Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (18): 70-78.doi: 10.11924/j.issn.1000-6850.casb2021-0649

Special Issue: 生物技术 园艺

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Electrical Conductivity Affects the Growth and Fluorescence Response Characteristics of Pumpkin Seedlings

LI Jiawei(), CHEN Xiao, CHANG Jingjing, SONG Zhao, HE Yuzhi, ZHANG Baige()   

  1. Guangdong Key Laboratory of Vegetable New Technology Research, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640
  • Received:2021-07-13 Revised:2021-10-13 Online:2022-06-25 Published:2022-07-14
  • Contact: ZHANG Baige E-mail:825479150@qq.com;plantgroup@126.com

Abstract:

The purpose of this experiment is to explore the effects of the value of EC on the growth and fluorescence characteristics of pumpkin seedlings in matrix-free nutrient solution, and to provide a theoretical basis for the digital upgrading of seedling industry. ‘Xiangmi’ pumpkin was cultured in nutrient solutions with different EC values. The changes of pumpkin seedling biomass, phenotypic indexes, fast light curve and other parameters were analyzed. The results showed that the EC value significantly affected the biomass, root shoot ratio, leaf area and root structure of pumpkin seedlings. The biomass, leaf parameters and root structure indexes increased first and then decreased with the increasing of the EC value, and the comprehensive performance was the best when the EC value was 5 ms/cm. The root shoot ratio increased with the increasing of EC value. The changes of Fv/Fm, Y(II), Y(NO) and fast light curve with EC value were consistent with the changes of biomass parameters and phenotypic parameters of pumpkin seedlings, but the response speed was faster. This study suggests that the optimum EC value for pumpkin seedlings cultured in matrix-free nutrient solution should be 5 ms/cm, which indicates that the chlorophyll fluorescence parameters can directly and quickly reflect the influence of EC value on plants.

Key words: pumpkin seedling, matrix-free nutrient solution, electrical conductivity (EC), seedling growth, fluorescence characteristics

CLC Number: