List of Articles growth-promoting bacteria

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Evaluation of the effects of some biofertilizers on nutrient uptake and essential oil yield in the golden plant (Dracocephalum kotschyi Boiss) under different soil moisture regimes
  Ramin Cham Seyed Ali Abtahi Mojtaba Jafarinia Jafar yasrebi
  10.30495/wsrcj.2021.18543
  Dracocephalum kotschyi is one of the most important medicinal plants of the family Lamiaceae which is endangered due to unfavorable environmental conditions. Therefore, in order to investigate the effect of biofertilizers at four levels (nitroxin, super nitroplus, bioph More

  Dracocephalum kotschyi is one of the most important medicinal plants of the family Lamiaceae which is endangered due to unfavorable environmental conditions. Therefore, in order to investigate the effect of biofertilizers at four levels (nitroxin, super nitroplus, biophosphorus and non-use of biofertilizer) on essential oil yield and nutrient uptake of D. kotschyi seedlings under drought stress at three levels (irrigation to completion 80, 60 and 40% of field capacity) a completely randomized design in 3 replication (each replication includes 25 pots containing one seedling) was performed in the greenhouse as a pot experiment containing cocopeat and perlite culture medium in a ratio of 1: 1. The highest amount of root nitrogen uptake (2.2 mg kg-1) and leaf nitrogen (57.5 mg kg-1) was observed in conventional irrigation treatment (irrigation treatment up to 80% of field capacity) and application of super nitroplus biofertilizer. The percentage of essential oil under mild stress increased by 77.53% compared to the control, while with the intensification of drought stress, the percentage of essential oil decreased by 94.49% compared to the control. The results of this study showed that the most increasing effect on essential oil percentage (1.1%) and essential oil yield (1.5 g plant-1) of D. kotschyi was related to inoculation with Super Nitroplus biofertilizer and mild drought stress, while cultivation of D. kotschyi under normal irrigation conditions and no biofertilizer resulted in the lowest production and yield of essential oil. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - A review of the effects of drought stress on plants and some effective strategies in crop management
  Amin Fathi Abbas Maleki Rahim Naseri
  10.30495/iper.2022.1944163.1744
  The world is facing major challenges such as climate change, floods, population growth and a variety of environmental stress. All of this can directly or indirectly affect agriculture. Drought is one of the most important abiotic stresses and a limiting factor in the su More

  The world is facing major challenges such as climate change, floods, population growth and a variety of environmental stress. All of this can directly or indirectly affect agriculture. Drought is one of the most important abiotic stresses and a limiting factor in the successful production of plant products around the world and has adverse effects on the morphological and physiological activities of plants. Adaptation to the effects of drought stress is the result of changes in growth, physiological and biochemical mechanisms that cause changes in growth rate, stomatal conductance, photosynthetic process and enzymatic activities of plants. Drought stress disrupts photosynthesis in plants and gradually reduces carbon dioxide uptake due to closed pores. In addition, drought stress affects the stability of cell membranes and disrupts plant water relationships by reducing water use efficiency. Plants adopt different mechanisms to deal with these conditions. Proper management is very important to prevent the adverse effects of drought stress. Today, researchers are trying to reduce the effects of drought stress by spraying with hormones or hormone-like, growth-promoting bacteria, mycorrhizae, and resistant cultivars. In this paper, we investigate the effects of drought stress on some morphological, physiological and biochemical characteristics of plants. Also, some crop management methods have been proposed to overcome the destructive effects of drought stress. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  3 - Study of Biofertilizers Effect on Some Physiological and Biochemical Traits of Dracocephalum kotschyi Boiss. Under Different Soil Moisture Regimes
  Ramin Cham Seyed Ali Abtahi mojtaba jafarinia Jafar Yasrebi
  10.30495/ejmp.2021.694476
  Dracocephalum kotschyi is one of the most important medicinal plants of the Lamiaceae family, which is endangered due to unfavorable environmental conditions. Therefore, in order to evaluate the effectiveness of biofertilizers on changes in some physiological and bioche More

  Dracocephalum kotschyi is one of the most important medicinal plants of the Lamiaceae family, which is endangered due to unfavorable environmental conditions. Therefore, in order to evaluate the effectiveness of biofertilizers on changes in some physiological and biochemical traits, the effect of biofertilizers at four levels (nitroxin, super nitroplus, biophosphorus and non-use of biofertilizer) on Dracocephalum kotschyi growth under drought stress at three levels (irrigation until the completion of 80%, 60 and 40% of field capacity), an experiment in 1398 in the form of factorial in a completely randomized design with 3 replications in a greenhouse was carried out. The study of changes in photosynthetic pigments, chlorophyll fluorescence and leaf relative water content in Dracocephalum kotschyi in response to various biofertilizers and different irrigation regimes showed that with increasing drought stress, chlorophyll a, b and total chlorophyll along with chlorophyll fluorescence (Fv/Fm) had a significant decrease. While the use of supernitroplus and biophosphorus biofertilizers in irrigation conditions up to 60 and 40% of field capacity significantly increased the above-mentioned traits in the Dracocephalum kotschyi leaves in comparison with plants treated with nitroxin fertilizer and control plants (Without biofertilizer). Increased drought intensity also caused a significant increase in carbohydrates, soluble proteins, anthocyanins and flavonoids, although the use of biofertilizers containing growth-promoting bacteria, further enhanced the amount of these compounds compared to the control (no fertilizer treatment). The highest levels of anthocyanins (37.82 mg g-1 fresh weight) and flavonoid compounds (16.62 mg g-1 fresh weight) were found in plants grown under severe drought stress (irrigation up to 40% of field capacity) and Biophosphorus application. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  4 - Effects of hydro- and bio-priming on some physiological and biochemical characteristics of quinoa (Chenopodium quinoa) seedlings under drought stress
  Saba Dashab Heshmat Omidi
  10.30495/ijpp.2021.1919331.1282
  Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  5 - The Effect of different fertilization systems (chemical, biological and combinatory) on different characteristics of winter barley
  Nasrin Mirzakarami Mohammad Mirzaei-Heydari Mahmoud Rostaminia
  In order to evaluate the effect of the combined system of biological and chemical inputs on different characteristics of winter barley, the three-factor factorial experiment in a randomized complete block design with three replications was conducted at Sarableh Research More

  In order to evaluate the effect of the combined system of biological and chemical inputs on different characteristics of winter barley, the three-factor factorial experiment in a randomized complete block design with three replications was conducted at Sarableh Research Station of Ilam, during the 2014-2015 growing seasons. Treatments contain the application method of biofertilizer factor that include, Soil inoculation at the depth of 4 cm in the soil and Seeds inoculation, the second factor was phosphorus (P) fertilizer as triple super phosphate include three levels of P fertilizer (0, 50 and 100 kg P ha-1), the third factor involves the use of bio-fertilizers (1. Azotobacter 2. Pseudomonas 3. Azotobacter + Pseudomonas 4. Control (no inoculation)). Mean comparison of treatments showed highly significant differences between different levels of P fertilizer. The comparison of means showed that significant differences exist between different levels of bio-fertilizers and grain yield (4206 kg ha-1) of the third level (Azotobacter + Pseudomonas) achieved a 26% increase compared to the control. The results of this study showed that the use of biofertilizers potentially reducing dependence on chemical fertilizers and decreasing potential human, animal and environmental impact. Finally, according to the survey results, it seems that seed inoculation method with biological fertilizer is more effective than terrestrial insemination. Manuscript profile