Prospecting Plant Growth-Promoting Bacteria Isolated from the Rhizosphere of Sugarcane Under Drought Stress

Pereira, Letícia Bianca; Andrade, Gabriela S.; Meneghin, Silvana P.; Vicentini, Renato; Ottoboni, Laura Maria Mariscal

doi:10.1007/s00284-019-01749-x

Cited by 33 publications

(23 citation statements)

References 50 publications

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“…IAA is an auxin that promotes plant growth. Microbially produced IAA is a beneficial phytostimulator involved in the plant-microbe interaction (Glickmann and Dessaux 1995;Pereira et al 2019). We confirmed that strain Sm4-1986 is able to produce IAA, which may contribute to the promotion of plant growth.…”

Section: Discussionsupporting

confidence: 69%

A Streptomyces morookaensis strain promotes plant growth and suppresses Fusarium wilt of banana

Zhu

Zhi-hong

2020

Trop. plant pathol.

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Fusarium wilt of banana, caused by Fusarium oxysporum f. sp. cubense (Foc), tropical race 4 (TR4), is one of the most devastating diseases, thus control of this disease is an urgent need in banana production. Streptomyces morookaensis strain Sm4-1986 significantly inhibited mycelial growth and spore germination of pathogen Foc-TR4. Chrome Azurol S assay showed that the strain Sm4-1986 is able to produce siderophores, and spectrometric scan confirmed that the siderophores produced belong to carboxylate-type. Addition of FeCl 3 eliminated the antagonism between the strain Sm4-1986 and Foc-TR4. Inoculation of banana plantlets with strain Sm4-1986 promotes plant growth, which may be mainly due to the production of indole-3-acetic acid (IAA). Application of strain Sm4-1986 to banana plantlets significantly reduced disease severity index and disease incidence of Fusarium wilt. These findings suggest that the Streptomyces morookaensis strain Sm4-1986 could be explored for uses such as biocontrol agents or biofertilizers in banana plantation.

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Section: Discussionsupporting

confidence: 69%

A Streptomyces morookaensis strain promotes plant growth and suppresses Fusarium wilt of banana

Zhu

Zhi-hong

2020

Trop. plant pathol.

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“…The authors stated that the structure of the rhizospheric bacterial community was modulated mainly by soil total organic C, total N, Na + , and total P while total organic carbon, electronic conductivity, pH, and total phosphorus were the dominant factors to affect the microbial communities associated to the different dunes. Pereira [191] confirms that the low density of bacteria in the desert, compared to a soil not subjected to water stress, can be due to the previous reported physical-chemical characteristics of the arid soil.…”

Section: Influence Of Salinity and Aridity On Microbial Communities And On Plant Microbial Interactionssupporting

confidence: 76%

Saline and Arid Soils: Impact on Bacteria, Plants, and Their Interaction

Gamalero

Bona

Todeschini

et al. 2020

Biology

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Salinity and drought are the most important abiotic stresses hampering crop growth and yield. It has been estimated that arid areas cover between 41% and 45% of the total Earth area worldwide. At the same time, the world’s population is going to soon reach 9 billion and the survival of this huge amount of people is dependent on agricultural products. Plants growing in saline/arid soil shows low germination rate, short roots, reduced shoot biomass, and serious impairment of photosynthetic efficiency, thus leading to a substantial loss of crop productivity, resulting in significant economic damage. However, plants should not be considered as single entities, but as a superorganism, or a holobiont, resulting from the intimate interactions occurring between the plant and the associated microbiota. Consequently, it is very complex to define how the plant responds to stress on the basis of the interaction with its associated plant growth-promoting bacteria (PGPB). This review provides an overview of the physiological mechanisms involved in plant survival in arid and saline soils and aims at describing the interactions occurring between plants and its bacteriome in such perturbed environments. The potential of PGPB in supporting plant survival and fitness in these environmental conditions has been discussed.

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“…That is, we observed an increase in the relative microbial abundance in the TG rhizoplane and a reduction in abundance in the rhizosphere, suggesting that some bacteria migrate from the rhizosphere to the rhizoplane ( Figure 3A). It has been reported that several plant growth-promoting bacteria colonize in the rhizosphere of sugarcane under drought stress (Pereira et al, 2019). Besides, previous studies have suggested that the phylum Proteobacteria comprises several plant growthpromoting rhizobacteria (PGPR) (Bruto et al, 2014), which may facilitate plant growth by promoting the acquisition of nutritional resources such as N, P, and iron (Vurukonda et al, 2016).…”

Section: Similar Bacterial Composition Of the Rhizoplane And Rhizosphmentioning

confidence: 99%

Effects of Drought-Tolerant Ea-DREB2B Transgenic Sugarcane on Bacterial Communities in Soil

et al. 2020

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Drought is a major abiotic stress affecting plant growth and development. Sugarcane, a sugar crop planted in warmer climate, suffers dramatically from drought stress. Bacterial communities colonizing the rhizosphere, where roots sense drought stress initially, have been well studied for their beneficial effects on plant growth and health. The Ea-DREB2B gene cloned from the sugarcane, Saccharum arundinaceum, belongs to the DREB2 subgroup of the DREB gene family, which is involved in drought response regulation. Here, we present a detailed characterization of the rhizoplane, rhizosphere, and bulk soil bacterial communities determined using a high-sequencing approach with the transgenic (TG) sugarcane variety GN18 harboring the drought-tolerant Ea-DREB2B gene and its isogenic wild-type (WT) variety FN95-1702 under the same environmental conditions. In addition, the total carbon (TC), total nitrogen (TN), and total phosphorus (TP) contents in each soil area were compared to explore the relationship between bacterial alteration in the TG and WT plants and environmental factors (TC, TN, TP, C:N, C:P, and N:P). Our results showed that the bacterial communities in the rhizosphere and rhizoplane of TG sugarcane were more similar and perfectly correlated with the environmental factors than those of the WT. This suggested that the bacterial communities of the TG plants were altered in response to the changes in root exudates. The results of our study suggest that the change in soil environment caused by transgenic sugarcane alters soil bacterial communities.

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Prospecting Plant Growth-Promoting Bacteria Isolated from the Rhizosphere of Sugarcane Under Drought Stress

Cited by 33 publications

References 50 publications

A Streptomyces morookaensis strain promotes plant growth and suppresses Fusarium wilt of banana

A Streptomyces morookaensis strain promotes plant growth and suppresses Fusarium wilt of banana

Saline and Arid Soils: Impact on Bacteria, Plants, and Their Interaction

Effects of Drought-Tolerant Ea-DREB2B Transgenic Sugarcane on Bacterial Communities in Soil

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