PRIMING AND GROWTH INHIBITOR IN THE PRODUCTION OF HIGH-QUALITY PEPPER SEEDLINGS

Abimael Gomes Silva,Talita Cristina Campos Pereira Da Silva,Flávio Ferreira Da Silva Binotti,Adriana Hernandes Pinto Matos,Tatiane Carla Silva,Edilson Costa

doi:10.32404/rean.v8i2.5828

Abstract

This study aimed to evaluate the effect of nitrate salts and a growth regulator on seed conditioning. Subsequently, the responses of the influence of the leaf application of paclobutrazol (PBZ) and nitrogen on the quality of seedlings of Capsicum frutescens L. were evaluated. Two experiments were carried out. The first experiment was conducted in a completely randomized design to evaluate priming, as follows: T1 – control, T2 – control (water), T3 – 0.2% calcium nitrate, T4 – 0.2% potassium nitrate, T5 – 0.1% calcium nitrate + 0.1% potassium nitrate, T6 – PBZ, and T7 – PBZ + 0.1% calcium nitrate + 0.1% potassium nitrate. The second experiment was carried out in a completely randomized design in a 2×5 factorial scheme consisting of priming (absence and presence of calcium nitrate) and leaf application of growth regulator, as follows: control (water), PBZ, PBZ + 1% nitrogen (calcium nitrate), PBZ + 1% nitrogen (urea), and PBZ + nitrogen (0.5% calcium nitrate + 0.5% urea). Physiological conditioning with a solution of 0.1% calcium nitrate increased the germination and seedling emergence rate and resulted in seedlings with a higher shoot length at 33 days after sowing (DAS), but seedlings at 50 DAS showed no differences in growth with its use. Leaf application of 0.1% paclobutrazol provided pepper (C. frutescens L.) seedlings with better distribution in growth according to the Dickson quality index.

Highlights

Peppers (Capsicum frutescens L.) are vegetables that produce spicy fruits, and their seedlings are obtained by sowing
This study aimed to evaluate the effect of nitrate salts and PBZ growth regulator on seed priming and the influence of the leaf application of PBZ and nitrogen on the quality seedlings of C. frutescens L
First experiment: The experimental design was completely randomized with four replications and seven solutions used in the physiological conditioning of the seeds, as follows: T1 - control, T2 - control, T3 - 0.2% calcium nitrate (Ca(NO3)2), T4 - 0.2% potassium nitrate (KNO3), T5 - 0.1% calcium nitrate + 0.1% potassium nitrate, T6 - 0.1% PBZ, and T7 - 0.1% PBZ + 0.1% calcium nitrate + 0.1% potassium nitrate

Summary

Introduction

Peppers (Capsicum frutescens L.) are vegetables that produce spicy fruits, and their seedlings are obtained by sowing. The effects of nitrate are related to several pathways in the initial germination processes and even in overcoming seed dormancy (Brasil, 2009; Kerbauy, 2013; Cardoso et al, 2015; Sanz et al, 2015). The incorporation of these salts can accelerate the germination rate (Binotti et al, 2014), a higher initial seedling growth (Batista et al, 2015), and increase the tolerance to abiotic stresses (Batista et al, 2016, Gouveia et al, 2017). Seedlings that present the shoot very developed in comparison with the root system are considered fragile and may present a high mortality rate in the field

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