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Exploring the resilience of wheat crops grown in short rotations through minimising the build-up of an important soil-borne fungal pathogen.

ABSTRACT: Given the increasing demand for wheat which is forecast, cropping of wheat in short rotations will likely remain a common practice. However, in temperate wheat growing regions the soil-borne fungal pathogen Gaeumannomyces tritici becomes a major constraint on productivity. In cultivar rotation field experiments on the Rothamsted Farm (Hertfordshire, UK) we demonstrated a substantial reduction in take-all disease and grain yield increases of up to 2.4 tonnes/ha when a low take-all inoculum building wheat cultivar was grown in the first year of wheat cropping. Phenotyping of 71 modern elite wheat cultivars for the take-all inoculum build-up trait across six diverse trial sites identified a few cultivars which exhibited a consistent lowering of take-all inoculum build-up. However, there was also evidence of a significant interaction effect between trial site and cultivar when a pooled Residual Maximum Likelihood (REML) procedure was conducted. There was no evidence of an unusual rooting phenotype associated with take-all inoculum build-up in two independent field experiments and a sand column experiment. Together our results highlight the complex interactions between wheat genotype, environmental conditions and take-all inoculum build-up. Further work is required to determine the underlying genetic and mechanistic basis of this important phenomenon.

SUBMITTER: McMillan VE

PROVIDER: S-EPMC6015077 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature

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Exploring the resilience of wheat crops grown in short rotations through minimising the build-up of an important soil-borne fungal pathogen.

McMillan V E VE Canning G G Moughan J J White R P RP Gutteridge R J RJ Hammond-Kosack K E KE

Scientific reports 20180622 1

Given the increasing demand for wheat which is forecast, cropping of wheat in short rotations will likely remain a common practice. However, in temperate wheat growing regions the soil-borne fungal pathogen Gaeumannomyces tritici becomes a major constraint on productivity. In cultivar rotation field experiments on the Rothamsted Farm (Hertfordshire, UK) we demonstrated a substantial reduction in take-all disease and grain yield increases of up to 2.4 tonnes/ha when a low take-all inoculum buildi ...[more]

PMID: 29934522

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Project description:Soybean continuous cropping (SC) leads to continuous cropping obstacles, and soil-borne fungal diseases occur frequently. Rotation can alleviate continuous cropping obstacles. However, the long-term effects of continuous cropping and rotation on the structure and function of the fungal community in soil are not clear. In this study, five cropping systems, SC, fallow (CK), fallow-soybean (FS), corn-soybean (CS), and wheat-soybean (WS), were implemented in the long-term continuous cropping area of soybean. After 13 years of planting, high-throughput sequencing was used to evaluate the structure and diversity of soil fungal communities and to study the relationship between fungal communities and soil environmental factors. The results showed that the abundance and diversity of fungal flora in SC soil were the highest. There were significant differences in the formation of soil fungal communities between soybean continuous cropping and the other treatments. There were 355 species of endemic fungi in SC soil. There were 231 and 120 endemic species in WS and CS, respectively. The relative abundance of the potential pathogens Lectera, Gibberella, and Fusarium in the SC treatment soil was significantly high, and the abundance of all potential pathogens in CK was significantly the lowest. The abundance of Lectera and Fusarium in CS was significantly the lowest. There was a positive correlation between potential pathogens in the soil. The relative abundance of potential pathogens in the soil was significantly positively correlated with the relative abundance of Ascomycetes and negatively correlated with the relative abundance of Basidiomycetes. Potential pathogenic genera had a significant negative correlation with soil OM, available Mn, K and soil pH and a significant positive correlation with the contents of soil available Cu, Fe, and Zn. In general, the fungal communities of SC, FS, WS, and CS were divided into one group, which was significantly different from CK. WS and CS were more similar in fungal community structure. The CK and CS treatments reduced the relative abundance of soil fungi and potential pathogens. Our study shows that SC and FS lead to selective stress on fungi and pathogenic fungi and lead to the development of fungal community abundance and diversity, while CK and CS can reduce this development, which is conducive to plant health.

Project description:BackgroundResilience has been studied as an effective concept in nursing that acts as a protective factor which aids in overcoming difficult situations and related mental problems. With the recent increase in demand for nursing homes, nursing home nursing staff are facing a variety of stresses and psychological burdens. Improving resilience has been suggested as one way to deal with the difficulties, such as stress, exhaustion, and burnout, that nursing home nursing staff are experiencing. In order to provide successful education aimed at improving such resilience, it is very important to understand how to perceive experience from the learner's point of view.AimThe study's aim is to identify the ways that nursing home nursing staff build resilience.MethodThis study used phenomenography, a methodology for exploring the relationship between subject and phenomenon. From January 15, 2022 to February 20, 2022, data collection was undertaken at three nursing homes located in the Republic of Korea. The data was collected through semi-structured interviews with 20 nursing staff members in NHs and a data analysis that strictly followed the 7-step analysis process of phenomenography.ResultsEight categories were derived. The eight categories were then divided into two groups of four representing perception and strategy. Perception included four categories: 'grasping the situation', 'thinking about one's responsibility for the resident and personal values', 'considering one's strength' and 'thinking of an improved self'. Strategy included four categories: 'evaluation of oneself and one's environment', 'taking care of oneself', 'finding concrete ways to manage the problem' and 'self-development for growth'. Perception had three levels of awareness, valuing and assuring, while strategy had three levels of identifying, introspecting and concretizing.ConclusionThis study provides insight into how individual nursing staff build resilience, a complex and subjective concept. It provides a foundation for future resilience education of nursing home nursing staff and suggests future educational intervention development directions.

Dataset Information

Exploring the resilience of wheat crops grown in short rotations through minimising the build-up of an important soil-borne fungal pathogen.

Publications

Exploring the resilience of wheat crops grown in short rotations through minimising the build-up of an important soil-borne fungal pathogen.

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