Potential of growth-promoting bacteria in maize (Zea mays L.) varies according to soil moisture

被引:9
作者
Araujo, Victor Lucas Vieira Prudencio [1 ]
Fracetto, Giselle Gomes Monteiro [2 ]
Silva, Antonio Marcos Miranda [1 ]
Pereira, Arthur Prudencio de Araujo [3 ]
Freitas, Caio Cesar Gomes [1 ]
Barros, Felipe Martins do Rego [1 ]
Santana, Maiele Cintra [1 ]
Feiler, Henrique Petry [4 ]
Matteoli, Filipe Pereira [1 ]
Fracetto, Felipe Jose Cury [2 ]
Cardoso, Elke Jurandy Bran Nogueira [1 ]
机构
[1] Univ Sao Paulo, Dept Ciencia Solo, Escola Super Agr Luiz de Queiroz, BR-13400970 Piracicaba, SP, Brazil
[2] Univ Fed Rural Pernambuco, Dept Agron, BR-52171900 Recife, PE, Brazil
[3] Univ Fed Ceara, Ctr Ciencias Agr, Dept Ciencias Solo, BR-60355636 Fortaleza, Ceara, Brazil
[4] Purdue Univ, Dept Agron, W Lafayette, IN 47906 USA
基金
巴西圣保罗研究基金会;
关键词
Water deficit; Bacterial inoculation; Microbial inoculants; Maize cultivation; Biotechnological; PLANT-GROWTH; AZOSPIRILLUM-BRASILENSE; DROUGHT; ARTHROBACTER; STRESS; ENHANCEMENT; DEGRADATION; MICROBIOME; RESISTANCE; CAATINGA;
D O I
10.1016/j.micres.2023.127352
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Climate change has caused irregularities in water distribution, which affect the soil drying-wetting cycle and the development of economically important agricultural crops. Therefore, the use of plant growth-promoting bac-teria (PGPB) emerges as an efficient strategy to mitigate negative impacts on crop yield. We hypothesized that the use of PGPB (in consortium or not) had potential to promote maize (Zea mays L.) growth under a soil moisture gradient in both non-sterile and sterile soils. Thirty PGPB strains were characterized for direct plant growth-promotion and drought tolerance induction mechanisms and were used in two independent experiments. Four soil water contents were used to simulate a severe drought (30% of field capacity [FC]), moderate drought (50% of FC), no drought (80% of FC) and, finally, a water gradient comprising the three mentioned soil water contents (80%, 50%, and 30% of FC). Two bacteria strains (BS28-7 Arthrobacter sp. and BS43 Streptomyces alboflavus), in addition to three consortia (BC2, BC4 and BCV) stood out in maize growth performance in experiment 1 and were used in experiment 2. Overall, under moderate drought, inoculation with BS43 surpassed the control treatment in root dry mass and nutrient uptake. Considering the water gradient treatment (80-50-30% of FC), the greatest total biomass was found in the uninoculated treatment when compared to BS28-7, BC2, and BCV. The greatest development of Z. mays L. was only observed under constant water stress conditions in the presence of PGPB. This is the first report that demonstrated the negative effect of individual inoculation of Arthrobacter sp. and the consortium of this strain with Streptomyces alboflavus on the growth of Z. mays L. based on a soil moisture gradient; however, future studies are needed for further validation.
引用
收藏
页数:11
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