Quantifying variations in rhizosheath and root system phenotypes of landraces and improved varieties of juvenile maize

Adu, Michael O.; Asare, Paul A.; Yawson, David O.; Ackah, Frank K.; Amoah, Kwadwo Kusi; Nyarko, Mishael A.; Andoh, Dick A.

doi:10.1016/j.rhisph.2016.12.004

Cited by 34 publications

(28 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A previous study in wheat established a strong relationship between root hair length and rhizosheath size (Delhaize et al ); in barley, the correlation was still positive, but much weaker (George et al ). In addition, Adu et al () reported an inconsistent relationship between rhizosheath size and root hair length. Based on these studies, the relationship between root hairs and the rhizosheath might differ by species and/or rhizosheath size may be determined by additional factors, other than root hair length and density.…”

Section: Discussionmentioning

confidence: 99%

Rhizosheath formation and involvement in foxtail millet (Setaria italica) root growth under drought stress

Liu

Song

et al. 2018

JIPB

View full text Add to dashboard Cite

The rhizosheath, a layer of soil particles that adheres firmly to the root surface by a combination of root hairs and mucilage, may improve tolerance to drought stress. Setaria italica (L.) P. Beauv. (foxtail millet), a member of the Poaceae family, is an important food and fodder crop in arid regions and forms a larger rhizosheath under drought conditions. Rhizosheath formation under drought conditions has been studied, but the regulation of root hair growth and rhizosheath size in response to soil moisture remains unclear. To address this question, in this study we monitored root hair growth and rhizosheath development in response to a gradual decline in soil moisture. Here, we determined that a soil moisture level of 10%-14% (w/w) stimulated greater rhizosheath production compared to other soil moisture levels. Root hair density and length also increased at this soil moisture level, which was validated by measurement of the expression of root hair-related genes. These findings contribute to our understanding of rhizosheath formation in response to soil water stress.

show abstract

Section: Discussionmentioning

confidence: 99%

Rhizosheath formation and involvement in foxtail millet (Setaria italica) root growth under drought stress

Liu

Song

et al. 2018

JIPB

View full text Add to dashboard Cite

show abstract

“…This experiment was conducted at the Teaching and Research Farm of the School of Agriculture, University of Cape Coast (UCC; 5.1155°N, 1.2909°W) from April 5 th to June 5 th , 2017. The soil and environmental conditions for the present study has previously been described in Adu et al. (2017a) .…”

Section: Methodsmentioning

confidence: 99%

“…Temperature and relative humidity at the experimental site ranged between approximately 24 °C to 32 °C and 60% to 80%, respectively. Day length ranges from approximately 11.30 to 12.40 hours while solar radiation ranges from 3151 kJ cm −2 day −1 to 3804 kJ cm −2 day −1 , respectively ( Adu et al., 2017a ).…”

Section: Methodsmentioning

confidence: 99%

Characterising shoot and root system trait variability and contribution to genotypic variability in juvenile cassava (Manihot esculenta Crantz) plants

Adu

Asare

Asare‐Bediako

et al. 2018

Heliyon

View full text Add to dashboard Cite

The development of cassava genotypes with root system traits that increase soil resource acquisition could increase yields on infertile soils but there are relatively few work that has quantified cassava root system architecture (RSA). We used an easily adaptable and inexpensive protocol to: (i) measure genotypic variation for RSA and shoot traits of a range of cassava genotypes; and (ii) identify candidate variables that contribute the largest share of variance. Cassava genotypes were grown in soil-filled pots, maintained at 70% field capacity. Shoot and RSA traits were measured on plants grown up to 30, 45 and 60 days. Multivariate analysis was used to determine major traits contributing to variation. The study showed that cassava roots are adventitious in origin consisting of a main root axis and orders of lateral roots, and therefore the historically used term “fibrous roots” are redundant currently not contributing to clarity. There were significant differences (P < 0.05) for traits evaluated. The highest relative root growth rate occurred over the first 30 days and ranged from 0.39 to 0.48 cm day−1. Root fresh weight was significantly correlated with other traits, including root length (r = 0.79), leaf area (r = 0.72), number of lower nodal roots (r = 0.60), indicating that direct selection based on these traits might be sufficient to improve root biomass. Up to the first six principal components explained over 80% of the total variation among the genotypes for the traits measured at 30, 45 and 60 days. Leaf area, root diameter and branching density-related traits were the most important traits contributing to variation. Selection of cassava genotypes based on shoot and root biomass, root diameter and branching density at juvenile growth stage could be successful predictors of nutrient and water-use efficiency in the field. Further studies are required to relate studied juvenile cassava root traits with the performance of field-grown-mature plant with regard to drought, nutrient-use efficiency and yield.

show abstract

“…High-molecular weight glycan exudates, soil-binding factors, rhizosheaths and the rhizosphere Rhizosheaths have been a focus for much recent work and consideration of their potential to be important factors associated with enhanced nutrient and water uptake, and are a potential breeding target particularly for water-limited grain crops (George et al, 2014;York et al, 2016;Adu et al, 2017;Brown et al, 2017;Rabbi et al, 2018;Young and Bengough, 2018). Understanding the mechanistic basis of their formation and stabilisation is therefore of broad economic and social interest.…”

Section: Wheatmentioning

confidence: 99%

Cereal root exudates contain highly structurally complex polysaccharides with soil‐binding properties

et al. 2020

View full text Add to dashboard Cite

Summary Rhizosheaths function in plant−soil interactions, and are proposed to form due to a mix of soil particle entanglement in root hairs and the action of adhesive root exudates. The soil‐binding factors released into rhizospheres to form rhizosheaths have not been characterised. Analysis of the high‐molecular‐weight (HMW) root exudates of both wheat and maize plants indicate the presence of complex, highly branched polysaccharide components with a wide range of galactosyl, glucosyl and mannosyl linkages that do not directly reflect cereal root cell wall polysaccharide structures. Periodate oxidation indicates that it is the carbohydrate components of the HMW exudates that have soil‐binding properties. The root exudates contain xyloglucan (LM25), heteroxylan (LM11/LM27) and arabinogalactan‐protein (LM2) epitopes, and sandwich‐ELISA evidence indicates that, in wheat particularly, these can be interlinked in multi‐polysaccharide complexes. Using wheat as a model, exudate‐binding monoclonal antibodies have enabled the tracking of polysaccharide release along root axes of young seedlings, and their presence at root hair surfaces and in rhizosheaths. The observations indicate that specific root exudate polysaccharides, distinct from cell wall polysaccharides, are adhesive factors secreted by root axes, and that they contribute to the formation and stabilisation of cereal rhizosheaths.

show abstract

Quantifying variations in rhizosheath and root system phenotypes of landraces and improved varieties of juvenile maize

Cited by 34 publications

References 47 publications

Rhizosheath formation and involvement in foxtail millet (Setaria italica) root growth under drought stress

Rhizosheath formation and involvement in foxtail millet (Setaria italica) root growth under drought stress

Characterising shoot and root system trait variability and contribution to genotypic variability in juvenile cassava (Manihot esculenta Crantz) plants

Cereal root exudates contain highly structurally complex polysaccharides with soil‐binding properties

Contact Info

Product

Resources

About