دورية أكاديمية
Genotypic Variation in Nitrogen Uptake during Early Growth among Rice Cultivars under Different Soil Moisture Regimes
| العنوان: | Genotypic Variation in Nitrogen Uptake during Early Growth among Rice Cultivars under Different Soil Moisture Regimes |
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| المؤلفون: | Maya Matsunami, Toshinori Matsunami, Kazuhiro Kon, Atsushi Ogawa, Ikuko Kodama, Makie Kokubun |
| المصدر: | Plant Production Science, Vol 16, Iss 3, Pp 238-246 (2013) |
| بيانات النشر: | Taylor & Francis Group, 2013. |
| سنة النشر: | 2013 |
| المجموعة: | LCC:Plant culture |
| مصطلحات موضوعية: | Nitrogen uptake ability, Nitrogen use efficiency, Rice Diversity Research Set of germplasm, Soil moisture, Water uptake ability, Plant culture, SB1-1110 |
| الوصف: | In order to enhance rice productivity under water-deficient conditions, it is essential to improve nitrogen (N) uptake ability or its use efficiency. The objectives of the present study were to examine the genotypic variation in N uptake ability and physiological N use efficiency (PNUE) among 70 rice cultivars, and to clarify its association with biomass production and water uptake ability. Plants were grown under three soil moisture regimes: flooded and two non-flooded (−0.10 and −0.52 MPa soil water potential) conditions. A substantial genotypic variation in the amount of aboveground N uptake was observed, and the amount bore a positive correlation with aboveground biomass production regardless of soil moisture regime, whereas PNUE showed a negative if any correlation with biomass production depending on soil moisture regime. A significant interactive effect on the amount of aboveground N uptake between cultivars and soil moisture regimes was observed; there existed cultivars that exhibited superior N uptake only under non-flooded conditions. N uptake ability was closely correlated with water uptake ability, while a substantial genotypic variation in N uptake per unit water uptake was found in the two non-flooded regimes. These results indicate that a substantial genotypic variation in N uptake ability under water deficient conditions exists among diverse rice genetic resources, and that the variation is associated with water uptake ability and biomass production under the water-limited conditions at the early growth stage. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1343-943X 1349-1008 |
| Relation: | https://doaj.org/toc/1343-943X; https://doaj.org/toc/1349-1008 |
| DOI: | 10.1626/pps.16.238 |
| URL الوصول: | https://doaj.org/article/e6a759dc58f34d76a5719c9c038f235b |
| رقم الأكسشن: | edsdoj.6a759dc58f34d76a5719c9c038f235b |
| قاعدة البيانات: | Directory of Open Access Journals |
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Full Text Finder | تدمد: | 1343943X 13491008 |
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| DOI: | 10.1626/pps.16.238 |