Little information is available on the interaction of CuO nanoparticles (nCuO) with tuberous roots. In this study, Beauregard-14 (B-14, low lignin) and Covington (COV, high lignin) sweetpotato varieties were cultivated until maturity in soil amended with nCuO, bulk copper oxide (bCuO) and CuCl2 at 25-125 mg/kg. The Cu treatments had no significant influence on chlorophyll content. Gas exchange parameters were not affected in B-14. In COV, however, at 125 mg/kg treatments, bCuO reduced the intercellular CO2 (11%), while CuCl2 increased it by 7%, compared with control (p ≤ 0.035). At 25 mg/kg nCuO increased the length of COV roots (20.7 ± 2.0 cm vs. 14.6 ± 0.8 cm, p ≤ 0.05). In periderm of B-14, nCuO, at 125 mg/kg, increased Mg by 232%, while the equivalent concentration of CuCl2 reduced P by 410%, compared with control (p ≤ 0.05). The data suggest the potential application of nCuO as nanofertilizer for sweetpotato storage root production.

译文

:关于CuO纳米颗粒(nCuO)与块根的相互作用的信息很少。在这项研究中,培育了Beauregard-14(B-14,低木质素)和Covington(COV,高木质素)甘薯品种,直到在土壤中用nCuO,块状氧化铜(bCuO)和CuCl2修正的成熟度为25-125 mg / kg 。铜处理对叶绿素含量无显着影响。气体交换参数在B-14中不受影响。然而,在COV中,以125 mg / kg的剂量处理,与对照相比,bCuO减少了细胞间CO2(11%),而CuCl2则增加了7%(p≤0.035)。在25 mg / kg nCuO下,COV根的长度增加了(20.7±2.0 cm对14.6±0.8 cm,p≤0.05)。与对照相比,在B-14的外皮中,nCuO在125 mg / kg时使Mg增加232%,而当量的CuCl2则使P减少410%(p≤0.05)。数据表明,nCuO作为甘薯贮藏根生产的纳米肥料的潜在应用。

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