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当前位置: 首页 > 文章 > 根施5-氨基乙酰丙酸对亚适宜温光下黄瓜幼苗生长的影响 核农学报 2019 (1) 148-157
Position: Home > Articles > Effect of Root-application of 5-Aminolevulinic Acid on Growth of Cucumber Seedlings Under Suboptimal Temperature and Light Condition Journal of Nuclear Agricultural Sciences 2019 (1) 148-157

根施5-氨基乙酰丙酸对亚适宜温光下黄瓜幼苗生长的影响

作  者：
董荣荣;邓娇燕;郭佳;于贤昌;贺超兴;李衍素
单  位：
中国农业科学院蔬菜花卉研究所
关键词：
黄瓜;5-氨基乙酰丙酸(ALA);亚适宜温光;抗氧化酶活性;光合作用
摘  要：
为缓解亚适宜温光环境对黄瓜幼苗生长产生的不利影响,以中农26号为试验材料,研究亚适宜温光下根施不同浓度5-氨基乙酰丙酸(ALA)对黄瓜幼苗生长和生理特性的影响。结果表明,亚适宜温光下,根施5 mg·L~(-1) ALA可以显著提高黄瓜幼苗的全株干重、壮苗指数和根系活力,与对照相比,黄瓜幼苗全株干重和壮苗指数分别提高了32.5%和47.1%,根系活力提高了95.0%。根施5 mg·L~(-1) ALA能够显著增加幼苗叶片叶绿素和ALA含量,与对照相比,总叶绿素和ALA的含量分别提高了49.5%和55.7%。根施5 mg·L~(-1) ALA黄瓜幼苗的净光合速率(Pn)和气孔导度(Gs)分别较对照提高了22.9%和42.2%。根施5 mg·L~(-1)ALA后,抗氧化酶活性显著提高,叶片和根系的丙二醛(MDA)含量分别比对照降低了35.3%和18.1%。同时,根施适宜浓度的ALA对矿质元素的吸收和运输产生有一定影响,但对叶绿素合成过程中相关基因的表达无明显调控作用。本研究为缓解黄瓜幼苗亚适宜温光伤害提供了新方法,也为ALA在设施农业上的应用提供了技术支持。
译  名：
Effect of Root-application of 5-Aminolevulinic Acid on Growth of Cucumber Seedlings Under Suboptimal Temperature and Light Condition
作  者：
DONG Rongrong;DENG Jiaoyan;GUO Jia;YU Xianchang;HE Chaoxing;LI Yansu;Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences;
单  位：
DONG Rongrong%DENG Jiaoyan%GUO Jia%YU Xianchang%HE Chaoxing%LI Yansu%Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences
关键词：
cucumber;;5-aminolevulinic acid(ALA);;suboptimum temperature and light intensity;;autioxidant enzyme activities;;photosynthesis
摘  要：
In order to alleviate the adverse effects of suboptimal temperature and light intensity on the growth of cucumber seedlings, cucumber(cv. Zhongnong 26) was used as test material to carry out the effects of different concentrations of exogenous ALA on growth and physiological characteristics of cucumber seedlings under suboptimal temperature and light intensity. The results showed that root application 5 mg·L~(-1) exogenous ALA could significantly increase the dry mass, vigorous seedling index and root activity under suboptimal temperature and light compared with the control. The dry mass of whole plant and vigorous seedling index of cucumber seedlings were significantly increased by 32.5% and 47.1%, respectively, and the root activity were significantly increased by 95.0% and the contents of total chlorophyll and ALA in leaves of seedlings were increased by 49.5% and 55.7%, respectively. Moreover, the net photosynthetic rate and stomatal conductance of cucumber seedlings increased by 22.9% and 42.2%, respectively, compared with the control. In addition, after treated with 5 mg·L~(-1) ALA, the activities of antioxidant enzymes were significantly increased, and the content of malondialdehyde(MDA) in leaf and roots decreased by 35.3% and 18.1%, respectively. Root application of ALA can regulate absorption and transport regulation of mineral elements, but there was no obvious regulation on the expression of related genes in chlorophyll synthesis. The results of this study provide a new method for alleviating the injury of cucumber seedlings under suboptimal temperature and light intensity, and offer technical support for ALA application in facility agriculture.

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