Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (6): 1-7.doi: 10.11924/j.issn.1000-6850.casb2021-0433

Special Issue: 生物技术 水稻 园艺

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Plant Aqueous Extract of Momordica charantia: Effects on Rice Seed Germination and Seedling Growth

LI Xuefeng1(), WANG Jian1, YE Xiaoyuan1, ZHANG Xiuting1, WANG Lixue2()   

  1. 1Key Laboratory of Germplasm Resources of Tropical Special Ornamental Plants of Hainan Province, College of Forestry, Hainan University, Haikou 570228
    2Information Institute, Tianjin Academy of Agricultural Sciences, Tianjin 300192
  • Received:2021-04-22 Revised:2021-08-29 Online:2022-02-25 Published:2022-03-16
  • Contact: WANG Lixue E-mail:xfli0922@163.com;wanglixue0066@126.com

Abstract:

The aim is to clarify the allelopathic potential of Momordica charantia plants on succeeding rice and provide guidance for the application of rice-vegetable rotation system. The experiment was conducted with plant residues of M. charantia as experimental materials, the allelopathic effects of its aqueous extract on seed germination and seedling growth of three rice varieties (‘Texianzhan 25’, ‘BoⅡyou 818’ and ‘Ⅱyou 129’) were studied by petri dish and water culture methods. The results showed that the germination rates of the three rice varieties’ seeds were reduced when the concentration of aqueous extract only reached 0.20 g/mL, the seed vigor indexes of ‘BoⅡyou 818’ and ‘Ⅱyou 129’ were reduced, and the average germination time of ‘Texianzhan 25’ was prolonged by 1.13 days, but the germination inhibition rate was less than 20% and the seed vigor index inhibition rate was less than 30%. Although the root elongation of ‘Texianzhan 25’ seedlings was inhibited by dose-dependent effect, the aqueous extract was beneficial to the distribution of the total biomass of the three rice varieties’ seedlings to the aboveground parts. The aqueous extract with concentration≤0.15 g/mL had no effect or promoting effect on seedling height and total biomass, and the inhibition rate of total biomass was less than 28% when the concentration reached 0.20 g/mL. Therefore, the allelopathic inhibition effect of M. charantia on succeeding rice is weak.

Key words: Momordica charantia, seed vigor index, average germination time, rice seedling growth, biomass allocation

CLC Number: