| 半夏连作障碍效应及生理机制研究 |
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| 引用本文： | 安 艳,杨 丹,李 鑫,晋小军.半夏连作障碍效应及生理机制研究[J].西北农业学报,2018,27(7):1017-1022. |
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| 作者姓名： | 安 艳 杨 丹 李 鑫 晋小军 |
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| 作者单位： | 甘肃农业大学农学院甘肃省中药材规范化生产技术创新重点实验室 |
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| 基金项目： | 甘肃主产大宗药材规范化栽培技术研究（035070003）。 |
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| 摘 要： | 通过比较轮作和连作半夏的生理生化效应,探讨连作对半夏生长发育的影响。试验测定并分析半夏的生长指标、叶片叶绿素质量分数、植株保护酶活性、MDA质量摩尔浓度及渗透调节物质质量分数的变化。结果表明,连作导致半夏生长发育受阻,其中连作较轮作年平均株高、块茎直径、地上部分生物量及地下部分生物量分别降低31.93%、19.86%、56.30%和38.32%;叶片叶绿素、叶绿素a、叶绿素b和类胡萝卜素质量分数均降低,叶绿素a/b增大;叶片保护酶SOD、POD和CAT活性降低;叶片膜脂过氧化作用增强,MDA质量摩尔浓度、脯氨酸、可溶性糖和可溶性蛋白质量分数增加。可见,连作通过降低植株保护酶活性引起活性氧代谢失调,导致活性氧积累和膜脂过氧化损伤。这种影响的表现为植株生长发育受到抑制,光合色素质量分数降低,可溶性糖和可溶性蛋白质量分数升高。
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| 关 键 词： | 半夏 连作障碍 叶绿素 活性氧代谢 保护酶活性 |
Study on the Effect and Physiological Mechanism of Continuous Cropping Obstruction of Pinellia ternata |
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| AN Yan,YANG Dan,LI Xin and JIN Xiaojun.Study on the Effect and Physiological Mechanism of Continuous Cropping Obstruction of Pinellia ternata[J].Acta Agriculturae Boreali-occidentalis Sinica,2018,27(7):1017-1022. |
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| Authors: | AN Yan YANG Dan LI Xin and JIN Xiaojun |
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| Abstract: | To explore the effects of continuous cropping on the growth and development of Pinellia ternata,the growth indexes, leaf chlorophyll mass fraction, plant protective enzyme activity, MDA and osmotic adjustment substance content of Pinellia ternata were determined. The results showed that the continuous cropping blocked the growth and development of Pinellia ternata. The means of plant height, tubers diameter, aboveground biomass and underground biomass in continuous cropping were 31.93%,19.86%,56.30% and 38.32% lower than in rotation cropping, respectively; the mass fractions of leaf chlorophyll, chlorophyll a, chlorophyll b and carotenoid decreased, chlorophyll a/b increased; the activities of leaf protective enzyme SOD, POD and CAT decreased;leaf membrane lipid peroxidation increased, MDA, proline, soluble sugar and soluble protein mass fraction increased. In conclusion, the continuous cropping cause disorder of active oxygen metabolism by reducing the plant protective enzyme activity, leading to active oxygen accumulation and membrane lipid peroxidation damage. The manifestation of this effect is to inhibit the growth and development of plant, decreasing the mass fraction of photosynthetic pigment, and increasing the content of soluble sugar and soluble protein. |
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| Keywords: | Pinellia ternata Continuous cropping obstacle Chlorophyll Active oxygen metabolism Protective enzyme activities |
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