Survival of Azospirillum brasilense flocculated cells in alginate and its inoculation effect on growth and yield of maize under water deficit conditions

Optimum water availability at different growth stages is one the major prerequisites of best growth and yield production of plants. Exogenous application of plant growth regulators considered effective for normal functioning of plants under water-deficit conditions. A study was conducted to examine the influence of exogenously applied L-methionine on sunflower (Helianthus annuus L.) plants grown under water-deficit conditions. Twenty-five-day old seedlings of four sunflower cultivars, FH331, FH572, FH652 and FH623 were exposed to control (100% F.C.) and drought stress (60% F.C.) conditions. After 30-day of drought stress, L-methionine (Met; 20 mg/L) was applied as a foliar spray to control and drought stressed plants. Water deficit stress significantly reduced shoot fresh and dry weights shoot and root lengths, and chlorophyll a content in all four cultivars. While a significant increase was observed due to water deficiency in relative membrane permeability (RMP), malondialdehyde (MDA), total soluble proteins (TSP), total soluble sugars (TSS), ascorbic acid (AsA) and activity of peroxidase (POD). Although, exogenously applied Met was effective in decreasing RMP, MDA and H2O2 contents, it increased the shoot fresh weight, shoot length, chlorophyll a, chlorophyll a/b ratio, proline contents and the activities of SOD, POD and CAT enzymes in all four cultivars under water deficit stress. No change in AsA and total phenolics was observed due to foliar-applied Met under water stress conditions. Of all sunflower cultivars, cv. FH-572 was the highest and cv. FH-652 the lowest of all four cultivars in shoot fresh and dry weights as well as shoot length under drought stress conditions. Overall, foliar applied L-methionine was effective in improving the drought stress tolerance of sunflower plants that was found to be positively associated with Met induced improved growth attributes and reduced RMP, MDA and H2O2 contents under water deficit conditions.

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Effect iron chelated and potassium fertilization on growth and yield of wheat Triticum aestivum L.

Muthanna Journal for Agricultural Sciences ◽

10.52113/mjas04/8.1/1 ◽

2020 ◽

Vol 8 (1) ◽

pp. 1-7

Author(s):

Mahdi S. Mizel ◽

Ragheb H. A. Albourky ◽

Hayder A. Almaghir

Keyword(s):

Growth Traits ◽

Flag Leaf ◽

Winter Season ◽

Triticum Aestivum L ◽

Included Study ◽

Growth And Yield ◽

Control Treatment ◽

Potassium Fertilizer ◽

Two Factors ◽

Effect On Growth

"A field experiment was carried in two locations (Nasr and Eslah) in Thi Qar province during winter season (2015 – 2016). the experience included study two factors which of three concentrations of iron chelated (0-50-100 mg L-1 ) spray on leaves before flowering period , and three levels of potassium fertilizer ( 0- 50-100 K2O kg h-1 ) The experiment was designed by using randomized complete blocks design with three replication (RCBD) with three replications. Results showed that the iron chelated treatments had a significant effect on growth traits in both of Nasr and Eslah locations , the treatment of concentration of 100 mg/ L get higher values for growth traits plant height 88-85 cm and the number of tillers / plant 12-10 Tillers, area flag leaf 25.6-25.5 cm2 and yield grain 6.04-5.97 t / h in Nasr and Eslah, respectively, while potassium treatment had a significant effect on growth traits in both of locations, the treatment 100 kg K2O h -1 gave higher values for growth traits area flag leaf reached 28-27.1 cm2 and gave the highest values of the attributes of yield the components and yield grain 6.00-5.9 t / h in Nasr site and Eslah, respectively . The combination treatment (100 mg Fe with 100 kg K2O) gave the highest mean properties of the yield components, number of spikes, number of grains per spike, and grain yield compared to the control treatment"

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Isolation and Characterization of Azospirillum Isolates from Soil and Their Effect on Growth and Yield of Wheat (Triticum aestivum L.) under Different Levels of Nitrogen Fertilizer

Assiut Journal of Agricultural Sciences ◽

10.21608/ajas.1999.16882 ◽

2018 ◽

Vol 49 (3) ◽

pp. 65-74

Author(s):

M. Mohamed ◽

H. Mohamed ◽

M. Gameh ◽

Hamdia El-Rewainy

Keyword(s):

Triticum Aestivum ◽

Nitrogen Fertilizer ◽

Triticum Aestivum L ◽

Growth And Yield ◽

Isolation And Characterization ◽

Different Levels ◽

Effect On Growth

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Co-inoculation with Azospirillum brasilense in soybean cultivars subjected to water déficit

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v24n2p89-94 ◽

2020 ◽

Vol 24 (2) ◽

pp. 89-94 ◽

Cited By ~ 1

Author(s):

Alessandra M. de L. Naoe ◽

Joênes M. Peluzio ◽

Leonardo J. M. Campos ◽

Lucas K. Naoe ◽

Roberta A. e Silva

Keyword(s):

Grain Yield ◽

Water Deficit ◽

Bradyrhizobium Japonicum ◽

Azospirillum Brasilense ◽

Field Experiments ◽

Crop Evapotranspiration ◽

Plant Genotype ◽

Soybean Cultivars ◽

Sowing Dates ◽

Soybean Plants

ABSTRACT This study aimed to verify the effect of co-inoculation, association between Azospirillum brasilense and Bradyrhizobium japonicum bacteria, on soybean plants subjected to water deficit at two sowing dates. Two field experiments were conducted at the Universidade Federal de Tocantins, campus of Palmas, Brazil, in 2016. The experimental design was randomized blocks in a split-split-plot arrangement with four repetitions, where the plots consisted of two irrigation depths (100 and 25% of crop evapotranspiration - ETc), the subplots was composed of two methods of inoculant application (inoculation with Bradyrhizobium japonicum and co-inoculation with Azospirillum brasilense + Bradyrhizobium japonicum) and the sub-subplots comprised two soybean cultivars (TMG 132 and ANTA 82). The cultivars responded differently to the sowing dates. Co-inoculation did not influence grain yield under full irrigation conditions (100% ETc), in neither cultivar evaluated. However, under the water deficit condition (25% ETc), the grain yield of the cultivar TMG 132 increased 77.20%, indicating that there are different responses of interaction between Azospirillum brasilense, plant genotype and sowing dates.

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