scholarly journals The Coupling Effects of Plant Growth Promoting Rhizobacteria and Salicylic Acid on Physiological Modifications, Yield Traits, and Productivity of Wheat under Water Deficient Conditions

Agronomy ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 524 ◽  
Author(s):  
Emad Hafez ◽  
Alaa El Dein Omara ◽  
Alshaymaa Ahmed
Keyword(s):  
Salicylic Acid ◽  
Plant Growth ◽  
Nutrient Uptake ◽  
Water Deficit ◽  
Field Experiments ◽  
Plant Growth Promoting Rhizobacteria ◽  
Soil Microbial ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Soil Microbial Population

Water deficit and soil infertility negatively influence the growth, nutrient uptake, and productivity of wheat. Plant growth promoting rhizobacteria (PGPR) and salicylic acid (SA) were evaluated as possible solutions to mitigate the impacts of water deficit on growth, physiology, productivity, and nutrient uptake of wheat (Triticum aestivum L. cv. Sakha 95). Over two growing seasons (2016/2017 and 2017/2018) field experiments were conducted to examine eight combinations of two water treatments (water deficit and well-watered) with four soil and foliar treatments (control, PGPR, SA, and combination of PGPR + SA). The application of PGPR increased soil microbial activity resulting in increased field capacity and available soil water. Likewise, the application of the combined treatment of PGPR and SA significantly increased chlorophyll content, relative water content, stomatal conductance, soil microbial population, and showed inhibitory impacts on proline content, thus improving yield-related traits, productivity, and nutrient uptake (N, P, K) under water deficit compared to the control treatment. The results show that the integrative use of PGPR in association with SA may achieve an efficacious strategy to attenuate the harmful effects of water deficit as well as the amelioration of productivity and nutrient uptake of wheat under water-deficient conditions.

scholarly journals Mitigation of salinity in chickpea by Plant Growth Promoting Rhizobacteria and salicylic acid

2019 ◽  
Vol 8 (3) ◽  
pp. 221-228
Author(s):  
Aneela Riaz ◽  
Munazza Rafique ◽  
Muhammad Aftab ◽  
M. Amjad Qureshi ◽  
Hina Javed ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Interactive Effects of Plant Growth-Promoting Rhizobacteria and Phosphates Sources on Growth and Phosphorus Nutrition of Soybean under Moderate Drought

2019 ◽  
Vol 47 (3) ◽  
Author(s):  
Vladimir Ion ROTARU ◽  
Luxita RISNOVEANU
Keyword(s):  
Drought Stress ◽  
Plant Growth ◽  
Water Supply ◽  
Nutrient Uptake ◽  
Burkholderia Cepacia ◽  
Plant Growth Promoting Rhizobacteria ◽  
P Nutrition ◽  
Moderate Drought ◽  
Plant Growth Promoting ◽  
Growth Promoting

The growth of legume plants is usually improved by the rhizobacteria inoculation under low phosphorus (P) and alleviation of P nutrition plays important role in plant drought stress response. The aim of this study was to assess the comparative efficacy of two plant growth promoting rhizobacteria namely Burkholderia cepacia B36 and Enterobacter radicincitans D5/23T combined with two sources of phosphates in soybean (Glycine max L.) under low water supply. Plants were grown under P soluble versus insoluble P fertilization for comparing the effects of soybean inoculation on growth, uptake and use efficiency of phosphorus under moderate drought stress. At the beginning of flowering, half of plants was subjected to low water supply (35% water holding capacity, WHC) for 12 days while control plants were well watered - 70% WHC. The plants were harvested at the end of drought and physiological traits and P contents were analyzed. The inoculation treatments showed better plant growth and nutrient uptake when compared to uninoculated control. The application of the Burkholderia cepacia was more efficiently in terms plant growth than E. radicincitans especially under insoluble phosphates. Phosphorus concentrations of shoots and roots increased with both bacterial strains. The bacterial inoculation has much better stimulatory effect on nutrient uptake by soybean fertilized with insoluble phosphates. Study findings indicate that the combined application of PGPR (Burkholderia cepacia B36) and P amendments has the potential to improve P nutrition and growth of soybean cultivated on P-deficient soil under well-watered as well as moderate drought condition.   ********* In press - Online First. Article has been peer reviewed, accepted for publication and published online without pagination. It will receive pagination when the issue will be ready for publishing as a complete number (Volume 47, Issue 3, 2019). The article is searchable and citable by Digital Object Identifier (DOI). DOI link will become active after the article will be included in the complete issue. *********

scholarly journals The Effect of Plant Growth Promoting Rhizobacteria on the Water-yield Relationship and Carotenoid Production of Processing Tomatoes

HortScience ◽  
2018 ◽  
Vol 53 (6) ◽  
pp. 816-822 ◽  
Author(s):  
Tuan Anh Le ◽  
Zoltán Pék ◽  
Sándor Takács ◽  
András Neményi ◽  
Hussein G. Daood ◽  
...  
Keyword(s):  
Plant Growth ◽  
Water Supply ◽  
Field Experiments ◽  
Plant Growth Promoting Rhizobacteria ◽  
Water Yield ◽  
Total Biomass ◽  
Processing Tomato ◽  
Irrigation Regimes ◽  
Plant Growth Promoting ◽  
Growth Promoting

Open field experiments were conducted to investigate the effects of plant growth promoting rhizobacteria (PGPR) biofertilizer on processing tomato, grown under three different irrigation regimes. The field effectiveness of rhizobacteria inoculation on total biomass, yield, water use efficiency (WUE), carotenoid, and ascorbic acid production was examined in 2015 and 2016. The experimental design used was randomized block and the number of replications was four for each treatment. There were three different irrigation regimes: rain-fed control (RF), deficit water supply (WS50), and optimum water supply (WS100), which was delivered by drip irrigation in accordance with daily evapotranspiration (ETc). The test was performed on the Uno Rosso F1 processing tomato hybrid. Red fruit were measured at harvest in August and high-performance liquid chromatography (HPLC) was used for analysis. We evaluated yield quantity and total carotenoids and their composition (lycopene and β-carotene) depending on water supplement in 2 years. The marketable yield varied between 14.7 t·ha−1 and 126.9 t·ha−1 depending on treatment. The average soluble solids content (SSC) of the treatments ranged from 3.0 to 8.4. The total carotenoid yields of the treatments ranged from 0.8 to 40.4 kg·ha−1 and the average lycopene yield of the treatments ranged from 0.6 to 34.1 kg·ha−1. The effect of PGPR treatment was clearly positive for harvested yield, but this effect only prevailed under irrigated conditions.

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