Fine Root Patterning and Balanced Inorganic Phosphorus Distribution in the Soil Indicate Distinctive Adaptation of Maize Plants to Phosphorus Deficiency

ZHANG Yu; YU Peng; PENG Yun-Feng; LI Xue-Xian; CHEN Fan-Jun; LI Chun-Jian

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Fine Root Patterning and Balanced Inorganic Phosphorus Distribution in the Soil Indicate Distinctive Adaptation of Maize Plants to Phosphorus Deficiency

机译：土壤中的细根模式和无机磷平衡分布表明玉米植物对缺磷的适应性强

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Plants have diverse strategies to cope with phosphorus (P) deficiency.To better understand how maize responds to P deficiency,a field experiment with two P levels,0 and 100 kg P2O5 ha-1 (P0 and P100,respectively),was carried out as a part of a long-term Pfertilizer field trial.Plant and soil analyses showed that P-deficient maize reduced its growth rate,increased P use efficiency,and formed more thin roots with the diameter less than 0.6 mm at jointing and silking stages,compared to the plants treated with P100.Further,there were no differences in major inorganic P fractions (Ca2-P,Ca8-P,A1-P,Fe-P,occluded P and Ca10-P) between the rhizospheric and bulk soils at each harvest,even when soil Olsen-P was only 1.38 mg kg-1.These results suggested that maize responded to P deficiency by reducing the internal P demand for growth and increasing P acquisition ability by favorable root morphological alteration at low carbon cost.

机译：植物对付磷缺乏的策略多种多样。为了更好地了解玉米对磷缺乏的反应，进行了两种磷水平的田间试验，分别为0和100 kg P2O5 ha-1（分别为P0和P100）植物和土壤分析表明，缺磷玉米降低了生长速度，提高了磷的利用效率，在拔节和丝化阶段形成了直径小于0.6 mm的细根，与P100处理的植物相比，根际土壤和散装土壤中主要的无机P组分（Ca2-P，Ca8-P，A1-P，Fe-P，闭塞的P和Ca10-P）没有差异。即使在土壤Olsen-P仅为1.38 mg kg-1的情况下，每次收获也是如此。这些结果表明，玉米通过降低低磷的内部形态需求和增加根系形态变化来增加磷的吸收能力，从而解决了磷缺乏的问题。

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《土壤圈（英文版）》 |2012年第6期|870-877|共8页
作者
ZHANG Yu; YU Peng; PENG Yun-Feng; LI Xue-Xian; CHEN Fan-Jun; LI Chun-Jian;
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作者单位

Key Laboratory of Plant-Soil Interactions, Ministry of Education, Department of Plant Nutrition, China Agricultural University,Beijing 100193(China);

Key Laboratory of Plant-Soil Interactions, Ministry of Education, Department of Plant Nutrition, China Agricultural University,Beijing 100193(China);

Key Laboratory of Plant-Soil Interactions, Ministry of Education, Department of Plant Nutrition, China Agricultural University,Beijing 100193(China);

Key Laboratory of Plant-Soil Interactions, Ministry of Education, Department of Plant Nutrition, China Agricultural University,Beijing 100193(China);

Key Laboratory of Plant-Soil Interactions, Ministry of Education, Department of Plant Nutrition, China Agricultural University,Beijing 100193(China);

Key Laboratory of Plant-Soil Interactions, Ministry of Education, Department of Plant Nutrition, China Agricultural University,Beijing 100193(China);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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Fine Root Patterning and Balanced Inorganic Phosphorus Distribution in the Soil Indicate Distinctive Adaptation of Maize Plants to Phosphorus Deficiency

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