Tabernaemontana catharinensis A. DC. Seedling Emergence and Growth in Different Substrates

Marcelo Vielmo Afonso,Cleber Witt Saldanha,Luciane Almeri Tabaldi,Juçara Terezinha Paranhos,Hilda Hildebrand Soriani

doi:10.1590/2179-8087.077017

Marcelo Vielmo Afonso, Cleber Witt Saldanha + Show 3 more

Open Access

https://doi.org/10.1590/2179-8087.077017

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Abstract

Abstract This work aimed to evaluate the influence of the substrate composition on the emergence, vigor, and growth of Tabernaemontana catharinensis seedlings in a greenhouse. Seeds were placed to germinate by testing the following substrates: pure Mecplant and combined with fine texture vermiculite (V) or charcoal rice husk (CRH) in different proportions. Variables of emergence percentage, emergence speed index, height, collection diameter, root length, leaf area, dry mass (shoot, root, and total), Dickson quality index, and photosynthetic pigment contents were evaluated. Germinated plants on pure Mecplant substrate presented lower emergence values and morphophysiological parameters. This commercial substrate associated with vermiculite at 1:1 and 1:3 proportions provided higher seed vigor and higher seedling growth, proving to be more adequate for the seedling formation of the species. The formulated substrates did not show a significant influence on the photosynthetic pigment contents.

Highlights

AND OBJECTIVESIn the last decade the forestry sector has been highlighting the search for native species with potential for use in reforestation programs, urban afforestation and reconstitution of areas for plant preservation (Basso et al, 2011)
DC. (Apocynaceae) species, popularly known as cobrina or jasmim catavento, is a native tree to Brazil, a pioneer dispersed in several forest formations (Lorenzi, 2009), and is recommended for reforesting degraded areas and for mixed plantations destined to recover native forest
There was a significant effect of the different substrate compositions in the emergence and emergence speed index (ESI) of cobrina seedlings (Figure 1)

Summary

Introduction

AND OBJECTIVESIn the last decade the forestry sector has been highlighting the search for native species with potential for use in reforestation programs, urban afforestation and reconstitution of areas for plant preservation (Basso et al, 2011). (Apocynaceae) species, popularly known as cobrina or jasmim catavento, is a native tree to Brazil, a pioneer dispersed in several forest formations (Lorenzi, 2009), and is recommended for reforesting degraded areas and for mixed plantations destined to recover native forest. It is rich in phytochemical compounds (Bélo et al, 2009), having bioinsecticidal capacity (Corrêa & Vieira, 2001) and antioxidant properties (Piana et al, 2014). Studies related to the seminal propagation of the species are scarce

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