Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (32): 99-105.doi: 10.11924/j.issn.1000-6850.casb2021-1083

Special Issue: 生物技术 马铃薯

Previous Articles     Next Articles

Screening Nutrient Solution Formulas for Static Hydroponics of Sweet Potato ‘Shangshu 19’ Plantlet and Analysis of Endogenous Hormone Concentrations

WANG Yongjiang(), WANG Shuang, QIAO Qi, TIAN Yuting()   

  1. Institute of Plant Protection, Henan Academy of Agricultural Sciences/IPM Key Laboratory in Southern Part of North China for Ministry of Agriculture and Rural Affairs, Zhengzhou 450002
  • Received:2021-11-10 Revised:2022-03-31 Online:2022-11-15 Published:2022-11-09
  • Contact: TIAN Yuting E-mail:wyjabc@126.com;yutingtian@163.com

Abstract:

To provide reference for establishing rapid propagation system for virus-free ‘Shangshu 19’ plantlet, this study screened the optimal nutrient solution formula for sweet potato ‘Shangshu 19’ plantlets growing under static hydroponics, clarified the kinds of endogenous hormones and the effects of hydroponics on hormones in sweet potato plantlet leaves. The effects of different nutrient solution formulas with different concentrations on the growth of virus-free ‘Shangshu 19’ plantlets were studied by using the nutrient solutions including circulating water lettuce nutrition formula, Hoagland nutrient solution, and MS microelement, clear water was used as the control treatment. Under hydroponics and soil culture, endogenous hormones were detected by ultra-performance liquid chromatography-triple quadrupole tandem mass spectrometry. The results showed that: under the static hydroponics for 20 days, the maximum root length, average fresh root weight, relative chlorophyll content and average stem length of sweet potato plants were the best in 1/2 Hoagland nutrient solution, better than those in other nutrient solution treatments. 16 kinds of endogenous hormones were tested, 11 of them were detected in the sweet potato plants. Compared with those of the control, the concentration of abscisic acid (ABA) decreased by 71.37%, the concentration of indole-3-acetic acid (IAA) decreased by 51.64%, and the concentration of jasmonic acid (JA) increased by 231.68% in hydroponic plants. To our knowledge, this is the first report on virus-free ‘Shangshu 19’ plantlets which were cultured under hydroponics. 1/2-Hoagland nutrient solution is the most suitable solution for hydroponics. For the first time, 11 endogenous hormones in sweet potato were detected under hydroponic conditions. Compared with the control, the concentration of ABA and IAA in sweet potato plants under hydroponics decreased, and the concentration of JA increased. The concentration of ABA, JA and IAA varied greatly. The results can provide reference for further research and utilization of sweet potato hydroponic technology and the establishment of sweet potato plant factories.

Key words: hydroponics, nutrient solution formula, ‘Shangshu 19’, Hoagland nutrient solution, endogenous hormone

CLC Number: