Sufficient nitrogen promoted high phosphorus tolerance and phosphorus-accumulating capability of Polygonum hydropiper in relation to changes of phytohormones and phenols
Sufficient nitrogen promoted high phosphorus tolerance and phosphorus-accumulating capability of Polygonum hydropiper in relation to changes of phytohormones and phenols
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DOI：
10.1016/j.chemosphere.2021.130318
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发表时间：
2021-04-05
期刊：
影响因子：
8.8
通讯作者：
Li，Tingxuan
中科院分区：
文献类型：
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作者：
Ye，Daihua;Shen，Qiwei;Li，Tingxuan
施氮 (N) 可有效提高磷积累植物的磷 (P) 植物提取效率。然而，关于不同施氮量的高磷培养基中积磷植物的生长、磷吸收和生理变化的信息很少，且生长或磷吸收的改善是否与植物激素和酚类物质的变化有关。本研究调查了水蓼高磷培养基（400 mg L−1）、充足氮（SN，50 mg L−1）和低氮（LN，12.5 mg L−1）供应的采矿生态型（ME）和非采矿生态型（NME）的生长、磷积累能力、植物激素和酚类。 SN的供给大大增加了组织生物量、P的积累能力。 水胡椒素高磷培养基中，ME 比 NME 表现出更高的磷生物富集系数和组织磷积累。 5周时发现最大的组织生物量和磷积累。 5周时，SN供应大大降低了P.组织中吲哚-3-乙酸（IAA）、玉米素、脱落酸（ABA）、总酚和类黄酮的浓度。 Hydropiper，与液氮供应相比。在供氮的高磷培养基中，与 NME 相比，ME 在叶和茎中产生的 IAA、玉米素、ABA、总酚和类黄酮浓度较低。 IAA、玉米素、ABA、类黄酮浓度与生物量以及叶片中磷积累量之间存在显着负相关。因此，SN的供应促进了ME的高磷耐受性和磷积累能力，将植物激素和酚类调节到合适的浓度，最终提高了植物提取磷的能力。
Nitrogen (N) application is efficient to enhance phosphorus (P)-phytoextraction efficiency of P-accumulating plants. However, there is little available information on growth, P uptake and physiological changes of P-accumulating plants in high P media with different N application, and that whether the improved growth or P uptake is related with changes of phytohormones and phenols. This study investigated growth, P-accumulating capability, phytohormones and phenols of a mining ecotype (ME) and a non-mining ecotype (NME) ofPolygonum hydropiperin high P media (400 mg L−1) with sufficient N (SN, 50 mg L−1) and low N (LN, 12.5 mg L−1) supply. SN supply greatly increased tissue biomass, P-accumulating capability ofP. hydropiperin high P media, and the ME showed higher P bioaccumulation coefficient, and tissue P accumulation than the NME. The greatest tissue biomass and P accumulation was found at 5 weeks. At 5 weeks, SN supply greatly decreased concentrations of indole-3-acetic acid (IAA), zeatin, abscisic acid (ABA), total phenolic and flavonoid in tissues ofP. hydropiper, compared with LN supply. The ME produced lower concentrations of IAA, zeatin, ABA, total phenolic and flavonoid than the NME in leaf and stem in high P media with N supply. Significantly negative correlations were found between IAA, zeatin, ABA, flavonoid concentrations and biomass as well as P accumulation in leaf. Thus, SN supply promoted high P tolerance and P-accumulating capability of the ME in relation to modulating phytohormones and phenols to suitable concentrations, ultimately improving P-phytoextraction ability.