Neighbouring plants modify maize root foraging for phosphorus: coupling nutrients and neighbours for improved nutrient-use efficiency
Neighbouring plants modify maize root foraging for phosphorus: coupling nutrients and neighbours for improved nutrient-use efficiency
复制标题
邻近植物改变玉米根部对磷的觅食：将养分与邻近植物耦合以提高养分利用效率
DOI：
10.1111/nph.16206
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发表时间：
2020
期刊：
影响因子：
9.4
通讯作者：
Shen Jianbo
中科院分区：
文献类型：
--
作者：
Zhang Deshan;Lyu Yang;Li Hongbo;Tang Xiaoyan;Hu Ran;Rengel Zed;Zhang Fusuo;Whalley William R.;Davies William;Cahill James F. Jr.;Shen Jianbo
养分分布和邻居会影响植物生长，但邻居如何塑造根部获取养分的策略尚不清楚。在这里，我们探索了受邻居影响的植物觅食养分的新模式，以改善养分获取。在根箱实验中，玉米（Zea mays）单独种植（玉蜀黍），或与玉米（玉蜀黍/玉蜀黍）或蚕豆（Vicia faba）（玉米/蚕豆）作为一侧邻居，另一侧有或没有富含磷（P）的区域。玉米在玉米/玉米中表现出根回避，在根系生长减少“共享”土壤，并在远离邻国的地方增加增长。相反，玉米的根在邻近蚕豆根附近增殖，与玉米根相比，蚕豆根在根际具有更高的可用磷（由于柠檬酸盐和酸性磷酸酶渗出）。与玉米/蚕豆实验相比，在玉米/玉米中，玉米增殖了更多的根，但花费更少的时间到达并从远离邻居的 P 斑块中生长出来。玉米/蚕豆异质磷处理下的玉米地上部生物量和磷吸收量高于玉米/玉米系统。玉米根部的取食策略是养分和邻近植物异质分布的综合功能，从而改善养分获取和玉米生长。了解觅食模式对于优化作物养分管理至关重要。
Nutrient distribution and neighbours can impact plant growth, but how neighbours shape root‐foraging strategy for nutrients is unclear. Here, we explore new patterns of plant foraging for nutrients as affected by neighbours to improve nutrient acquisition.Maize (Zea mays) was grown alone (maize), or with maize (maize/maize) or faba bean (Vicia faba) (maize/faba bean) as a neighbour on one side and with or without a phosphorus (P)‐rich zone on the other in a rhizo‐box experiment.Maize demonstrated root avoidance in maize/maize, with reduced root growth in ‘shared’ soil, and increased growth away from its neighbours. Conversely, maize proliferated roots in the proximity of neighbouring faba bean roots that had greater P availability in the rhizosphere (as a result of citrate and acid phosphatase exudation) compared with maize roots. Maize proliferated more roots, but spent less time to reach, and grow out of, the P patches away from neighbours in the maize/maize than in the maize/faba bean experiment. Maize shoot biomass and P uptake were greater in the heterogeneous P treatment with maize/faba bean than with maize/maize system.The foraging strategy of maize roots is an integrated function of heterogeneous distribution of nutrients and neighbouring plants, thus improving nutrient acquisition and maize growth. Understanding the foraging patterns is critical for optimizing nutrient management in crops.