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Tolerance to low phosphorus was enhanced by an alternate wetting and drying regime in rice
Food and Energy Security ( IF 4.0 ) Pub Date : 2021-05-12 , DOI: 10.1002/fes3.294 Yaping Deng 1 , Shengfeng Qiao 1 , Weilu Wang 1 , Weiyang Zhang 1 , Junfei Gu 1 , Lijun Liu 1 , Hao Zhang 1 , Zhiqin Wang 1 , Jianchang Yang 1
Food and Energy Security ( IF 4.0 ) Pub Date : 2021-05-12 , DOI: 10.1002/fes3.294 Yaping Deng 1 , Shengfeng Qiao 1 , Weilu Wang 1 , Weiyang Zhang 1 , Junfei Gu 1 , Lijun Liu 1 , Hao Zhang 1 , Zhiqin Wang 1 , Jianchang Yang 1
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Phosphorus (P) deficiency is a limiting factor for sustainable rice (Oryza sativa L.) production. However, little is known about how rice varieties that differ in tolerance to low P perform under water-saving irrigation. In this study, we characterized the responses of two rice varieties, ZD88 that has a weak tolerance to low soil P and YJ2 that has a strong tolerance to low soil P to two irrigation regimes under both optimal P (NP, 46.9 mg/kg Olsen-P) and low P (LP, 6.8 mg/kg Olsen-P). The first irrigation regime involved continuous flooding (CF), while the second involved alternate wetting and moderate soil drying (AWD). The study was conducted in plants grown in pot over two years. YJ2 exhibited stronger tolerance to LP than ZD88 under both irrigation regimes. Compared to CF, plants grown with AWD produced higher grain yields and had increased phosphorus translocation efficiencies, as well as higher metabolic phosphorus efficiencies and increased phosphorus harvest index values. The water use efficiencies of the two rice varieties were increased under both NP and LP under AWD conditions. The AWD regime also resulted in higher shoot dry weights and increased photosynthesis rates under LP compared with CF. Moreover, the remobilization of non-structural carbohydrates from stems to the grain was also increased under the AWD regime, together with higher activities of sucrose-phosphate synthase, sucrose synthase and peroxidases and increased abscisic acid contents in grains. Root dry weights and root to shoot ratios were also increased under AWD conditions, together with increased root acid phosphatase activities. Taken together, these results demonstrate that the AWD regime benefits rice production under LP environment.
中文翻译：
水稻的干湿交替方式增强了对低磷的耐受性
磷 (P) 缺乏是可持续水稻 ( Oryza sativaL.) 生产。然而，人们对低磷耐受性不同的水稻品种在节水灌溉下的表现知之甚少。在这项研究中，我们描述了两种水稻品种，对低土壤磷具有弱耐受性的 ZD88 和对低土壤磷具有强耐受性的 YJ2 在两种最佳磷（NP，46.9 mg/kg Olsen -P) 和低 P (LP, 6.8 mg/kg Olsen-P)。第一个灌溉制度涉及连续洪水（CF），而第二个涉及交替润湿和适度土壤干燥（AWD）。该研究在盆栽植物中进行了两年多。在两种灌溉方式下，YJ2 对 LP 的耐受性比 ZD88 更强。与 CF 相比，用 AWD 种植的植物产生更高的谷物产量，并提高了磷转运效率，以及更高的代谢磷效率和增加的磷收获指数值。在 AWD 条件下，NP 和 LP 两种水稻品种的水分利用效率均有所提高。与 CF 相比，AWD 方案还导致 LP 下更高的芽干重和增加的光合作用速率。此外，在 AWD 方案下，非结构性碳水化合物从茎到籽粒的再动员也增加，蔗糖磷酸合酶、蔗糖合酶和过氧化物酶的活性更高，籽粒中脱落酸含量增加。在 AWD 条件下，根干重和根茎比也增加，同时根酸性磷酸酶活性增加。总之，这些结果表明 AWD 制度有利于 LP 环境下的水稻生产。
更新日期：2021-05-12
中文翻译：
水稻的干湿交替方式增强了对低磷的耐受性
磷 (P) 缺乏是可持续水稻 ( Oryza sativaL.) 生产。然而，人们对低磷耐受性不同的水稻品种在节水灌溉下的表现知之甚少。在这项研究中，我们描述了两种水稻品种，对低土壤磷具有弱耐受性的 ZD88 和对低土壤磷具有强耐受性的 YJ2 在两种最佳磷（NP，46.9 mg/kg Olsen -P) 和低 P (LP, 6.8 mg/kg Olsen-P)。第一个灌溉制度涉及连续洪水（CF），而第二个涉及交替润湿和适度土壤干燥（AWD）。该研究在盆栽植物中进行了两年多。在两种灌溉方式下，YJ2 对 LP 的耐受性比 ZD88 更强。与 CF 相比，用 AWD 种植的植物产生更高的谷物产量，并提高了磷转运效率，以及更高的代谢磷效率和增加的磷收获指数值。在 AWD 条件下，NP 和 LP 两种水稻品种的水分利用效率均有所提高。与 CF 相比，AWD 方案还导致 LP 下更高的芽干重和增加的光合作用速率。此外，在 AWD 方案下，非结构性碳水化合物从茎到籽粒的再动员也增加，蔗糖磷酸合酶、蔗糖合酶和过氧化物酶的活性更高，籽粒中脱落酸含量增加。在 AWD 条件下，根干重和根茎比也增加，同时根酸性磷酸酶活性增加。总之，这些结果表明 AWD 制度有利于 LP 环境下的水稻生产。
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