Planting in the ‘inter-row’ to overcome replant disease in apple orchards: a study on the effectiveness of the practice based on microbial indicators

Kelderer, Markus; Manici, L.; Caputo, F.; Thalheimer, M.

doi:10.1007/s11104-012-1172-0

Cited by 94 publications

(69 citation statements)

References 42 publications

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“…Many previous findings have demonstrated that upon attack by a fungal root pathogen, plants can alter their specific rhizosphere microbial populations for protection (Mendes et al 2011;Trivedi et al 2012;Donn et al 2014;Li et al 2014a). Thus, our results suggest that the reduction of cotton growth in monocropped soils may arise from the significant decline in soil suppressiveness to soil-borne pathogens in response to the use of soil for monocropping (Kyselková et al 2009;Kelderer et al 2012).…”

Section: Discussionmentioning

confidence: 83%

“…In most cases, soil sickness represents an outbreak of soilborne diseases involving soil fungi (Kelderer et al 2012;Li et al 2014c). However, the disease status of plants is a result of complex interactions between the plant, the soil environment, and microorganisms in the rhizosphere, including pathogenic and non-pathogenic microorganisms (Mendes et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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Declined soil suppressiveness to Fusarium oxysporum by rhizosphere microflora of cotton in soil sickness

Zhang

Ding

et al. 2015

Biol Fertil Soils

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Cotton yield and quality have been severely compromised by soil sickness throughout the primary cottongrowing regions of China. The aim of this study was to gain insight into the role of rhizosphere microbial community in governing soil sickness of cotton. Plant growth, disease resistance, root exudates, and the composition of the rhizosphere microbial community of cotton were analyzed in two different (4-and 15-year) monocropped soils and in a fallow agricultural soil (control). The monocropped soils significantly influenced cotton growth and root exudates and reduced soil suppressiveness to Fusarium wilt in bioassay experiments. Additionally, pyrosequencing of the whole internal transcribed spacers (ITS1 and ITS2) and 16S rRNA gene amplicons demonstrated clear variations in the microbial composition of cotton rhizosphere between monocropped rhizosphere soils and control soil. Specifically, monocropped soils were characterized by an increase in the abundance of fungal pathogens, including Fusarium oxysporum f. sp. vasinfectum and Verticillium dahliae, relative to the rhizosphere of control soil. Some plant-beneficial and disease-suppressive bacterial taxa, including Xanthomonadaceae, Comamonadaceae, Oxalobacteraceae, and Opitutaceae, were associated with healthy cotton. A significant correlation existed between the presence of certain amino acids (e.g., glutamic acid and alanine) and the above identified taxa, indicating that some constituents in root exudates influenced the microbial compositions of the cotton rhizosphere to manage the disease status of plant in monocropped soils. Collectively, these results suggest that pathogenic fungal build-up and a reduction in the abundance of beneficial rhizobacteria in the rhizosphere contribute to changes in soil suppressiveness to soil-borne pathogens in monocropped soils, resulting in an aggravated level of soil sickness.

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Section: Discussionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Declined soil suppressiveness to Fusarium oxysporum by rhizosphere microflora of cotton in soil sickness

Zhang

Ding

et al. 2015

Biol Fertil Soils

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“…In order to compare barley and triticale as host plants for Pythium, a greenhouse trial was performed using soil samples taken from a third-generation apple orchard in North Adige Valley (Italy) that was previously affected by replant disease corresponding to a 38% growth in comparison with a fallow control recorded in a previous survey (Kelderer et al 2012). As Pythium spp.…”

Section: Methodsmentioning

confidence: 99%

“…(1 of streptomycin sulfate, and identified on the basis of macroscopic and microscopic morphological characteristics using the relevant taxonomic keys as described in Manici et al (2013) and Kelderer et al (2012). Diversity indices of fungal endophytes in barley and triticale were evaluated on pooled species/abundance transformed to ln (x'1) and multiplied by 10.…”

Section: Methodsmentioning

confidence: 99%

“…The highest colonization (45%) was recorded in successive plantings of apple rootstocks, followed by barley, then alfalfa and finally marigold, which gave the lowest colonization frequency (Table 3). Fungal communities of apple rootstock, barley and alfalfa showed similar diversity (Table 4, cover crops), while marigold, which was scarcely colonized, showed the lowest diversity among cover crops ( (Mazzola 1997;Manici et al 2003Manici et al , 2013Kelderer et al 2012); . Others (total abundance 3%).…”

Section: Relationship Of Root Endophytic Fungi and Rhizospheric Bactementioning

confidence: 95%

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Impact of cover crop in pre-plant of apple orchards: relationship between crop health, root inhabiting fungi and rhizospheric bacteria

et al. 2015

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. 2015. Impact of cover crop in pre-plant of apple orchards: relationship between crop health, root inhabiting fungi and rhizospheric bacteria. Can. J. Plant Sci. 95: 947Á958. Replant disease of fruit tree orchards has a multifactorial etiology, mainly due to the decline in soil biodiversity along with an increase in root rot pathogens, which can be principally countered with appropriate cropping practices. Therefore, a study on the impact of cover crops on plant health of young fruit trees in long-term orchards was performed. Bioassays were performed over two consecutive growing cycles using soil from a multigeneration apple orchard affected by replant disease. First, a cycle was performed with three cover crops (alfalfa, barley, marigold) and apple rootstock plantlets; at the end, the above-ground part of the plant was removed and root residues left in the soil. In the second cycle, an apple orchard planting was simulated upon the first experimental design. Changes of diversity and composition of root inhabiting fungi and rhizospheric bacteria were evaluated as well as apple plant growth response to the pre-plant treatments. Results suggest that one cycle with alternate plants was sufficient to induce changes at the rhizosphere level, despite soil microbial resilience caused by the same long-term soil management. Rhizospheric bacteria were generally affected by plant genotype. Findings suggest that all three different cover crops can harbor almost all fungal species that colonize apple in replanted orchards (Fusarium spp., Pythum spp., binucleate Rhizoctonia sp., Cylindrocarponlike-fungi and a several nonpathogenic saprophytic fungi named ''other''), but their infection frequency varied according to the host plant. A single pre-plant break treatment did not overall differ significantly in plant growth of subsequent apple tree; however, break with marigold, which increased abundance of nonpathogenic root inhabiting fungi more than other cover crops, gave significantly higher plant growth than obtained after barley. This study provides evidence about covercrop potential to increase soil diversity in long-term permanent cropping systems and to manipulate root colonizing fungi involved in crop health.Key words: Alfalfa, barley, marigold, root rot fungal complex, Pythium spp., replant disease, Cylindrocarpon-like fungi, Rhizoctonia sp., permanent cropping systems Manici, L. M., Kelderer, M., Caputo, F., Nicoletti, F., De Luca Picione, F. et Topp A. R. 2015. Impact d'une culture abri sur les vergers de pommiers avant la plantation: liens entre la sante´des arbres, les champignons peuplant les racines et les bacte´ries de la rhizosphe`re. Can. J. Plant Sci. 95: 947Á958. La maladie de la replantation des arbres fruitiers se caracte´rise par une e´tiologie multifactorielle re´sultant principalement d'une baisse de la biodiversite´du sol et d'une hausse de la population des agents pathoge`nes responsables du pourridie´, hausse que l'on peut dans une large mesure combattre en adoptant les mesures agricoles ade´quates. Da...

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Bacterial communities as indicators of soil health under a continuous cropping system

et al. 2021

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With growing global interest in the improvement of soil quality and the adoption of sustainable land management systems, there is an urgent need to find early indicators to monitor and manage sustainable soil health. Meta‐analyses provide useful information on microbial communities and community‐level molecular characteristics, which can be exploited as ‘biomarker’ indicators of ecosystem processes for soil health evaluation. Lanzhou lily (Lilium davidii var. unicolor) is the only type of sweet edible lily in China, as well as an endemic species with a narrow distribution. Due to its uses as food and in gardening, this lily has an economic value in the Country, particularly in Gansu Province located in the Loess Plateau. This lily is usually cultivated in long‐term continuous monoculture (replanting), resulting in the so‐called consecutive replanting problem (CRP), which is associated with severe soil degradation and significant yield and quality losses. This study was conducted to investigate the bacterial community structure and specific bacterial members related to the lily's CRPs and soil health degradation indicators via next‐generation sequence (NGS) analysis. The bacterial diversity of rhizosphere soil was analyzed by high‐throughput DNA sequencing (Miseq) of samples collected in fields at 0, 3, 6, and 9 replanting years (L0, L3, L6, and L9, respectively). Results showed that long‐term replanting significantly increased soil bacterial abundance and insignificantly changed soil bacterial diversity. However, replanting altered the soil microbial communities where 3–6 years of replanting was a transmission period for change, resulting in a new community structure after 9 years of replanting. Some specific bacterial members were found to be correlated with lily's plant growth, both positively and negatively. Long‐term replanting accumulation of the harbored highly abundant pathogenic bacterial genus Streptomyces and the species Bacillus simplex and depletion of the plant‐beneficial bacteria genera Sphingomonas and Hyphomicrobium are the causes of the lily's CRP under a 0–9 year replanting system. In addition, changes in the soil physiochemical properties contributed to the new structure of bacterial communities, and the phylum Proteobacteria and the genus Sphingomonas could be regarded as potential indicators of sustainable soil management.

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Planting in the ‘inter-row’ to overcome replant disease in apple orchards: a study on the effectiveness of the practice based on microbial indicators

Cited by 94 publications

References 42 publications

Declined soil suppressiveness to Fusarium oxysporum by rhizosphere microflora of cotton in soil sickness

Declined soil suppressiveness to Fusarium oxysporum by rhizosphere microflora of cotton in soil sickness

Impact of cover crop in pre-plant of apple orchards: relationship between crop health, root inhabiting fungi and rhizospheric bacteria

Bacterial communities as indicators of soil health under a continuous cropping system

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