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以切花菊品种‘寒白’为试材,研究了不同质量浓度(0、25、50、100和200 mg·L-1)5-氨基乙酰丙酸(ALA)叶面喷施处理对低温胁迫下菊花光合指标及叶片超氧化物歧化酶(SOD)活性,相对电导率,及叶绿素、丙二醛、可溶性糖和可溶性蛋白含量的影响。结果表明:ALA能显著降低叶片相对电导率和丙二醛含量,提高叶片叶绿素、可溶性糖、可溶性蛋白含量和SOD活性,叶片净光合速率、气孔导度和蒸腾速率也显著提高,且50 mg·L-1ALA叶面喷施处理对提高切花菊抗寒性相对效果最佳。
Chrysanthemum chrysanthemum was used as experimental material to study the effects of foliar spraying with different concentrations (0, 25, 50, 100 and 200 mg · L-1) of 5-aminolevulinic acid Under chrysanthemum photosynthesis and leaf superoxide dismutase (SOD) activity, relative conductivity and chlorophyll, malondialdehyde, soluble sugar and soluble protein content. The results showed that: ALA could significantly reduce relative leaf electric conductivity and MDA content, increase chlorophyll, soluble sugar, soluble protein and SOD activity, and also significantly increase the net photosynthetic rate, stomata conductance and transpiration rate of leaves and 50 mg · L-1ALA foliar spray treatment to improve cut chrysanthemum relative best cold hardiness.