Matching the Expression of Root Plasticity with Soil Moisture Availability Maximizes Production of Rice Plants Grown in an Experimental Sloping Bed having Soil Moisture Gradients

Kameoka, Emi; Suralta, Roel Rodriguez; Mitsuya, Shiro; Yamauchi, Akira

doi:10.1626/pps.18.267

Cited by 23 publications

(50 citation statements)

References 39 publications

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“…Furthermore, in NERICA 1, the total root length in the 0-20-cm soil layer was not correlated with shoot dry weight under moderate drought conditions in the sloping bed system (Figure 3a). These results are in agreement with those reported by Kameoka et al (2015) suggesting that root plasticity expressed in soil layers where moisture is less available may not contribute to maintaining dry matter production in upland NERICA varieties.…”

Section: Expression Of Root Plasticity In Deep Root Developmentsupporting

confidence: 93%

“…Phenotypic plasticity is a key trait for the adaptation of rice plants to drought conditions (Kamoshita et al, 2008;Kano et al, 2011;Niones et al, 2012;Tran et al, 2014a). Tran et al (2014b) showed that root plasticity triggered by drought was clearly expressed under relatively compacted soils, while Kameoka et al (2015) showed that rice varieties expressed root plasticity either as lateral root development on the soil surface or dry matter allocation to deep root development. According to Tran et al (2015), such plastic changes in the rice root were triggered , and a total nitrogen content of 1.3 g kg −1…”

Section: Field Experimentsmentioning

confidence: 99%

“…The design and soil moisture manipulation of the sloping bed system were the same as those described by Kameoka et al (2015). Briefly, the sloping bed was established using removable aluminum panes in a water tight pool with an underlying impermeable plastic sheet at an inclination angle of 15°.…”

Section: Experiments 1 Evaluation Of Plasticity In Deep Root Developmentmentioning

confidence: 99%

“…One is a sloping bed system with a gradient of soil depths from 30 to 65 cm to allow for the expression of deep root traits in response to the lowering of available soil moisture to deeper soil layers. Kameoka et al (2015) revealed that a sloping bed can effectively create a gradient of available water both along the soil surface and along the vertical soil profile by manipulating the ground water level. The other experimental system is a line-source sprinkler system with a soil depth of approximately 20 cm, which is expected to eliminate the advantageous effects of the deep root trait.…”

Section: Introductionmentioning

confidence: 99%

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Drought-induced root plasticity of two upland NERICA varieties under conditions with contrasting soil depth characteristics

Menge

Kameoka

Kano‐Nakata

et al. 2016

Plant Production Science

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To identify differences in root plasticity patterns of two upland New Rice for Africa (NERICA) varieties, NERICA 1 and 4, in response to drought under conditions with contrasting soil profile characteristics, soil moisture gradients were imposed using a sloping bed system with depths ranging 30-65 cm and a line-source sprinkler system with a uniformly shallow soil layer of 20 cm depth. Varietal differences in shoot and root growths were identified only under moderate drought conditions, 11-18% v/v soil moisture content. Further, under moderate drought soil conditions where roots could penetrate into the deep soil layer, deep root development was greater in NERICA 4 than in NERICA 1, which contributed to maintaining dry matter production. However, under soil conditions with underground impediment to deep root development, higher shoot dry weight was noted for NERICA 1 than for NERICA 4 at 11-18% v/v soil moisture content, which was attributed to increased lateral root development in the shallow soil layer in NERICA 1. Enhanced lateral root development in the 0-20-cm soil layer was identified in NERICA 1 even under soil conditions without an impediment to deep root development; however, this did not contribute to maintaining dry matter production in upland rice. Thus, we show different root developmental traits associated with drought avoidance in the two NERICA varieties, and that desirable root traits for upland rice cultivation vary depending on the target soil environment, such as the distribution of soil moisture and root penetration resistance.

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Section: Expression Of Root Plasticity In Deep Root Developmentsupporting

confidence: 93%

Section: Field Experimentsmentioning

confidence: 99%

Section: Experiments 1 Evaluation Of Plasticity In Deep Root Developmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Drought-induced root plasticity of two upland NERICA varieties under conditions with contrasting soil depth characteristics

Menge

Kameoka

Kano‐Nakata

et al. 2016

Plant Production Science

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“…Root plasticity that is expressed in response to such complex and heterogeneous soil environment is a key trait for plant adaptation ). In particular, we have shown that the plasticity of root system development is a key trait for plant adaptation to various types of water stress (Bañoc et al 2000, Subere et al 2009, Suralta et al 2010, Niones et al 2012, Tran et al 2014, Kameoka et al 2015.…”

Section: Introductionmentioning

confidence: 93%

Quantitative evaluation of plastic root responses to contiguous water gradient in rice

et al. 2017

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Root plasticity is the key trait for plant adaptation to environmental stresses. To quantify phenotypic plasticity to its full extent in potential, it needs to be evaluated under contiguous environmental changes. For that purpose, we used the combination of chromosome segment substitution lines (Nipponbare/Kasalath CSSLs) and line source sprinkler (LSS) system of irrigation. For analysis, we first attempted to apply the coefficient of variation (CV) and norm of reaction that have been used as the conventional approaches, and then propose a new approach for quantification of root plasticity. Results revealed that CV was not linked to root plasticity under contiguous water gradient in this study. In contrast, norm of reaction was linked to root plasticity and better explained with curve than linear, especially for CSSL50 (the most plastic genotypes) under such gradient. Based on the norm of reaction with curve, root plasticity was calculated using the difference in total root length between CSSLs and the recurrent parent, Nipponbare. Further analysis of root plasticity in relation to dry matter production was also done. By applying the new approach, we confirmed that root plasticity expression was affected by the intensities of drought stress and genotypes, indicating that such root plasticity is genetically controlled. In addition, root plasticity effectively contributed to the dry matter production under the drought conditions and maximized at around 20% of soil moisture content (-0.04 MPa). By using CSSLs and LSS system, we successfully evaluated root plasticity under contiguous water gradient.

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Bioenergy Underground: Challenges and opportunities for phenotyping roots and the microbiome for sustainable bioenergy crop production

York

Cumming

Trusiak

et al. 2022

The Plant Phenome Journal

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Bioenergy production often focuses on the aboveground feedstock production for conversion to fuel and other materials. However, the belowground component is crucial for soil carbon sequestration, greenhouse gas fluxes, and ecosystem function. Roots maximize feedstock production on marginal lands by acquiring soil resources and mediating soil ecosystem processes through interactions with the microbial community. This belowground world is challenging to observe and quantify; however, there are unprecedented opportunities using current methodologies to bring roots, microbes, and soil into focus. These opportunities allow not only breeding for increased feedstock production but breeding for increased soil health and carbon sequestration as well. A recent workshop hosted by the USDOE Bioenergy Research Centers highlighted these challenges and opportunities while creating a roadmap for increased collaboration and data interoperability through standardization of methodologies and data using F.A.I.R. principles. This article provides a background on the need for belowground research in bioenergy cropping systems, a primer on root system properties of major U.S. bioenergy crops, and an overview of the roles of root chemistry, exudation, and microbial interactions on sustainability. Crucially, we outline how to adopt standardized measures and databases to meet the most pressing methodological needs to accelerate root, soil, and microbial research to meet the pressing societal challenges of the century.

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Matching the Expression of Root Plasticity with Soil Moisture Availability Maximizes Production of Rice Plants Grown in an Experimental Sloping Bed having Soil Moisture Gradients

Cited by 23 publications

References 39 publications

Drought-induced root plasticity of two upland NERICA varieties under conditions with contrasting soil depth characteristics

Drought-induced root plasticity of two upland NERICA varieties under conditions with contrasting soil depth characteristics

Quantitative evaluation of plastic root responses to contiguous water gradient in rice

Bioenergy Underground: Challenges and opportunities for phenotyping roots and the microbiome for sustainable bioenergy crop production

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