纳米碳对玉米种子萌发及根系形态的影响

Effects of Nano-carbon on Germination and Root Morphology of Maize Seeds

为了探究纳米碳对作物生长的影响,以玉米品种——‘东农253’为试材,设置不同浓度梯度的纳米碳,采用培养皿滤纸法和琼脂培养法,研究纳米碳对玉米种子萌发和根系形态的影响。结果表明,在萌发试验中,随着纳米碳浓度的增大,玉米种子的萌发率逐渐增大,在种子吸涨36～60h时与对照处理差异显著,其吸水率、胚根、胚芽鲜重及平均胚根、胚芽长度均逐渐增大,并在66mg/L时达到最大值,分别比对照增加11.89%、20.53%、13.90%、19.62%、20.85%,高于此浓度则呈现抑制现象;在对玉米根系形态的观察试验中,随着纳米碳浓度的增大,植株鲜重、根系鲜重、主胚根长、单位主胚根上侧根数量均显著增加,分别高于对照8.39%、9.24%、24.14%、10.59%。因此,在一定浓度范围内,纳米碳可促进种子的萌发及根系的生长。

In order to explore the effect of Nano-carbon on crop growth, petri dish using test paper and agar culture were adopted and different concentration gradient of nano-carbon were conducted to study the effects of nano-earbon on germination and root morphology of maize （Zea mays L. cv. ＇ East agriculture 253＇） seeds. The results showed that germination rate increased and had significant differences with control in 36-60 h of maize seeds imbibition. The water absorption percentage, radicle and germ fresh weight, average radicle and germ length all increased gradually with the nano-carbon concentration increasing in germination experiment. In 66 mg/L treatments, all indexes reached maximum, which were higher 11.89%, 20.53%, 13.90%, 19.62%, 20.85% than control respectively, when the concentration was higher than 66 rag/L, it were inhibited. In the maize root morphology experiment, the plant fresh weight, root fresh weight, primary seminal root length, LR number of primary seminal root were significantly increased with the nano-carbon concentration increasing, which were higher than control by 8.39%, 9.24%, 24.14%, 10.59%. It suggested that nano-carbon could promote seed germination and root growth in the certain concentration.