Synergy between a shallow root system with a DRO1 homologue and localized P application improves P uptake of lowland rice

Oo, Aung Zaw; Tsujimoto, Yasuhiro; Mukai, Mana; Nishigaki, Tomohiro; Takai, Toshiyuki; Uga, Yusaku

doi:10.1038/s41598-021-89129-z

Cited by 23 publications

(9 citation statements)

References 32 publications

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“…Oo et al (2021) compared the growth of the near-isogenic lines (NILs) qsor1-NIL, Dro1-NIL, and IR64, which produced shallow, deep, and intermediate RGAs, respectively, in soils in which Pi accumulated in the surface layer. The qsor1-NIL plants with shallow root growth had the greatest biomass and Pi uptake, suggesting that a shallow root system is beneficial for rice Pi uptake [ 108 ].…”

Section: Hints For Improving Pi-efficient Root Architecture In Cropsmentioning

confidence: 99%

Phenotypes and Molecular Mechanisms Underlying the Root Response to Phosphate Deprivation in Plants

Ren

Zhu

et al. 2023

IJMS

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Phosphorus (P) is an essential macronutrient for plant growth. The roots are the main organ for nutrient and water absorption in plants, and they adapt to low-P soils by altering their architecture for enhancing absorption of inorganic phosphate (Pi). This review summarizes the physiological and molecular mechanisms underlying the developmental responses of roots to Pi starvation, including the primary root, lateral root, root hair, and root growth angle, in the dicot model plant Arabidopsis thaliana and the monocot model plant rice (Oryza sativa). The importance of different root traits and genes for breeding P-efficient roots in rice varieties for Pi-deficient soils are also discussed, which we hope will benefit the genetic improvement of Pi uptake, Pi-use efficiency, and crop yields.

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Section: Hints For Improving Pi-efficient Root Architecture In Cropsmentioning

confidence: 99%

Phenotypes and Molecular Mechanisms Underlying the Root Response to Phosphate Deprivation in Plants

Ren

Zhu

et al. 2023

IJMS

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“…The experimental soil was collected from the subsoil layer (40-50 cm depth) at the JIRCAS Tropical Agricultural Research Front, Okinawa, Japan (26.5 o N, 135.7 o E). The physicochemical properties of the experimental soil were summarized by Oo et al (2021). The soil was silty clay with a pH (H 2 O) of 4.86.…”

Section: Experimental Designmentioning

confidence: 99%

“…During the experiment, the daily average temperatures in the greenhouse ranged from 26.5°C to 35.3°C (Thermo Recorder TR-50U2, T&D Corporation, Japan).The experimental soil was collected from the subsoil layer (40-50 cm depth) at the JIRCAS Tropical Agricultural Research Front, Okinawa, Japan (26.5 o N, 135.7 o E). The physicochemical properties of the experimental soil were summarized by Oo et al (2021). The soil was silty clay with a pH (H 2 O) of 4.86.…”

mentioning

confidence: 99%

Potential role of rhizosphere microbiome on root exudations and phosphorus uptake of rice under flooded soil culture

Mukai¹,

Hiruma²,

Nishigaki³

et al. 2022

Preprint

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Purpose The response of rice plants to P deficiency together with rhizosphere microorganisms is yet to be explored in flooded soil cultures. This study aimed to identify how alterations in bacterial diversity are associated with underground metabolic and chemical reactions in the rhizosphere of rice. Methods Two rice varieties were grown in a split-root box under flooded conditions and filled with either P-applied or non-P-applied soils with or without γ-irradiation. At 41–42 days after transplanting, plant biomass, P uptake, exudation rates of total carbon and low-molecular-weight organic acids (LMWOAs) from the roots, and bacterial diversity, P fractions, and phosphatase activity in the rhizosphere were determined. Results γ-irradiation significantly decreased plant P uptake and biomass of both varieties and reduced the relative abundance of Alphaproteobacteria and microbiome beta diversity in the rhizosphere. Concurrently, the use of insoluble P in soils was evidently reduced by irradiation. These microbiological and chemical changes in the γ-irradiated rhizosphere occurred in both P-applied and non-P-applied soils. On the other hand, the proportion of LMWOAs and exudation of citric acid, high in P-solubilization capacity were increased in the γ-irradiated and P-applied rhizosphere soils at the expense of other carbons. No differences were detected in phosphatase activity in any treatments. Conclusion Dysbiosis in the rhizosphere microbiome negatively affected rice growth and the use of insoluble P pools in flooded soil cultures. With a reduction in microbiome diversity, rice plants may have a complementary strategy to increase the exudation proportion of citric acid toward the P-rich soil area.

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“…1). In rice, SORs allow plants to escape the salinity of deeper soil (Kitomi et al 2020) and to take up phosphorous distributed in the surface soil layer (Oo et al 2021). Under waterlogged conditions, SORs are produced by many grass species including rice (Lafitte et al 2001), maize (Mano et al 2005a(Mano et al , 2005c, teosinte (Mano et al 2009, Mano andNakazono, 2021), Italian ryegrass (Tase and Kobayasi 1992) and other wetland species (Justin andArmstrong 1987, Visser et al 1996).…”

Section: Introductionmentioning

confidence: 99%

Development of a method for high-throughput quantitation of soil-surface roots of rice (<i>Oryza sativa</i>) and wild rice (<i>O. glumaepatula</i>) using an overhead scanner

Miyashita

Shiono

2023

Plant Root

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SOil-surface Roots (SORs) are roots that elongate over or near the soil surface. They allow plants to escape waterlogging-caused hypoxia and high salinity that are often present in deeper soil. Quantitative evaluation is essential for understanding SOR function and identifying the genes and quantitative trait loci (QTLs) that control it. However, existing methods to evaluate SOR formation are laborious/slow or semiquantitative. Here, we describe a high-throughput quantitative SOR evaluation system that uses an overhead scanner. We evaluated SORs in 56 wild rice (Oryza glumaepatula) introgression lines (ILs) with the genetic background of O. sativa. The method can quantify the SOR area of a plant in less than 90 sec. During the image analysis process, multithreshold segmentation on the scanned images reduced the reflection noise of the digital image and improved the accuracy of the estimation of SORs formation. The root surface areas of SORs of the O. glumaepatula ILs varied widely, which should make them well-suited for identifying SOR-related QTLs. The overhead scanner method has the potential to quantitatively and rapidly evaluate SORs developed on the soil surface.

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Synergy between a shallow root system with a DRO1 homologue and localized P application improves P uptake of lowland rice

Cited by 23 publications

References 32 publications

Phenotypes and Molecular Mechanisms Underlying the Root Response to Phosphate Deprivation in Plants

Phenotypes and Molecular Mechanisms Underlying the Root Response to Phosphate Deprivation in Plants

Potential role of rhizosphere microbiome on root exudations and phosphorus uptake of rice under flooded soil culture

Development of a method for high-throughput quantitation of soil-surface roots of rice (<i>Oryza sativa</i>) and wild rice (<i>O. glumaepatula</i>) using an overhead scanner

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