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Plant Science Today (PST)

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Early Access

Pepper leaf curl Bangladesh Virus (PLCBV) and weed interaction: Consequences for growth, yield and biochemical vicissitudes in chilli (Capsicum annuum L.)

DOI
https://doi.org/10.14719/pst.5023
Submitted
12 September 2024
Published
28-04-2025

Abstract

The present study examines the impact of weeds on disease occurrence of Pepper Leaf Curl Bangladesh Virus (PLCBV) and its subsequent impact on growth, yield and biochemical parameters in chilli. The experiment was conducted at the agriculture farm of DAV University, Jalandhar. The field trial revealed a strong correlation between weed presence and leaf curl disease, with the highest disease incidence observed in open plots without weeding. The incidence of PLCBV, with the highest disease incidence (83.3%) was recorded 75 days after transplanting the chilli plants. The study highlighted the role of common weeds like Physalis spp., Solanum spp., Solanum spp. in higher disease incidence. Molecular identification of casual virus PLCBV was executed in chilli and weeds through PCR with degenerate primers. The key growth and yield parameters including plant height, fruit dimensions, number of fruits per plant, number of branches and overall yield were negatively impacted. Biochemical parameters such as photosynthetic pigment content, flavonoids, phenolic content, ascorbic acid, proline, protein content and malondialdehyde (MDA) were also analyzed, along with the enzymatic activities of catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX) and guaiacol peroxidase (GPX). Results indicated that infected plants showed reduced plant height, fruit length, fruit diameter, yield and content of chlorophyll a, chlorophyll b, total chlorophyll, lycopene, carotenoid, ?-carotene and other beneficial compounds like flavonoids, phenolic content, ascorbic acid and protein compared to healthy plants. Conversely, proline content, MDA and enzymatic activities were higher in infected plants. The current study concludes that weeds and PLCBV exacerbated major negative and detrimental consequences in chilli in terms of biochemical, growth and yield parameters.

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