Humic Acids Interfere with Nutrient Sensing in Plants Owing to the Differential Expression of TOR
Humic Acids Interfere with Nutrient Sensing in Plants Owing to the Differential Expression of TOR
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DOI：
10.1007/s00344-018-9835-6
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发表时间：
2019-03-01
影响因子：
4.8
通讯作者：
Olivares, Fabio L.
中科院分区：
文献类型：
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作者：
Canellas, Luciano P.;Canellas, Natalia O. A.;Olivares, Fabio L.
工业化农业的环境后果日益引起人们对新的生物技术的注意。基于腐殖物质的生物刺激剂的使用每年增长约10%，由于其对离子吸收的众所周知的作用，允许营养经济。然而，显着的植物响应腐殖酸已被观察到在中度胁迫条件下。腐殖酸对植物调节的影响尚不清楚。植物需要根据环境条件不断调整其生长，将营养和能量的可用性与生长因子相结合是细胞生长和分裂的关键。雷帕霉素的靶点是一种保守的激酶，它调节细胞的生长和代谢，以响应正常的营养条件和其他环境因素。在这里，我们报告说，低浓度的腐殖酸在水介质中改变了雷帕霉素的目标的表达，修改玉米幼苗的营养传感。雷帕霉素靶点的差异表达与地上部或根组织中的代谢物水平（氨基酸、糖或有机酸）之间没有直接关系。腐殖物质干扰了植物细胞对营养状态的感知，改变了参与营养感受的信号通路。
The environmental consequences of industrial agriculture have increasingly called attention to new biotechnologies. The use of biostimulants based on humic substances has grown by about 10% per year allowing for nutrient economy due to their well-known effect on ion uptake. However, significant plant responses to humic acids have been observed under moderate-stress conditions. The effect of humic acids on plant regulation remains unclear. Plants need to constantly adjust their growth according to environmental conditions and coupling the availability of nutrients and energy with growth factors is the key to cell growth and division. The target of rapamycin is a conserved kinase that regulates cell growth and metabolism in response to normal nutritional conditions and other environmental cues. Here, we report that low concentrations of humic acids in the aqueous medium changed the expression of the target of rapamycin, modifying nutrient sensing in maize seedlings. No direct relationships were found among the differential expression of the target of rapamycin and metabolites levels (amino acids, sugars, or organic acids) in shoot or root tissues. The humic substances disturb the perception of cell nutrient status and changes the signaling pathway involved in nutrient sensing in plants.