Nitrogen application enhanced the expression of developmental plasticity of root systems triggered by mild drought stress in rice

Tran, Thiem Thi; Kano‐Nakata, Mana; Takeda, Moe; Menge, Daniel Makori; Mitsuya, Shiro; Inukai, Yoshiaki; Yamauchi, Akira

doi:10.1007/s11104-013-2013-5

Cited by 60 publications

(52 citation statements)

References 35 publications

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“…The results of this study confirmed that there are genotypic differences in root developmental traits associated with drought avoidance in rice, in accordance with other papers (e.g. Kano et al, 2011;Tran et al, 2014a). This study revealed that NERICA 4 has greater plasticity in deep root development, while NERICA 1 has greater plasticity in lateral root development, and the varietal differences in root plasticity were observed especially clearly under moderate drought conditions.…”

Section: Discussionsupporting

confidence: 92%

“…This indicates that the enhanced root systems contributed to the dry matter production when the advantageous effect of a deep root trait is eliminated. This result is consistent with those reported previously by Kano et al (2011) and Tran et al (2014a). In the sloping bed system, however, NERICA 1 reduced shoot dry weight under moderate drought conditions (Figure 1), even though lateral root development in the shallow soil layer was enhanced (Table 1).…”

Section: Expression Of Root Plasticity In Deep Root Developmentsupporting

confidence: 92%

“…This indicates that NERICA 1 has greater root plasticity in lateral root development than NERICA 4 and Lemont under field conditions with an underground impediment to root penetration. Varietal differences in root plasticity in lateral root development have been observed at 21-42% v/v soil moisture content (considered to be mild drought to well-watered conditions in our study) for lowland rice varieties (Kano et al, 2011;Tran et al, 2014a). Our results imply that varietal differences in root plasticity in lateral root development for upland varieties may be more clearly observed under drier soil moisture conditions than those of lowland varieties.…”

Section: Expression Of Root Plasticity In Lateral Root Developmentsupporting

confidence: 56%

“…alterations in water and nutrient uptake capacity) (Hodge, 2003) as environmental conditions change is known as phenotypic plasticity. 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.…”

Section: Field Experimentsmentioning

confidence: 99%

“…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. The line-source sprinkler system was previously used to evaluate the plasticity in lateral root development in the shallow soil layer in response to different intensities of drought stress (Kano et al, 2011;Tran et al, 2014a). A comparative analysis of root and shoot growth responses to various intensities of drought stress in the two systems should clarify the genotypic differences in drought avoidance-related root traits.…”

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: Discussionsupporting

confidence: 92%

Section: Expression Of Root Plasticity In Deep Root Developmentsupporting

confidence: 92%

Section: Expression Of Root Plasticity In Lateral Root Developmentsupporting

confidence: 56%

Section: Field Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 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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Water‐saving cultivation plus super rice hybrid genotype improves water productivity and yield

et al. 2020

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Labor shortage, low water availability, and poor land use practice cause serious threats to rice (Oryza sativa L.) production around the world. Semiarid cultivation is a classical strategy for achieving high water productivity (WP) with lower labor inputs. However, it remains largely unknown whether the application of "super" or drought-resistant hybrid rice could achieve higher economic benefits (WP and yield) under semiarid cultivation. This study attempted to combine three irrigation management systems (semiarid rice cultivation, traditional flood irrigation, and dryland cultivation) with two cultivars (Yangliangyou 6, YLY6, a super hybrid rice genotype; Hanyou 113, HY113, a drought-resistant rice genotype), and evaluate their effects on the water-saving ability and yield (the economic benefits). The two genotypes showed no significant differences in grain yield under the semiarid and flood irrigation, and both had a greater WP (13.8-51.8%) under semiarid cultivation than under flood irrigation. YLY6 produced more panicles (P < .05), more spikelets per panicle (P < .05), and higher grain yield (P < .01) than HY113. Semiarid cultivation plus YLY6 showed higher stomatal conductance and net photosynthetic rate (P < .05), resulting in higher biomass accumulation, grain yield, and WP compared with those under other treatments. YLY6 under semiarid cultivation had greater stem water content and leaf water potential, and thus showed improvement of leaf gas exchange characteristics. In conclusion, super hybrid rice has the potential to achieve greater WP and higher grain yield under semiarid irrigation, and this combination may be introduced for sustainable rice production.

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Understanding role of roots in plant response to drought: Way forward to climate‐resilient crops

Kalra,

Goel,

Elias

2023

The Plant Genome

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Drought stress leads to a significant amount of agricultural crop loss. Thus, with changing climatic conditions, it is important to develop resilience measures in agricultural systems against drought stress. Roots play a crucial role in regulating plant development under drought stress. In this review, we have summarized the studies on the role of roots and root‐mediated plant responses. We have also discussed the importance of root system architecture (RSA) and the various structural and anatomical changes that it undergoes to increase survival and productivity under drought. Various genes, transcription factors, and quantitative trait loci involved in regulating root growth and development are also discussed. A summarization of various instruments and software that can be used for high‐throughput phenotyping in the field is also provided in this review. More comprehensive studies are required to help build a detailed understanding of RSA and associated traits for breeding drought‐resilient cultivars.

show abstract

Nitrogen application enhanced the expression of developmental plasticity of root systems triggered by mild drought stress in rice

Cited by 60 publications

References 35 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

Water‐saving cultivation plus super rice hybrid genotype improves water productivity and yield

Understanding role of roots in plant response to drought: Way forward to climate‐resilient crops

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