Alterations in the Endophyte-Enriched Root-Associated Microbiome of Rice Receiving Growth-Promoting Treatments of Urea Fertilizer and Rhizobium Biofertilizer

Jha, Pallavi; Gomaa, A. M.; Yanni, Y. G.; El-Saadany, Abd-Elgawad Y; Stedtfeld, Tiffany M.; Stedtfeld, Robert D.; Gantner, Stephan; Chai, Benli; Cole, James R.; Hashsham, Syed A.; Dazzo, Frank B.

doi:10.1007/s00248-019-01406-7

Cited by 33 publications

(17 citation statements)

References 70 publications

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“…According to Gaston [45], alpha diversity is the diversity in population at the local level. Researchers have already showed that alpha diversity of the endophytic microbes can be affected by soil physicochemical properties [18,19,46]. In the current study, we found intensive management had a significantly higher (p < 0.05) observed species and Chao1 (except 5a) indices compared with Con, which may be related to the soil attributes in the growing area ( Table 1).…”

Section: Discussionsupporting

confidence: 59%

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Changes of Root Endophytic Bacterial Community Along a Chronosequence of Intensively Managed Lei Bamboo (Phyllostachys praecox) Forests in Subtropical China

et al. 2019

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Endophytic bacteria widely exist inside plant tissues and have an important role in plant growth and development and the alleviation of environmental stress. However, little is known about the response of root-associated bacterial endophytes of Lei bamboo (Phyllostachys praecox) to intensive management, which is a common management practice for high bamboo shoot production in subtropical China. In this study, we comparatively investigated the root endophytic bacterial community structures in a chronosequence of intensively managed (5a, 10a, 15a, and 20a) and extensively managed plantations (as control, Con). The results showed that endophytic Proteobacteria was the dominant bacterial phylum in the bamboo roots. Intensive management significantly increased (p < 0.05) the bacterial observed species and Chao1 (except 5a) indices associated with bamboo roots. The relative abundances of Firmicutes, Bacteroidetes, and Actinobacteria (except 15a) in the intensively managed bamboo roots significantly increased (p < 0.05) compared with those in Con, while the relative abundance of Proteobacteria significantly decreased in intensively managed bamboo roots (p < 0.05). The phyla Proteobacteria, Actinobacteria, Bacteroidetes, and Firmicutes were the biomarkers in Con, 5a, 15a, and 20a, respectively. Redundancy analysis (RDA) showed that soil alkali-hydrolysable N (AN), available phosphorus (AP), available K (AK), and total organic carbon (TOC) were significantly correlated (p < 0.05) with the bacterial community compositions. Our results suggest that the root endophytic microbiome of Lei bamboo was markedly influenced by intensive management practices, and the available nutrient status could be the main driving factor for such shifts. Although heavy fertilization in the intensive management system increased the diversity indices, the rapid changes in root endophyte communities and their relevant functions might indicate a high risk for sustainable management.

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Section: Discussionsupporting

confidence: 59%

“…Recent studies have evaluated the effect of management regimes on bacterial endophytes in plant species, such as rice [19], wheat [17], maize [61], and grass [62]. The results of the current study also indicated that intensive management markedly influenced the Lei bamboo root endophyte microbiome.…”

Section: Discussionmentioning

confidence: 53%

Changes of Root Endophytic Bacterial Community Along a Chronosequence of Intensively Managed Lei Bamboo (Phyllostachys praecox) Forests in Subtropical China

et al. 2019

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“…The ecological impact generated when a field is inoculated with a PPB-based consortium must be addressed before the inoculation. For example, the addition of either N fertilizers or Rhizobium-based fertilizers significantly reduced the OTU richness and relative abundances in rice roots [131]. In this work, the rice-endophytic community presented genera Rheinheimera, unclassified Rhodospirillaceae, Pseudomonas, Asticcacaulis, Sphingomonas, and Rhizobium as dominant taxa.…”

Section: Ecological Constraints That Might Affect Inoculant Functionimentioning

confidence: 51%

Is the Application of Plant Probiotic Bacterial Consortia Always Beneficial for Plants? Exploring Synergies between Rhizobial and Non-Rhizobial Bacteria and Their Effects on Agro-Economically Valuable Crops

Menéndez

Paço

2020

Life

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The overgrowth of human population and the demand for high-quality foods necessitate the search for sustainable alternatives to increase crop production. The use of biofertilizers, mostly based on plant probiotic bacteria (PPB), represents a reliable and eco-friendly solution. This heterogeneous group of bacteria possesses many features with positive effects on plants; however, how these bacteria with each other and with the environment when released into a field has still barely been studied. In this review, we focused on the diversity of root endophytic rhizobial and non-rhizobial bacteria existing within plant root tissues, and also on their potential applications as consortia exerting benefits for plants and the environment. We demonstrated the benefits of using bacterial inoculant consortia instead of single-strain inoculants. We then critically discussed several considerations that farmers, companies, governments, and the scientific community should take into account when a biofertilizer based on those PPBs is proposed, including (i) a proper taxonomic identification, (ii) the characterization of the beneficial features of PPB strains, and (iii) the ecological impacts on plants, environment, and plant/soil microbiomes. Overall, the success of a PPB consortium depends on many factors that must be considered and analyzed before its application as a biofertilizer in an agricultural system.

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“…Las especies de Rhizobium, además de fijar nitrógeno atmosférico, incrementan el crecimiento, rendimiento y número de nódulos por raíz y movilizan fósforo (Saharan y Nehra, 2011). Las investigaciones recientes en este género bacteriano como promotor del crecimiento vegetal se enfocan en analizar su efecto sobre i) la estructura de las comunidades microbianas asociadas a la raíz (Jha et al, 2020); ii) desarrollar biofertlizantes para múltiples cultivos de leguminosas (Passricha et al, 2020); iii) introducir células de Rhizobium dentro de semillas mediante tecnología de vació para evitar pérdidas del inóculo (Lekatompessy et al, 2020); y iv) evaluar el efecto de la co-inoculación de Rhizobium y esporas de endomicorrizas (Kiuk et al, 2019).…”

Section: La Microbiología Y Su Relación Con La Agricultura: El Caso Dunclassified

Consideraciones sobre el uso de biofertilizantes como alternativa agro- biotecnológica sostenible para la seguridad alimentaria en México

Chávez-Díaz

Molina

Cruz-Cárdenas

et al. 2020

Remexca

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Desde el Posclásico, sin saberlo, los agricultores mexicas aprovechaban la gran diversidad microbiana presente en el lecho de los lagos que utilizaban como sustrato en sus esquemas de producción agrícola. A través de los años, la agricultura mexicana evolucionó de forma exitosa a la intensificación del campo y logró incrementar significativamente la productividad agrícola. Sin embargo, la utilización incrementada de fertilizantes sintéticos como solución a los problemas de fertilidad del suelo condujo a elevados costos económicos, ambientales y sociales. El presente ensayo muestra una reflexión crítica sobre la situación actual en el uso de los biofertilizantes en el campo mexicano y consideraciones futuras para garantizar su uso exitoso, y así contribuir a la seguridad alimentaria nacional de forma sostenible.

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Alterations in the Endophyte-Enriched Root-Associated Microbiome of Rice Receiving Growth-Promoting Treatments of Urea Fertilizer and Rhizobium Biofertilizer

Cited by 33 publications

References 70 publications

Changes of Root Endophytic Bacterial Community Along a Chronosequence of Intensively Managed Lei Bamboo (Phyllostachys praecox) Forests in Subtropical China

Changes of Root Endophytic Bacterial Community Along a Chronosequence of Intensively Managed Lei Bamboo (Phyllostachys praecox) Forests in Subtropical China

Is the Application of Plant Probiotic Bacterial Consortia Always Beneficial for Plants? Exploring Synergies between Rhizobial and Non-Rhizobial Bacteria and Their Effects on Agro-Economically Valuable Crops

Consideraciones sobre el uso de biofertilizantes como alternativa agro- biotecnológica sostenible para la seguridad alimentaria en México

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