Effects of Bioorganic Fertilizers on the Leaf Antioxidant Enzyme Activity and the Photosynthetic Characteristics of Replanted Szechuan Pepper, Zanthoxylum simulans

Abstract

Continuous cropping obstacles hamper the efficient growth and yield of Szechuan pepper, Zanthoxylum simulans. The current study investigated the impact of different levels of bioorganic fertilizer on the leaf physiological and photosynthetic characteristics of Z. simulans to provide a theoretical reference for continuous Z. simulans crop cultivation. A bioorganic fertilizer was used to treat seedlings growing in 25-year-old continuous cropping soil. Five fertilizer treatments were applied. The impacts of the treatments on the activity of defense enzyme and photosynthetic parameters of Z. simulans leaves were determined. The different concentrations of bioorganic fertilizer reduced to varying degrees the malondialdehyde (MDA) content and intercellular CO 2 concentration (Ci), and increased the activity of peroxidase (POD), superoxide dismutase (SOD), and ascorbate peroxidase (APX), as well as the chlorophyll content, net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) of Z. simulans leaves. The results showed that most significant increases or decreases were achieved with 100 g/L bioorganic fertilizer (Y2). Thus, the application of bioorganic fertilizer at a rate of 100 g/L can significantly improve the activity of relevant defense enzymes and photosynthetic parameters of Z. simulans, and reduce the MDA content, enhancing the stress resistance of the plants, promoting their growth and addressing, to some extent, obstacles associated with continuous cultivation.

Identification of WRKY gene family in Dioscorea opposita Thunb. reveals that DoWRKY71 enhanced the tolerance to cold and ABA stress

“…The antioxidant enzyme content is the main index reflecting the degree of peroxidation of cells in the plant ( Zhang et al, 2020 ). In this study, under low temperature and ABA treatments, the content of soluble protein first decreased and then increased, the SOD activity first increased and then decreased, and the POD activity showed an overall upward trend.…”

The effects of two biofertilizers on the physiology of replanted Zanthoxylum bungeanum and soil phenolic acids

“…In the initial phase, we utilized bio-organic fertilizer and microbial bacterial fertilizer to treat soil that had been continuously cropped. By examining the growth and photosynthetic characteristics of replanted Zanthoxylum bungeanum, I investigated the promoting effect and photosynthetic mechanism of a mixture of biofertilizers on the growth of continuously cropped Zanthoxylum bungeanum (Zhang et al 2021). However, the physiological and biochemical characteristics of replanted Zanthoxylum bungeanum and the impact of soil allelochemicals are still not fully understood.…”