Genotypic Variation in Nitrogen Uptake during Early Growth among Rice Cultivars under Different Soil Moisture Regimes

Matsunami, Toshinori; Kon, Kazuhiro; Ogawa, Atsushi; Kodama, Ikuko; Kokubun, Makie

doi:10.1626/pps.16.238

Cited by 13 publications

(10 citation statements)

References 22 publications

(27 reference statements)

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“…On the other hand, WUE remained relatively stable at all levels of SMC, and WUE was not highly correlated with shoot dry matter production in this study (data not shown). Water uptake capacity may be more significant than WUE in determining biomass production under drought conditions, as reported by previous studies [23] [24]. The general trend of increasing 13 C in the shoot with drought stress found in the present study agrees with the results of previous studies on rice [5]- [8].…”

Section: Discussionsupporting

confidence: 93%

Effect of Various Intensities of Drought Stress on δ<sup>13</sup>C Variation among Plant Organs in Rice: Comparison of Two Cultivars

Kano‐Nakata¹,

Tatsumi²,

Inukai³

et al. 2014

AJPS

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The δ 13 C value is widely used to assess the effects of drought on water status in plants. However, there is little information regarding the δ 13 C signature in different organs of rice. We conducted a field study to examine whether the δ 13 C among different plant parts would be affected by the intensities of drought, and to evaluate genotypic variation in δ 13 C fluctuation among plant parts affected by drought intensities. Two cultivars, "Nipponbare" (Oryzasativa ssp. japonica) and "Kasalath" (O. sativa ssp. indica), were grown in the field with a line-source sprinkler system. The δ 13 C values of panicles, flag leaves, straws, culms, and roots were measured from plant samples. The δ 13 C value increased as drought stress increased, especially in the panicles and roots. "Nipponbare" showed higher values of δ 13 C than "Kasalath" under the well-watered and mild drought stress conditions, but there was no significant difference between the genotypes in the δ 13 C value under the severe drought stress condition. The variation in δ 13 C value among different plant parts was also increased with increasing drought stress. In contrast, these variations were small under well-watered conditions. Furthermore, there was much greater variation in the δ 13 C value among different plant parts in "Kasalath" than in "Nipponbare" when the plants were grown under drought stress conditions. A significant negative relationship was observed between the δ 13 C value of panicles and shoot dry matter production, suggesting that the δ 13 C value of panicles may be the best indicator of plant water status in rice.

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Section: Discussionsupporting

confidence: 93%

Effect of Various Intensities of Drought Stress on δ<sup>13</sup>C Variation among Plant Organs in Rice: Comparison of Two Cultivars

Kano‐Nakata¹,

Tatsumi²,

Inukai³

et al. 2014

AJPS

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“…Katsura and Nakaide (2011) showed that the ability of rice roots to oxidize substances in the rhizosphere in aerobic culture was higher than in flooded culture. High root physiological activity is essential for N uptake (Samejima et al, 2004;Matsunami et al, 2012Matsunami et al, , 2013. Many researchers have suggested that aeration of the soil is important in conventional flooded culture because it allows the plants to maintain high root activity (Ramasamy et al, 1997;Yang et al, 2004).…”

Section: Physiological Attributes That Increase Rice Yield Under Aeromentioning

confidence: 99%

Rice Adaptation to Aerobic Soils: Physiological Considerations and Implications for Agronomy

Kato

Katsura

2014

Plant Production Science

106

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Aerobic culture is a water-saving technique for direct-seeded rice cultivation. Growing rice under continuously unsaturated soil conditions can maximize water-use efficiency and minimize both labor requirements and greenhouse-gas emissions. Under a temperate climate, aerobic culture can produce a rice yield greater than 9 t ha-1 especially in central Japan (11.4 t ha-1). Aerobic culture using large-scale center-pivot sprinklers is being established in the central United States, where yields can surpass 10 t ha-1. However, yields remain at less than 8 t ha-1 in the tropics. The high yield of Japanese aerobic culture is mainly attributed to vigorous nitrogen uptake during the reproductive stage, which allows rice plants to produce more spikelets and biomass. Fertilizer management for aerobic culture must satisfy both the nitrogen demand and control spikelet density to achieve an appropriate sink-source balance. Unfortunately, the poor development of the root system in rice limits its water uptake from unsaturated soil. Adaptive responses such as adventitious root emergence, lateral root branching, and deep root penetration would protect the plants against dehydration stress in aerobic culture. Intermediate plant height with a few large tillers rather than semi-dwarf stature with profuse tillering should be a suitable plant type for aerobic culture, and plants should show leaf expansion despite fluctuations of soil moisture. The development and identification of suitable genotypes and crop management options are underway worldwide for more resource-use efficient and productive aerobic rice culture.

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“…During the last decades, many investigations have been reported, related to nitrogen efficiency of different plant genotypes (Fang and Wu, 2001;Fang et al, 2004, Zhao et al, 2012. Matsunami et al (2013) indicated that substantial genotypic variation in N uptake ability under water deficient conditions exists among diverse rice genetic resources. Other field experiments have shown that genetic variability for N use efficiency exists in rice (Tirol-Padre et al, 1996;Singh et al, 1998;Inthapanya et al, 2000b).…”

Section: Relationship Between Varieties To N Supply and Absorptionmentioning

confidence: 99%

Nitrogen use efficiency by selected NERICA varieties in Burkina Faso

Segda¹,

Yameogo²,

Sié³

et al. 2014

Afr. J. Agric. Res.

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A field experiment was carried out in the 2005 and 2006 wet seasons in Bagré, Burkina Faso, to assess the differences in paddy yield and nitrogen (N) utilization of the New Rice for Africa (NERICA) lowland varieties. The test consists of a split-plot design with four replications. The main plots were represented by four NERICAs (NERICA L 41, NERICA L 60, NERICA L 20, and NERICA L 19) and one control (4418). Subplots were constituted with five rates of nitrogen fertilizer (0, 40, 80, 120 and 160 kg N ha-1). Significant differences (P<0.001) among varieties were observed in paddy yield and nitrogen uptake. Without nitrogen application (0N), NERICAs insure a good grain yield compared to the control (4418). The N-use efficient varieties that produced high paddy yield at both low and high levels of N were NERICA L 41, NERICA L 20 and NERICA L 19. NERICA L 60 that is not significantly different to the control (4418) appears less efficient as compared to the three other NERICAs.

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Genotypic Variation in Nitrogen Uptake during Early Growth among Rice Cultivars under Different Soil Moisture Regimes

Cited by 13 publications

References 22 publications

Effect of Various Intensities of Drought Stress on δ<sup>13</sup>C Variation among Plant Organs in Rice: Comparison of Two Cultivars

Effect of Various Intensities of Drought Stress on δ<sup>13</sup>C Variation among Plant Organs in Rice: Comparison of Two Cultivars

Rice Adaptation to Aerobic Soils: Physiological Considerations and Implications for Agronomy

Nitrogen use efficiency by selected NERICA varieties in Burkina Faso

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Genotypic Variation in Nitrogen Uptake during Early Growth among Rice Cultivars under Different Soil Moisture Regimes

Cited by 13 publications

References 22 publications

Effect of Various Intensities of Drought Stress on δ&lt;sup&gt;13&lt;/sup&gt;C Variation among Plant Organs in Rice: Comparison of Two Cultivars

Effect of Various Intensities of Drought Stress on δ&lt;sup&gt;13&lt;/sup&gt;C Variation among Plant Organs in Rice: Comparison of Two Cultivars

Rice Adaptation to Aerobic Soils: Physiological Considerations and Implications for Agronomy

Nitrogen use efficiency by selected NERICA varieties in Burkina Faso

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Product

Resources

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Effect of Various Intensities of Drought Stress on δ<sup>13</sup>C Variation among Plant Organs in Rice: Comparison of Two Cultivars

Effect of Various Intensities of Drought Stress on δ<sup>13</sup>C Variation among Plant Organs in Rice: Comparison of Two Cultivars