فهرست مقالات Hollyhock

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  1 - Physical Properties of Microencapsulation of Echium amoenum.L and Altaea rosea var nigra Extract Prepared by Freeze Dryer Method
  Mahshid Zamankhani Sohrab  Moeini Peyman  Mahasti Shotorbani Hossein  MirsaeedGhazi Afshin Jafarpour
  Phenolic compounds are secondary metabolites in plants that also have health effects. Due to the effect of synthetic antioxidants on human health, there is a growing tendency to replace them with natural antioxidants. This research aims to investigate the beneficial pro چکیده کامل

  Phenolic compounds are secondary metabolites in plants that also have health effects. Due to the effect of synthetic antioxidants on human health, there is a growing tendency to replace them with natural antioxidants. This research aims to investigate the beneficial properties of borage extract (BE) and black hollyhock extract (BHE). First, the BE and BHE were encapsulated with whey protein and maltodextrin at 90:10, 50:50, 10:90 ratio by freeze drying method. Then, the analytical characteristics of BE and BHE were investigated. The amount of encapsulation of anthocyanin increased when the capsule had a higher whey protein content. In the encapsulation powder extract of BE and BHE with a whey protein ratio of 90 to 10 maltodextrin, the lowest amount of moisture and solubility was observed. When comparing the bulk density of the encapsulated extract of BE and BHE, no significant difference was observed, and the type of extract had no effect on the powder density. The combination of coating materials with a ratio of 10 maltodextrin to 90 whey protein has the highest encapsulation efficiency. Capsules with higher levels of whey protein were thicker walled capsules. Therefore, the optimal treatment was the capsule with a concentration of 90% whey protein and 10% maltodextrin. پرونده مقاله
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  2 - Alleviation of Drought Stress Effects by Exogenous Application of Spermidine and Salicylic Acid on Hollyhock (<i>Alcea rosea</i>)
  Toktam Oraee Mahmoud Shoor Ali Tehranifar Hossein Nemati
  Drought is one of the most important environmental factors limiting the cultivation of ornamental plants in the green space. The effects of spermidine and salicylic acid on hollyhock (Alcea rosea L.)under drought stress were investigated. At first, the plants were spray چکیده کامل

  Drought is one of the most important environmental factors limiting the cultivation of ornamental plants in the green space. The effects of spermidine and salicylic acid on hollyhock (Alcea rosea L.)under drought stress were investigated. At first, the plants were sprayed with 3 doses of spermidine and 3 doses of salicylic acid (control, 100, 200 and 400 &mu;M) for three consecutive days, then were subjected to drought stress (40, 60, 80 % FC) for 2 weeks. The results showed that drought stress increase up to 40 % FC increased electrolyte leakage, proline and superoxide dismutase enzyme activity compared to control plants. Also, the application of 100 &mu;M spermidine and salicylic acid in different concentrations of spraying solutions significantly reduced electrolyte leakage and catalase enzyme activity and increased the relative water content (RWC), proline, protein, number of flower, leaf area and superoxide dismutase enzyme activity, but higher concentrations (400 &mu;M) was ineffective or had inhibitive effects. Treated plants with 100 &mu;M spermidine and salicylic acid showed higher tolerance to drought stress (up to 40 % FC) with regard to lower electrolyte leakage (by 5 %) and higher relative water content (by 11 and 9 %), proline content (by 31 and 21 %), SPAD (by 18 and 5 %) and dry weight (by 3 %) compared with non-treated plants under 40 % FC. Hollyhock growth severely suffered by water deficit, but application of spermidine and salicylic acid promoted RWC, proline and protein content under water deficit conditions. Foliar application of spermidine and salicylic acid could be considered as an economical practice for increasing hollyhock performance under water deficit conditions. پرونده مقاله