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Nitrogen metabolism in pepper plants applied with different bioregulators
J M Ruiz1, N Castilla, L Romero
1Departmento de Biología Vegetal, Facultad de Ciencias, Universidad de Granada, 18071 Granada, Spain, and Departamento de Horticultura, CIFA, Camino de Purchil s/n, 18004 Granada, Spain.
Journal of Agricultural and Food Chemistry
|July 18, 2000
Summary
Certain bioregulators impact pepper plant nitrogen metabolism. Biozyme, a hormone-based treatment, enhanced nitrate assimilation, leading to increased growth and yield, while amino acid-based treatments were detrimental.
Area of Science:
- Plant Physiology
- Agricultural Science
- Biochemistry
Background:
- Nitrogen metabolism is crucial for plant growth and yield.
- Bioregulators can influence plant physiological processes.
- Pepper plants (Capsicum annuum L.) are economically important crops.
Purpose of the Study:
- To investigate the effect of specific bioregulators on nitrogen metabolism in pepper plants.
- To determine the impact of bioregulators on nitrate reductase and nitrite reductase activities.
- To evaluate the influence of bioregulators on plant growth and fruit yield.
Main Methods:
- Pepper plants were grown under controlled conditions with regular fertilization.
- Treatments included a control, fosfonutren (amino acids and micronutrients), biozyme (hormones and micronutrients), and GA(3).
- Analysis involved measuring nitrate, organic nitrogen, amino acids, proteins, enzyme activities (NR, NiR), foliar dry weight, and yield.
Main Results:
- Fosfonutren (T1) negatively affected nitrate utilization, reducing growth and yield.
- Biozyme (T2), containing a combination of hormones, significantly increased nitrate assimilation.
- Biozyme treatment resulted in the highest foliar dry weight and fruit yield per plant.
Conclusions:
- Bioregulators containing essential amino acids may hinder nitrogen utilization in pepper plants.
- Hormone-based bioregulators, like biozyme, can enhance nitrate assimilation and improve plant productivity.
- Optimizing bioregulator composition is key for enhancing nitrogen metabolism and yield in Capsicum annuum.