducted on 40 plants at the Malayer Grape Research Station, Iran, during 2015-2017. The treatments comprised of: ...
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To investigate the effects of dust particles on physiological and yield characteristics of grapevine cv. Bidaneh Safid, a field experiment in randomized complete block design (RCBD) was conducted on 40 plants at the Malayer Grape Research Station, Iran, during 2015-2017. The treatments comprised of: 1) artificial dust (4.3 micron, on average), 2) washing vine by well water, 3) washing vine by soluble-in-water dioctyle solution (dioctyl sulfosuccinate under the brand name dioctyl) one day after spraying artificial dust, 4) washing vine after the occurrence of natural dust storm in the region with no artificial dust applied, and 5) control, dust was not applied and after dust storm vines were not washed. Analysis of variance revealed that dioctyl and dust treatment had the highest and lowest yields of 12 and 4.5 kg/vine, respectively. In addition, dust particles significantly decreased fruit set (by 21.7% as compare to dioctyl treatment), berries per bunch (57 berries per bunch as compared to dioctyl treatment (82 berries/bunch)) and weight of bunch (85 g as compared to dioctyl which was 110 g). Moreover, dust had adverse effects on lengths of shoot (decrease up to 62 cm), leaf dry weight (1.28 to 1.39 g as compared to dioctyl treatment which ranged between 1.45 and 1.55 g) and photosynthetic pigments. (e.g. chlorophyll a reduced by 1.26 mg g-1). In conclusion, washing grapevine with dioctyl and water removed dust from surface of the leaves and dust could not damage the growth and yield of the grapevine.
Nasser Abbaspour; Lavin Babaee
Abstract
Adaptation and defense responses are the consequences of exposure to drought stress in plants. Salicylic acid (SA) as a natural signaling molecule poses a significant impacts on various aspects of plant growth and development. This study investigates the effects of SA on carotenoids content, lipid peroxidation ...
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Adaptation and defense responses are the consequences of exposure to drought stress in plants. Salicylic acid (SA) as a natural signaling molecule poses a significant impacts on various aspects of plant growth and development. This study investigates the effects of SA on carotenoids content, lipid peroxidation rate and antioxidant enzymes activities. A pot experiment was conducted using a factorial pattern based on a randomized complete block design with three replications under greenhouse conditions. The variables in the experiment included grapevine cultivars (‘Rasheh’ and ‘Bidane Sefid’), irrigation periods (5, 10 and 15 day intervals) and SA concentrations (0, 1 and 2 mM). Results showed that with increasing the drought stress levels, increase in carotenoids, malondialdehyde (MDA) contents, catalase (CAT), ascorbate peroxidase (APX) and guaiacol peroxidase (GPX) enzymes activities were detected. Carotenoids content, catalase (CAT) and ascorbate peroxidase (APX) and guaiacol peroxidase (GPX) enzymes activities were higher in the Rasheh cultivar compared with the ‘Bidane Sefid’ cultivar. Carotenoids content, CAT, APX and GPX enzymes activities increased by application of salicylic acid. . According to the obtained results, the Rasha cultivar showed a greater tolerance to water stress in comparison with Bidane Sefid cultivar, suggesting that SA is capable of inducing drought stress tolerance in plants.