Study on the Photosynthetic Characteristics of Pakchoi by Different Application Methods of Conyza canadensis Water Extract

DOI

10.2991/978-94-6463-829-5_31How to use a DOI?

Keywords

Conyza canadensis water extract; Pakchoi; Photosynthetic characteristics

Abstract

This study aims to understand the regulatory mechanism of Conyza canadensis water extract (CCE) on the photosynthetic characteristics of Pakchoi through two application methods: root irrigation and exogenous foliar spraying, in order to analyze the impact of allelopathic substances on the photosynthetic capacity of crops. The chlorophyll content, light response curve and CO₂ response curve of Pakchoi leaves under different treatments (irrigation with water at the root, irrigation with 15g/L CCE at the root, foliar spraying with 2g/L CCE, and foliar spraying with 1g/L CCE) were determined, and systematically analyzed the effects of different treatments on the photosynthetic characteristics of Pakchoi. The results show that irrigating the roots of crops with CCE can significantly increase the SPAD, maximum net photosynthetic rate (P_max) and saturation light (I_sat) of the crops, while reducing light compensation point (I_c) and CO₂ compensation point (Γ), and optimizing the utilization efficiency of light energy and CO₂ by the crops. The P_max and apparent quantum yield (AQY) of decreased compared with CK at foliar spraying treatment. This study clearly revealed the regulatory effects of the application method and concentration of CCE on the photosynthetic physiology of crops. Root irrigation can effectively activate photosynthetic performance, while foliar spraying produces certain inhibition. This not only provides important physiological basis for the resource utilization of the pioneer plant Conyza canadensison, but also points out the direction for the innovation of cultivation and management strategies for improving the quality and efficiency of the crops.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Download article (PDF)

TY  - CONF
AU  - Qiuyue He
AU  - Runzhuo Wu
AU  - Guohao Li
AU  - Junying Long
AU  - Siyu Liu
AU  - Jing Li
PY  - 2025
DA  - 2025/08/28
TI  - Study on the Photosynthetic Characteristics of Pakchoi by Different Application Methods of Conyza canadensis Water Extract
BT  - Proceedings of the 2025 International Conference on Chemical Engineering and Biological Science (CEBS 2025)
PB  - Atlantis Press
SP  - 310
EP  - 318
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-829-5_31
DO  - 10.2991/978-94-6463-829-5_31
ID  - He2025
ER  -