| 杨伟,张国斌,肖雪梅,周德霞,郁继华.水杨酸对不同灌水下限青花菜根系生长、根冠比及叶片抗氧化酶活性的影响[J].干旱地区农业研究,2015,33(3):148~152 |
| 水杨酸对不同灌水下限青花菜根系生长、根冠比及叶片抗氧化酶活性的影响 |
| Effects of SA on root growth, root-shoot ratio, and antioxidant activity of leaf enzymes in broccoli under different lower limits of irrigation |
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| DOI：10.7606/j.issn.1000-7601.2015.03.24 |
| 中文关键词: 水杨酸 灌水下限 青花菜 根系 酶活性 |
| 英文关键词:salicylic acid irrigation limit broccoli roots activity |
| 基金项目:国家现代农业产业技术体系建设资金项目（CARS-25-C-07）；国家自然科学基金项目（31260473） |
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| 中文摘要: |
| 以青花菜为试材，采用大田和室内分析相结合的试验方法，研究了0.15 mmol·L-1的水杨酸（SA）对不同灌水下限（相对含水量75%，60%和45%）青花菜根系生长及叶片抗氧化特性的影响。结果表明：(1) 随着灌水下限的降低，青花菜主根长、根干鲜重及过氧化氢酶（CAT）活性先升高后降低，根冠比、过氧化氢（H2O2）含量、超氧化物歧化酶（SOD）、过氧化物酶（POD）及抗坏血酸过氧化物酶（APX）活性逐渐升高。(2) SA处理改善了青花菜根系生长特性，降低根冠比，提高结球期抗氧化酶活性，其中60%灌水下限经SA处理后，根系及酶活性指标均与75%灌水下限保持相当水平。由此可知：以相对含水量60%作为灌水下限并配合0.15 mmol·L-1 SA处理可以为青花菜高效节水灌溉提供理论支撑。 |
| 英文摘要: |
| In this research, broccoli was employed as the experimental material by combining field and laboratory analyses to have studied the effects of 0.15 mmol·L-1 salicylic acid (SA) under different irrigation limits (relative water contents of 75%, 60% and 45%, respectively) on the root system growth and leaf antioxidant characteristics. The results showed that with the decrease of lower limit of irrigation, broccoli root length, root fresh and dry weight and catalase (CAT) activity became increased and then went decreased, while shoot ratio, hydrogen peroxide (H2O2) content, activities of super-superoxide dismutase (SOD), peroxidase (POD) and ascorbate peroxidase (APX) all gradually became increased. In addition, SA treatment improved root growth characteristics of broccoli, reducing shoot ratio and enhancing the antioxidant enzyme activity of cabbage. It was further discovered that the root growth and antioxidant activity by the 60% limit of irrigation after SA treatment reached similar levels to those by the 75% lower limit of irrigation. It could be concluded that the relative water content of 60% as a lower limit and irrigation approach with 0.15 mmol·L-1 SA treatment could provide theoretical support for the efficient water-saving irrigation on broccoli. |
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