| 冯敬涛,刘照霞,徐新翔,于天武,葛顺峰,姜远茂.海藻提取物对干旱胁迫下苹果砧木幼苗抗旱性和养分吸收的影响[J].干旱地区农业研究,2020,38(5):79~85 |
| 海藻提取物对干旱胁迫下苹果砧木幼苗抗旱性和养分吸收的影响 |
| Effects of seaweed extract on drought resistance and nutrient absorption of apple rootstock seedlings under drought stress |
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| DOI：10.7606/j.issn.1000-7601.2020.05.12 |
| 中文关键词: 苹果砧木幼苗 干旱胁迫 海藻提取物 叶面喷施 抗旱生理 氮、磷、钾含量 |
| 英文关键词:apple rootstock seedlings drought stress seaweed extract foliar spraying drought resistance physiology nitrogen, phosphorus, and potassium contents |
| 基金项目:国家重点研发计划项目(2016YFD0201100)；国家自然科学基金(31501713)；国家现代农业产业技术体系建设资金(CARS-27); 山东省泰山学者工程专项（2018） |
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| 中文摘要: |
| 以1 a生苹果砧木M9T337幼苗为试材，设置正常供水（CK）、中度干旱（MD）、中度干旱+海藻提取物（MD+SE）、重度干旱（SD）、重度干旱+海藻提取物（SD+SE）5个处理，研究海藻提取物对不同程度干旱胁迫下幼苗的生物量、光合特性、抗氧化酶活性、渗透调节物质含量和植株养分含量的影响。结果表明：在中度干旱胁迫条件下，植株总生物量较MD处理提高了15.4%，净光合速率较MD处理提高了12.1%，SOD、POD、CAT和APX活性分别较MD处理提高了4.5%、8.4%、30.6%、9.8%，可溶性蛋白和脯氨酸等渗透调节物质较MD处理分别提高了19.1%和13.1%，植株氮、磷、钾含量较MD处理分别提高了19.2%、22.7%和40.5%；在重度干旱胁迫下，叶面喷施海藻提取物后总生物量较SD处理提高了13.7%，净光合速率较SD处理提高了10.2%，SOD、POD、CAT和APX活性较SD处理分别提高了16.6%、18.1%、30.2%、8.9%，可溶性蛋白和脯氨酸等渗透调节物质含量较SD处理分别提高了14.1%和13.1%，植株氮、磷、钾含量较SD处理分别提高了12.4%、21.7%和38.4%。不同程度干旱条件下喷施海藻提取物均有良好的缓解效果，以中度干旱胁迫缓解效果更显著。 |
| 英文摘要: |
| This experiment used annual apple rootstock M9T337 seedlings as the test material and five treatments including normal water supply (CK), moderate drought (MD), moderate drought + seaweed extract (MD+SE), severe drought (SD), and severe drought + seaweed extract (SD+SE) to study the changes in biomass, photosynthetic characteristics, antioxidant enzyme activity, osmotic adjustment substance content, and plant nutrient contents of the seedlings impacted by seaweed extracts. The results showed that, under moderate drought stress,the total plant biomass increased by 15.4% and the net photosynthetic rate increased by 12.1% compared with that of MD treatment. The activities of SOD, POD, CAT, and APX increased by 4.5%, 8.4%, 30.6%, and 9.8%,respectively. Osmotic regulation substances such as soluble protein and proline increased by 19.1% and 13.1% compared to that of MD treatment. The nitrogen, phosphorus, and potassium contents of plants increased by 19.2%, 22.7%, and 40.5%, respectively, compared to that of MD treatment. Under severe drought stress, the total biomass after foliar spraying seaweed extracts increased by 13.7% compared to that of SD treatment, the net photosynthetic rate increased by 10.2% compared to that of SD treatment, and the activities of SOD, POD, CAT, and APX compared to SD increased by 16.6%, 18.1%, 30.2%, and 8.9%, respectively. Soluble protein and proline and other osmotic regulation substances increased by 14.1% and 13.1% compared to that of SD treatment, respectively.Plant nitrogen, phosphorus, and potassium contents increased by 12.4%, 21.7%, and 38.4%, respectively, compared to that of SD treatment. Under different degrees of drought conditions, seaweed extracts spray had good relief effect, and the relief effect on moderate drought stress was more significant. |
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