Mana Mombeini; Naser Alamzadeh Ansari; Vahid Abdossi; abdali Naseri
Abstract
Seed priming is one of the most important measures in propagation of plants by seed, which leads to increase of percentage and rate of germination. This study was conducted as a factorial arrangement in a completely randomised design on two farm cucumber cultivars (‘Impress’ and ‘Emperor’). ...
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Seed priming is one of the most important measures in propagation of plants by seed, which leads to increase of percentage and rate of germination. This study was conducted as a factorial arrangement in a completely randomised design on two farm cucumber cultivars (‘Impress’ and ‘Emperor’). Priming treatments were silicic acid (SA) and ascorbic acid (AsA) at three levels of 50, 100 and 150 mg L-1, pyridoxine at three levels of 0.02%, 0.04% and 0.06% and compound treatment (SA 75 mg L-1 + AsA 75 mg L-1 + pyridoxine 0.03%). There was a positive and significant correlation between the Catalase (CAT) enzyme activity in the radicle and plumule and Polyphenol oxidase (PPO) in the radicle and germination rate and percentage. In the ‘Impress’ cultivar, the highest CAT activity in the radical and plumule was observed after using of 150 mg L-1 AsA. The highest activity of Polyphenol oxidase (PPO) in the radical was detected after using of 0.04% pyridoxine. In the ‘Emperor’ cultivar, the highest CAT enzyme activity was detected in the radical and plumule, respectively by using of 75 mg L-1 AsA, 75 mg L-1 SA, and 0.03% pyridoxine. AsA (50 mg L-1) induced the highest activity of PPO enzyme in the radicle. Finally, to increase the antioxidant enzyme activity in cucumbers against unfavourable environmental conditions, our results confirmed the effectiveness of 150 mg L-1 AsA and 0.04% pyridoxine for the ‘Impress’ cultivar and the compound treatment and 50 mg L-1 AsA for the ‘Emparator’ cultivar.
Mohammad Akbari; Noorali Sajedi; Masoud Gomarian; Mohsen Akbari
Abstract
In order to determine aqueous extract effects of cool-season turfgrass mixture clipping on germination and seedling growth of four weed species, laboratory and outdoor pot experiments were done at the experimental laboratory and greenhouse of the Doroud Parks and Landscape Organization, located in Doroud, ...
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In order to determine aqueous extract effects of cool-season turfgrass mixture clipping on germination and seedling growth of four weed species, laboratory and outdoor pot experiments were done at the experimental laboratory and greenhouse of the Doroud Parks and Landscape Organization, located in Doroud, Lorestan, Iran. The first factor was the concentration of sport turfgrass clipping extract (5, 10, 15, 20, 25% and 10, 25, 50, 75% (w/v) at laboratory and outdoor pot experiments, respectively) and the second factor was the type of weeds [dandelion (Taraxacum officinale), plantain (Plantago major), prostrate pigweed (Amaranthus blitoides) and common bermudagrass (Cynodon dactylon)]. A. blitoides was the most sensitive in both experiments. In both of the experiments, roots were more susceptible than shoots. For identifying phenolic acids, gas chromatography mass analysis displayed that this extract contained trans-cinnamic acid, 3,4,5-trimethoxybenzoic acid, syringic acid, p-coumaric acid, caffeic acid, gentisic acid, protocatechuic acid and ferulic acid. The results demonstrated that sport turfgrass clipping extracts have an inhibitory property on germination and initial seedling growth of noxious weed species and could be potentially used as preemergence bioherbicide.
