贮藏条件对益母草、桔梗和白术种子发芽率的影响(简报)

EFFECTS OF STORAGE CONDITIONS ON GERMINATION RATE OF LEONURUS ARTEMISIA, PLATYCODON GRANDI- FLORUS AND ATRACTYLODES MACROCEPHALA SEEDS

摘要:

益母草、桔梗和白术3种药用植物种子均不耐贮藏,在收到种子后初始发芽率较低。益母草与桔梗种子萌发适温是25±1℃,而白术种子为15±1℃。在适温下,益母草、桔梗与白术种子的发芽率分别是69.8%、39.8%和46.8%.在15%RH下(硅胶密闭),种子贮藏较适宜,43%RH下贮藏种子的发芽率次之。益母草种子宜在15℃中贮藏,桔梗种子则宜在5℃中贮藏,在5℃下75%RH和43%RH贮藏后的发芽率相近。用PEG6000引发处理桔梗种子可以明显地提高发芽率,但益母草种子则出现负效应。

Abstract:

Seeds of Chinese medicinal plants Leonurus artemisia (Lour.) S. Y Hu, Platycodon grandoforus (Jacq.) A DC. and Atractylodes macrocephala Koidz. were used as materials for germination test under various storage conditions. The optimal germination temperature for L. artemisia and P grandoflorus were 25℃1℃, and that for A. macrocepha;a was 15 1℃. At optimal temperature, seed germination percentages of L. artemisia (25℃), P. grandiflorus (25℃) and A. macrocephala (15℃) were 69.8%, 39.8% and 46.8%, respectively. 15% of relative humidity (RH) was the optimal storage condition，followed by 43% RH．15℃ was the optimal temperature of seed storage for L. artemisia but 5 ℃ for P．grandiflorus．The germination percentage of P. grandiflorus seeds could be raised by PEG 6000 treatment，but contrary effect was observed in L. artemisia seeds．