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5-氨基乙酰丙酸(ALA)对遮光环境下菘蓝的生长、叶片气孔气体参数和生物碱含量的影响

唐晓清**,王康才,肖云华,汪良驹   

  1. (南京农业大学园艺学院, 南京 210095)
  • 出版日期:2013-05-10 发布日期:2013-05-10

Effects of 5-aminolevulinic acid (ALA) on the growth, leaf stomatal gas exchange, and leaf alkaloids content of Isatis indigotica under shading condition.

TANG Xiao-qing**, WANG Kang-cai, XIAO Yun-hua, WANG Liang-ju   

  1. (College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China)
  • Online:2013-05-10 Published:2013-05-10

摘要:

研究了不同浓度的5-氨基乙酰丙酸(ALA)处理遮光环境对菘蓝(Isatis indigotica)生长和靛蓝、靛玉红含量的影响。结果表明:遮光显著降低菘蓝幼苗叶片叶绿素含量、光合气体交换参数、根长、根径、生物量以及靛蓝、靛玉红含量,而外源ALA处理可以缓解遮光对菘蓝营养生长、光合作用以及生物碱积累的抑制效应;其中,13.3~25 mg·L-1的ALA对营养生长以及光合作用的促进效应最明显,而100 mg·L-1的ALA对生物碱积累的促进效应最明显。作者建议,在弱光条件下,用低浓度ALA处理可以提高菘蓝生物学产量,而在生物碱积累期,用较高浓度ALA处理可以提高菘蓝的药用成分含量。
 

关键词: 冬麦春播, 播期, 光合效率, 叶绿素荧光动力学参数, 籽粒产量

Abstract: This paper studied the effects of different concentration 5-aminolevulinic acid (ALA) on the growth and alkaloids (indigo and indirubi) content of Isatis indigotica seedlings under shading condition. Shading decreased the root length and diameter, plant biomass, chlorophyll content, photosynthetic gas exchange parameters, and alkaloid content of the seedlings significantly, while exogenous ALA could alleviate the inhibition effect of shading on the vegetative growth, photosynthesis, and alkaloid accumulation of the seedlings. Spraying 13.3-25 mg·L-1 of ALA was most effective to promote the vegetative growth and photosynthesis, and spraying 100 mg·L-1 of ALA was most effective to promote alkaloids accumulation. It was suggested that under low light condition, spraying low concentrations (13.3-25 mg·L-1) ALA at the early growth stage of I. indigotica- could promote its biomass production, and spraying higher concentration (100 mg·L-1) ALA could promote the alkaloid production of I. indigotica for medical purpose.

Key words: winter wheat sowed in spring, sowing date, photosynthetic efficiency, chlorophyll fluorescence parameter, grain yield.