| 朱珊珊,米俊珍,赵宝平,孙梦媛,李英浩,刘景辉.腐植酸对干旱胁迫下燕麦叶片碳同化酶活性及产量的影响[J].麦类作物学报,2021,(6):722 |
| 腐植酸对干旱胁迫下燕麦叶片碳同化酶活性及产量的影响 |
| Effect of Humic Acid on Carbon Assimilation Enzymes Activity in Leaves and Oat Yield under Drought Stress |
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| DOI：10.7606/j.issn.1009-1041.2021.06.10 |
| 中文关键词: 干旱胁迫 腐植酸 燕麦叶片 碳同化酶 产量 |
| 英文关键词:Drought stress Humic acid Oat leaf Carbon assimilation enzyme Yield |
| 基金项目:内蒙古自治区科技计划项目(201802062）；内蒙古自治区科技成果转化项目(2019CG017）；国家燕麦荞麦产业技术体系项目（CARS-07-B-4）；燕麦抗逆种质资源创新及抗逆栽培生理调控(2018YFE0107900)；内蒙古自治区研究生科研创新资助项目（DC2000000378） |
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| 中文摘要: |
| 为明确腐植酸对干旱胁迫下燕麦叶片碳同化酶活性和产量的影响，以燕麦品种燕科2号为试验材料，采用盆栽方式，分别在正常供水（田间最大持水量75%）、中度和重度干旱胁迫（分别为田间最大持水量45%和30%）3个水分条件下喷施腐植酸（HA）和等量清水（CK），分析了不同处理下燕麦叶片中碳同化酶活性、干物质积累量和籽粒产量。结果表明，干旱胁迫导致燕麦叶片中核酮糖-1，5-二磷酸羧化酶（Rubisco）、磷酸烯醇式丙酮酸羧化酶（PEPC）和甘油醛-3-磷酸脱氢酶(GAPD)活性显著降低，地上部干物质积累量和产量下降，乙醇酸氧化酶（GO）活性显著增加，以田间最大持水量为30%处理的变化更为明显。干旱胁迫下，喷施腐植酸能显著提高燕麦叶片中Rubisco、PEPC和GAPD活性，降低GO活性，显著增加燕麦的千粒重、穗粒重和产量，在田间最大持水量为30%时效果最优，其中喷施腐植酸处理的Rubisco、PEPC和GAPD活性较CK分别提高19.17%～34.41%、21.43%～38.24%、19.85%～39.59%，GO活性较CK降低13.64%～ 18.39%，地上部干物质积累量和产量较CK分别增加2.09%～16.56%和8.46%～10.26%。综上所述，干旱胁迫条件下，喷施腐植酸可增强燕麦叶片的光合碳同化酶活性，促进干物质积累，增加籽粒产量。 |
| 英文摘要: |
| In order to clarify the effect of humic acid on the activity of carbon assimilation enzyme in leaves and oat yield under severe drought stress, an oat variety Yanke 2 was used in a pot experiment. The treatments consisted of spraying of humic acid(HA) or water(CK) with three water levels:normal water supply(75% of the maximum field capacity), moderate and severe drought stress(45% and 30% of the maximum field capacity), respectively. The activities of carbon assimilation enzymes, dry matter accumulation and grain yield of oats under different treatments were analyzed. The results showed that drought stress significantly reduced the activities of ribulose-1,5-bisphosphate carboxylase(Rubisco), phosphoenolpyruvate carboxylase(PEPC) and glyceraldehyde-3-phosphate dehydrogenase(GAPD) in oat leaves, decreased the dry matter accumulation and yield of above-ground parts, and significantly increased the activity of glycolate oxidase(GO), especially when the maximum field water capacity was 30%. Under drought stress, spraying humic acid significantly increased the activities of Rubisco, PEPC and GAPD in oat leaves, reduced the activity of GO, and significantly increased the 1 000-grain weight, spike grain weight and oat yield of oat, and the effect was optimal when the maximum field water capacity was 30%. The activities of Rubisco, PEPC and GAPD were increased by 19.17%-34.41%, 21.43%-38.24% and 19.85%-39.59%, respectively, and that of GO was decreased by 13.64%-18.39%, compared with those of CK, and the above ground dry matter accumulation and yield were increased by 2.09%-16.56% and 8.46%-10.26%, respectively. In conclusion, under drought stress, spraying humic acid can improve the activities of photosynthetic carbon assimilation enzymes in oat leaves, promote dry matter accumulation and increase grain yield. |
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