scholarly journals Azospirillum brasilense FAVORS MORPHOPHYSIOLOGICAL CHARACTERISTICS AND NUTRIENT ACCUMULATION IN MAIZE CULTIVATED UNDER TWO WATER REGIMES

2020 ◽  
Vol 19 ◽  
pp. 17
Author(s):  
DANIELE MARIA MARQUES ◽  
PAULO CÉSAR MAGALHÃES ◽  
IVANILDO EVÓDIO MARRIEL ◽  
CARLOS CÉSAR GOMES JUNIOR ◽  
ADRIANO BORTOLOTTI DA SILVA ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Plant Growth ◽  
Nutrient Uptake ◽  
Water Deficit ◽  
Azospirillum Brasilense ◽  
Plant Growth Promoting Rhizobacteria ◽  
Nutrient Analysis ◽  
Promising Tool ◽  
Water Conditions ◽  
Maize Plants

The use of plant growth-promoting rhizobacteria (PGPR) is an important and promising tool for sustainable agriculture. The objective of this study was to evaluate the morphophysiological responses and nutrient uptake of maize plants inoculated with A. brasilense under two water conditions. The experiment was carried out in a greenhouse with ten treatments: five A. brasilense inoculants (Control, Az1, Az2, Az3 and Az4) inoculated in the seed and two water conditions - irrigated and water deficit. Treatments with water deficit were imposed at the V6 stage for a period of 15 days. The phytotechnical characteristics, gas exchange, root morphology, shoot, root and total dry matter, as well as nutrient analysis, were evaluated after water deficit. Azospirillum brasilense (Az1, Az2, Az3 and Az4) yielded higher growth, increased gas exchange and nutrient uptake under irrigation conditions. Inoculation by Az1 and Az3 benefited the root architecture of maize plants, with a greater exploitation of the soil profile by these roots. Water deficit caused a reduction in the development of maize plants. Inoculation by Az1, Az2 and Az3 can improve plant growth, nutrient uptake and mitigate the effects of water deficit in the development of maize plants.

Azospirillum brasilense FAVORS MORPHOPHYSIOLOGICAL CHARACTERISTICS AND NUTRIENT ACCUMULATION IN MAIZE CULTIVATED UNDER TWO WATER REGIMES

2020 ◽  
Vol 19 ◽  
pp. 17
Author(s):  
DANIELE MARIA MARQUES ◽  
PAULO CÉSAR MAGALHÃES ◽  
IVANILDO EVÓDIO MARRIEL ◽  
CARLOS CÉSAR GOMES JUNIOR ◽  
ADRIANO BORTOLOTTI DA SILVA ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Plant Growth ◽  
Nutrient Uptake ◽  
Water Deficit ◽  
Azospirillum Brasilense ◽  
Plant Growth Promoting Rhizobacteria ◽  
Nutrient Analysis ◽  
Promising Tool ◽  
Water Conditions ◽  
Maize Plants

The use of plant growth-promoting rhizobacteria (PGPR) is an important and promising tool for sustainable agriculture. The objective of this study was to evaluate the morphophysiological responses and nutrient uptake of maize plants inoculated with A. brasilense under two water conditions. The experiment was carried out in a greenhouse with ten treatments: five A. brasilense inoculants (Control, Az1, Az2, Az3 and Az4) inoculated in the seed and two water conditions - irrigated and water deficit. Treatments with water deficit were imposed at the V6 stage for a period of 15 days. The phytotechnical characteristics, gas exchange, root morphology, shoot, root and total dry matter, as well as nutrient analysis, were evaluated after water deficit. Azospirillum brasilense (Az1, Az2, Az3 and Az4) yielded higher growth, increased gas exchange and nutrient uptake under irrigation conditions. Inoculation by Az1 and Az3 benefited the root architecture of maize plants, with a greater exploitation of the soil profile by these roots. Water deficit caused a reduction in the development of maize plants. Inoculation by Az1, Az2 and Az3 can improve plant growth, nutrient uptake and mitigate the effects of water deficit in the development of maize plants.

scholarly journals Effects of Durum Wheat (Triticum durum Desf.) Inoculation with PGPR (Azospirillum brasilense, Bacillus sp and Frankia CcI3) and Its Tolerance to Water Deficit

2020 ◽  
Author(s):  
M. Benmati ◽  
A. Mouellef ◽  
N. Belbekri ◽  
A. Djekoun
Keyword(s):  
Plant Growth ◽  
Durum Wheat ◽  
Water Deficit ◽  
Azospirillum Brasilense ◽  
Plant Growth Promoting Rhizobacteria ◽  
Bacillus Sp ◽  
Wheat Varieties ◽  
Plant Growth Promoting ◽  
Underlying Mechanisms ◽  
Eastern Algeria

Plant-growth-promoting rhizobacteria can improve plant growth, development and stress adaptation. However, the underlying mechanisms are still largely unclear. We investigated the effects of Azospirillum brasilense, Bacillus sp and Frankia CcI3 on durum wheat. Our study consisted in the evaluation of the interaction between rhizosphere microorganisms isolated from soils of different regions of Eastern Algeria and two varieties of durum wheat (GTA- dur and WAHA). Furthermore, our studies have also been carried out on the same durum wheat varieties under water deficit condition for the evaluation of the capacities of these PGPR in the restoration of their growth and in the increase of the production. The obtained results confirm the significant abilities of PGPR under these stress conditions for maintaining growth and plant survival.

scholarly journals Gas Exchange, Root Morphology and Nutrients in Maize Plants Inoculated with Azospirillum brasilense Cultivated Under Two Water Conditions

2021 ◽  
Vol 64 ◽  
Author(s):  
Daniele Maria Marques ◽  
Paulo César Magalhães ◽  
Ivanildo Evódio Marriel ◽  
Carlos César Gomes Júnior ◽  
Adriano Bortolotti da Silva ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Root Morphology ◽  
Azospirillum Brasilense ◽  
Water Conditions ◽  
Maize Plants

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 ROOT SYSTEM IN MAIZE PLANTS CULTIVATED UNDER WATER DEFICIT AND APPLICATION OF CHITOSAN

2020 ◽  
Vol 19 ◽  
pp. 11
Author(s):  
LORENA GABRIELA ALMEIDA ◽  
EDER MARCOS DA SILVA ◽  
PAULO CÉSAR MAGALHÃES ◽  
DÉCIO KARAM ◽  
CAROLINE OLIVEIRA DOS REIS ◽  
...  
Keyword(s):  
Plant Growth ◽  
Root System ◽  
Water Deficit ◽  
Water Availability ◽  
Agricultural Production ◽  
Negative Effects ◽  
Flowering Stage ◽  
Specific Behavior ◽  
Maize Plants ◽  
Corn Plants

Low water availability is characterized as an abiotic stressthat limits the agricultural production. Due to the physical and chemicalcharacteristics of the chitosan (CHT), this substance might stimulatephysiological responses on plants to tolerate the water deficit. In this sense,we submitted corn plants to water deficit and application of chitosan on theleaves (140 mg/L) during pre flowering stage. It were analyzed two cornhybrids genotypes contrasting for water deficit tolerance: DKB 390 (tolerant)and BRS1010 (sensitive). Then, we performed evaluations on the rootsystem and production components. Corn plants submitted to the applicationof chitosan presented a specific behavior: when compared the hybrids,the tolerant one presented a root system that was more developed and anexpressive agronomical yield. These results highlight the fact that the chitosanstimulates plant growth, enhancing their root system and contributing toincrease the availability and absorption of water and nutrients. The chitosanpresents a potential to reduce the negative effects of water deficit on the rootsystems, without compromising the agronomical yield.

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 Chitosan application in the induction of water deficit tolerance in maize plants

2019 ◽  
Vol 42 ◽  
pp. e42463
Author(s):  
Lorena Gabriela Almeida ◽  
Paulo César Magalhães ◽  
Décio Karam ◽  
Eder Marcos da Silva ◽  
Amauri Alves Alvarenga
Keyword(s):  
Hydrogen Peroxide ◽  
Lipid Peroxidation ◽  
Antioxidant Enzymes ◽  
Gas Exchange ◽  
Water Deficit ◽  
Foliar Application ◽  
Water Restriction ◽  
Biophysical Parameters ◽  
Relative Water ◽  
Maize Plants

The present research seeks to elucidate the feasibility of chitosan (CHT) in the induction of water deficit tolerance in different maize hybrids, contrasting tolerance to water restriction, tolerance and sensitivity. The maize plants were subjected to water deficit and foliar application of different chitosan doses (60, 100, 140, and 180 mg L-1) at the pre-flowering growth stage and evaluated during the stress period of fifteen days. To understand the induction behaviour of the tolerance to water restriction, biophysical parameters, such as water potential, relative water content and chlorophyll content, gas exchange, and biochemical assays, were quantified based on the activity of SOD, CAT, APX, and PAL antioxidant enzymes, lipid peroxidation activity and hydrogen peroxide content. Among the treatments, maize plants subjected to chitosan foliar application at a dose of 140 mg L-1 presented similar behavioural responses to plants under favourable irrigation conditions. Such positive responses are related to the high degree of activity of antioxidant enzymes, gas exchange and low levels of lipid peroxidation and hydrogen peroxide. The results support the potential use of CHT to increase tolerance to water stress.

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