外源赤霉素对汉麻生长、光合特性及生理指标的影响

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中文摘要：为探究适宜汉麻生长发育的外源赤霉素浓度,以纤维用汉麻品种火麻一号为试验材料,15个盆栽为1个处理,种植盆栽35 d后,喷施1次不同浓度[CK(0 mg/mL)、G1(25 mg/mL)、G2(50 mg/mL)、G3(75 mg/mL)、G4(100 mg/mL)]的外源赤霉素,测定喷施后汉麻的株高、茎粗等生长指标,净光合速率(Pn)等光合特性,超氧化物歧化酶(SOD)等抗氧化指标,以及蛋白和可溶性糖含量.结果表明,G2处理对汉麻生长指标的促进效果最佳,雌株株高、茎粗、工艺长度较CK分别增加 26.98%、16.94%、43.40%,雄株株高、茎粗、工艺长度较CK增加14.31%、20.53%、20.69%,原茎和干茎单株重较CK增加37.76%、37.92%;光合特性方面,G2处理下Pn、蒸腾速率(Tr)、气孔导度(Gs)、SPAD值的数值较高,较CK增加60.06%、58.49%、40.39%、15.51%,胞间CO2浓度(Ci)较CK减少20.22%;抗氧化指标方面,G3处理汉麻的SOD活性最高,较CK增加69.98%,G2处理汉麻的过氧化物酶、过氧化氢酶活性和脯氨酸最高,较CK增加100%、45.38%、84.02%,G2处理汉麻的超氧阴离子(O2-)和丙二醛(MDA)含量最低,较CK减少68.04%、46.88%;G2处理汉麻的蛋白和可溶性糖含量较高,较CK增加76.86%、66.88%.综上,外源喷施赤霉素可促进汉麻植株生长,提高其叶片的光合指标和叶绿素含量,增加抗氧化酶活性,以延缓衰老,提高抗性,同时提高叶片的蛋白及可溶性糖含量,以G2(50 mg/mL)处理效果较佳.

外文标题：Effects of exogenous gibberellin on growth,photosynthetic characteristics and physiological indexes of hemp

外文摘要：To investigate the optimal concentration of exogenous gibberellin for the growth and development of hemp,fiber hemp variety'Huoma No.1'was used as the experimental material.15 potted plants were set as one treatment.At 35 days after planting,different concentrations of exogenous gibberellin were applied once:[CK(0 mg/mL),G1(25 mg/mL),G2(50 mg/mL),G3(75 mg/mL),G4(100 mg/mL)].Measurements included growth parameters such as plant height and stem diameter,photosynthetic characteristics such as net photosynthetic rate(Pn),antioxidant indicators such as superoxide dismutase(SOD),as well as protein and soluble sugar content.The results showed that the G2 treatment had the most significant promoting effect on hemp growth.Compared with CK,the female plants exhibited increases of 26.98%,16.94%,and 43.40%in plant height,stem diameter,and technical length,respectively,while the male plants showed increases of 14.31%,20.53%,and 20.69%in the same parameters.The fresh stem and dry stem weights per plant increased by 37.76%and 37.92%,respectively,compared with CK.In terms of photosynthetic characteristics,the G2 treatment resulted in higher values of Pn,transpiration rate(Tr),stomatal conductance(Gs),and SPAD,increasing by 60.06%,58.49%,40.39%,and 15.51%,respectively,compared with CK,while the intercellular CO2 concentration(Ci)decreased by 20.22%.Regarding antioxidant indicators,the G3 treatment showed the highest SOD activity,increasing by 69.98%compared with CK.The G2 treatment exhibited the highest peroxidase(POD)and catalase(CAT)activities and proline content,increasing by 100%,45.38%,and 84.02%,respectively,compared with CK.Additionally,the G2 treatment had the lowest superoxide anion(O ₂ ⁻)and malondialdehyde(MDA)content,decreasing by 68.04%and 46.88%,respectively,compared with CK.The G2 treatment also led to higher protein and soluble sugar content,increasing by 76.86%and 66.88%,respectively,compared with CK.In conclusion,exogenous gibberellin application promotes hemp growth,enhances photosynthetic efficiency and chlorophyll content,increases antioxidant enzyme activity(delaying senescence and improving stress resistance),and elevates protein and soluble sugar content,the G2 treatment(50 mg/mL)showed optimal effects.

外文关键词：

hempexogenous gibberellingrowth indexphysiological index

作者：

李学海、边境、曹焜、王晓楠、张晓艳、高宇

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作者单位：

黑龙江省科学院大庆分院,黑龙江大庆 163319

关键词：

汉麻外源赤霉素生长指标生理特性

出版年：

2025

DOI：