Preferential wheat (Triticum aestivum. L cv. Fielder) root growth in different sized aggregates

Mawodza, Tinashe; Menon, Manoj; Brooks, Harriet; Burca, Genoveva; Casson, Stuart A.

doi:10.1016/j.still.2021.105054

Cited by 12 publications

(3 citation statements)

References 60 publications

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“…Neutron imaging has been used to investigate the soil water distribution previously [ 44 , 47 , 91 ] and the results from this study showed a similar water pattern in wheat roots in soil. This water pattern differed greatly compared to the water pattern in sand, which clearly indicated an impact on root growth from the growth media.…”

Section: Discussionmentioning

confidence: 54%

New Insights into the Bio-Chemical Changes in Wheat Induced by Cd and Drought: What Can We Learn on Cd Stress Using Neutron Imaging?

Lan,

Burca,

Yong

et al. 2024

Plants

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Cadmium (Cd) and drought stresses are becoming dominant in a changing climate. This study explored the impact of Cd and Cd + drought stress on durum wheat grown in soil and sand at two Cd levels. The physiological parameters were studied using classical methods, while the root architecture was explored using non-invasive neutron computed tomography (NCT) for the first time. Under Cd + drought, all the gas exchange parameters were significantly affected, especially at 120 mg/kg Cd + drought. Elevated Cd was found in the sand-grown roots. We innovatively show the Cd stress impact on the wheat root volume and architecture, and the water distribution in the “root-growing media” was successfully visualized using NCT. Diverse and varying root architectures were observed for soil and sand under the Cd stress compared to the non-stress conditions, as revealed using NCT. The intrinsic structure of the growing medium was responsible for a variation in the water distribution pattern. This study demonstrated a pilot approach to use NCT for quantitative and in situ mapping of Cd stress on wheat roots and visualized the water dynamics in the rhizosphere. The physiological and NCT data provide valuable information to relate further to genetic information for the identification of Cd-resilient wheat varieties in the changing climate.

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Section: Discussionmentioning

confidence: 54%

New Insights into the Bio-Chemical Changes in Wheat Induced by Cd and Drought: What Can We Learn on Cd Stress Using Neutron Imaging?

Lan,

Burca,

Yong

et al. 2024

Plants

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“…Furthermore, there are microenvironments associated with soil aggregates: the nutritional conditions found on the surfaces of the aggregates or the water films between the aggregates are distinct from the conditions present within the aggregates. Soil aggregates also affect root penetration: larger roots are more common in larger aggregates, whereas they are smaller in small aggregates (Mawodza et al., 2021).…”

Section: Soil Self‐organization Pedodiversity and Functionalitymentioning

confidence: 99%

Soil health, soil genetic horizons and biodiversity^#

Costantini¹,

Mocali

2022

J. Plant Nutr. Soil Sci.

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Maintaining or recovering soil health is becoming a goal of many policies carried out at national, continental and global scales to promote global health. This viewpoint is aimed at stressing the relevance of a holistic approach to soil health assessment and monitoring, which is not only related to soil functional biodiversity but also considers the genetic horizons of the soil profile and not just the topsoil. We highlight that soil health has different connotations depending on the environmental setting and may show high spatial and temporal dynamics. Although the biological activity is often concentrated in the surficial horizon, we report increasing evidence that deep soil horizons host relevant biological communities, which are regulated by soil conditions that are usually different from those present in the topsoil. The processes responsible for the formation of surface and subsurface soil genetic horizons produce soil features that select the presence of organisms. The natural self-organization of soil features is at the basis of the soil classification systems and of their ability to differentiate soil taxa and appreciate pedodiversity. Examples are reported of surface and deep soil genetic horizons as an important interpretative tool of soil functional biodiversity and soil health. Therefore, the assessing and monitoring of soil health should not be carried out at fixed depth, but according to soil genetic horizons. We conclude that the loss of the natural self-organization of genetic horizons is a form of soil health degradation.

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“…Development of the RSA during the seedling stage has been linked with important adaptations to genotype-environment (G×E) interactions, such as the reaction to abiotic stress and nutrient use efficiency ( Lynch, 2022 ). The soil structure also affects early RSA, as Mawodza et al. (2021) showed that finer macro-aggregates increase the total lateral root length, whilst coarser macro-aggregates increase axial root growth.…”

Section: Introductionmentioning

confidence: 99%

Precrop-treated soil influences wheat (Triticum aestivum L.) root system architecture and its response to drought

Cope,

Berckx,

Galinski

et al. 2024

Front. Plant Sci.

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AimsRoot system architecture (RSA) plays an important role in the plant’s ability to sustain yield under abiotic stresses such as drought. Preceding crops (precrops) can affect the yield of the proceeding crop, partially by affecting the RSA. This experiment aims to explore the interactions between precrop identity, crop genotype and drought at early growth stages.MethodsRhizotrons, sized 60 × 80 × 3.5 cm, were used to assess the early root growth of two winter wheat (Triticum aestivum L.) genotypes, using precrop-treated soil around the seedlings and differing water regimes. The rhizotrons were automatically imaged 3 times a week to track root development.ResultsPrecrop-treated soil affected the RSA and changes caused by the reduced water treatment (RWT) were different depending on the precrop. Largest of these was the 36% reduction in root depth after wheat, but 44% after OSR. This indicates that effects caused by the precrop can be simulated, at least partially, by transferring precrop-treated soils to controlled environments. The genotypes had differential RSA and reacted differently to the RWT, with Julius maintaining an 8.8-13.1% deeper root system compared to Brons in the RWT. In addition, the combined environmental treatment affected the genotypes differently.ConclusionOur results could help explain discrepancies found from using precrops to enhance yield as they indicate differences in the preceding crop effect when experiencing drought stress. Further, these differences are affected by genotypic interactions, which can be used to select and adapt crop genotypes for specific crop rotations, depending on the year. Additionally, we have shown a viable method of stimulating a partial precrop effect at the seedling stage in a controlled greenhouse setting using field soil around the germinated seed.

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Preferential wheat (Triticum aestivum. L cv. Fielder) root growth in different sized aggregates

Cited by 12 publications

References 60 publications

New Insights into the Bio-Chemical Changes in Wheat Induced by Cd and Drought: What Can We Learn on Cd Stress Using Neutron Imaging?

New Insights into the Bio-Chemical Changes in Wheat Induced by Cd and Drought: What Can We Learn on Cd Stress Using Neutron Imaging?

Soil health, soil genetic horizons and biodiversity^#

Precrop-treated soil influences wheat (Triticum aestivum L.) root system architecture and its response to drought

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Preferential wheat (Triticum aestivum. L cv. Fielder) root growth in different sized aggregates

Cited by 12 publications

References 60 publications

New Insights into the Bio-Chemical Changes in Wheat Induced by Cd and Drought: What Can We Learn on Cd Stress Using Neutron Imaging?

New Insights into the Bio-Chemical Changes in Wheat Induced by Cd and Drought: What Can We Learn on Cd Stress Using Neutron Imaging?

Soil health, soil genetic horizons and biodiversity#

Precrop-treated soil influences wheat (Triticum aestivum L.) root system architecture and its response to drought

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Product

Resources

About

Soil health, soil genetic horizons and biodiversity^#