List of Articles Plant hormones

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  1 - تاثیر سایتوکینین و تنش شوری بر ویژگی‌های گلدهی و بیوشیمیایی یاسمن زمستانه
  معصومه فاضلی داوود نادری
   هدف از این مطالعه بررسی اثرات سطوح مختلف تنش شوری و محلول­پاشی 6-بنزیل آمینوپورین (بنزیل آدنین) بر ویژگی‌های مورفولوژیک و بیوشیمیایی یاسمن زمستانه بود. بنابراین آزمایشی در سال‌های 96-1395 در مرکز تحقیقات گلخانه‌ای دانشگاه آزاد اسلامی واحد اصفهان (خوراسگان) انج More

   هدف از این مطالعه بررسی اثرات سطوح مختلف تنش شوری و محلول­پاشی 6-بنزیل آمینوپورین (بنزیل آدنین) بر ویژگی‌های مورفولوژیک و بیوشیمیایی یاسمن زمستانه بود. بنابراین آزمایشی در سال‌های 96-1395 در مرکز تحقیقات گلخانه‌ای دانشگاه آزاد اسلامی واحد اصفهان (خوراسگان) انجام شد. این آزمایش بصورت فاکتوریل بر اساس طرح کاملا تصادفی با چهار سطح تنش شوری (2، 4، 6 و 8 دسی‌زیمنس بر متر) به‌عنوان عامل اول و سطوح مختلف بنزیل‌آدنین (کنترل (عدم کاربرد)، 25 و 50 میلی‌گرم در لیتر) به عنوان عامل دوم در 3 تکرار (مجموع 36 واحد آزمایش) انجام شد. صفاتی مانند وزن تر و خشک وزن گل، تعداد گل، درصد کلروفیل a، b، کل، کاروتنوئید و آنزیم سوپراکسید دیسموتاز گیاه یاسمن زمستانه مورد مطالعه قرار گرفت. نتایج نشان داد که سطوح شوری و بنزیل‌آدنین تاثیر معنی‌داری بر تمام صفات داشت. نتایج نشان داد که فعالیت آنزیم سوپر اکسید دیسموتاز در شوری هشت دسی‌زیمنس بر متر به‌طور معنی‌داری از فعالیت این آنزیم در تیمار دو دسی‌زیمنس بر متر بیشتر بود و بالاترین فعالیت آن در تیمار هشت دسی‌زیمنس بر متر مشاهده شد. از سوی دیگر، در بررسی اثرات استفاده از بنزیل‌آدنین، مشاهده شد که این تیمار اثرات مثبتی بر تمام صفات مورد بررسی دارد و اثرات آن­ها وابسته به غلظت است. در پایان می‌توان گفت، با وجودی که تنش شوری اثر منفی بر یاسمن زمستانه داشت، تیمار بنزیل‌آدنین اثرات منفی تنش شوری را کاهش داده است. Manuscript profile
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  2 - Interaction between hormonal treatments and type of explant on callus formation and photosynthetic pigments in chicory (Cichorium intybus L.)
  Mahin Ghaemi zahra zare Fariba Aghili
  10.30495/jdb.2022.689261
  Chicory (Cichorium intybus L) is an important medicinal plant with valuable secondary metabolites. Chicory callus is a good source for the production and extraction of metabolites of this plant. In this study, chicory callus changes were investigated about some morpholo More

  Chicory (Cichorium intybus L) is an important medicinal plant with valuable secondary metabolites. Chicory callus is a good source for the production and extraction of metabolites of this plant. In this study, chicory callus changes were investigated about some morphological and biochemical characteristics to obtain the best hormonal treatment. Healthy seedlings were prepared from sterile chicory seeds in ½ MS culture medium. Stem, leaf, and root explants were prepared from seedlings and used for culture in liquid MS and 2,4-D, BAP, and kinetin hormones at concentrations of 0.5, 0.75, and 1 mg / l were cultured. The results showed that callus was yellow and green to dark brown and callus texture also showed from weak and soft to firm. The highest percentage of callus (76.22%) related to leaf explant and treatment 2,4-D (0.5mg / L), the highest amount of fresh weight of callus (7.30 g), and dry weight of callus (0.077 g) In leaf explant and Kin treatment (0.75 mg / L), the highest amount of chlorophyll a, b and total was related to leaf and BAP hormone treatment (0.75 mg / L). The highest amount of carotenoids was related to root explant and Kin (1 mg / L). In general, the interactions of hormones and explants affect different callus-forming characteristics and these effects depend on the type of explants and the concentration of growth regulators, and the greatest effect was observed in leaf explant culture. Manuscript profile
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  3 - Effect of salicylic acid application times on biochemical, agronomic and yield characteristics of barley (Hordeum vulgare L.) in different humidity regimes
  mojtaba shoaa Farhad Mohajeri Mohammad Rahim Owji Alireza Bagheri
  In order to investigate the effects of external application time of salicylic acid hormone on morphological and physiological properties of barley (Nosrat cultivar) under stress conditions in Neyriz city during two cropping years 2019-2020 and 2020-2021 a split plot exp More

  In order to investigate the effects of external application time of salicylic acid hormone on morphological and physiological properties of barley (Nosrat cultivar) under stress conditions in Neyriz city during two cropping years 2019-2020 and 2020-2021 a split plot experiment based on randomized complete block design with the main factor of different irrigation conditions (without irrigation, two irrigation and four times of irrigation) and the sub factor of salicylic acid foliar application times (without foliar application, tillering end 50% emergence of stem and end of flag leaf emergence) was conducted. The results showed That without irrigation treatment reduced leaf chlorophyll index and chlorophyll a and b by 74.2%, 66.02 and 42.31%, respectively. without irrigation Treatment also significantly reduced grain yield. It was 86.9% (average of two years of experiment). Foliar application at the end of tillering increased grain yield by 10.36% on average. Increased grain yield due foliar application at the end of tillering in without treatment irrigation was 6.2% and in four times irrigation treatments was 10.1%, which indicates the positive effect foliar application in higher humidity conditions. Foliar application increased the concentration of proline compared to the control without foliar application. The highest proline concentration was foliar application at the end of tillering. Proline concentration increased with decreasing irrigation frequency. The results indicate application of salicylic acid at the end of tillering by improving biochemical properties is effective in reducing the effects of drought stress and its use in barley is recommended in similar water and soil conditions. Manuscript profile
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  4 - The Effect of Growth Regulators on Some Photosynthetic Traits and Maintenance of Cell Membrane Structure of Flag Leaf of Two Wheat Cultivars under Rainfed Conditions
  Ali  Rasaei Saeid Jalali-Honarmand Mohsen Saeidi Mohammad-Eghbal Ghobadi
  When the plant is exposed to abiotic stresses, the cell membrane is the first part of the cell to be affected by stress, and the relationships of the many of physiological and biochemical cell of the plant are disrupted. The effect of three growth hormones (3 indoleacet More

  When the plant is exposed to abiotic stresses, the cell membrane is the first part of the cell to be affected by stress, and the relationships of the many of physiological and biochemical cell of the plant are disrupted. The effect of three growth hormones (3 indoleacetic acid [IAA], gibberellic acid [GA3] and 6 benzylaminopurine [6 BAP]) with a control (distilled water) was evaluated at booting stage of two wheat cultivars (Rijaw and Azar 2). A factorial experiment using a randomized complete block design (RCBD) with three replications was setup at Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran in 2013-14 and 2014-15. Based on the results, the effect of different growth hormones on SPAD, relative water content, Fv/Fm, performance index, leaf cell membrane stability and photosynthetic rate of both cultivars were significant. Among growth hormones, foliar application of Cytokinin and Auxin had the greatest effect on the measured leaf traits and the lowest mean of the traits was obtained in non-spraying treatment (control). Between the two cultivars, Rijaw cultivar was superior to Azar-2. There was also a positive and significant correlation between cell membrane stability and photosynthesis rate, Fv/Fm and performance index. In general, in dryland conditions (water deficiency) with external application of cytokinin in booting stage in superior wheat cultivar (Rijaw) cell membrane stability, relative water content, photosynthetic rate and Fv/Fm were 16, 18, 38 and 45 percent higher than the control, respectively. Manuscript profile