&lt;b&gt;Physiological and physical quality of local &lt;i&gt;Araucaria angustifolia&lt;/i&gt; seed variety

Marilia Shibata,Nivaldo Peroni,Natalia Adan,Cristhyane Garcia Araldi,Cileide Maria Medeiros Coelho

doi:10.4025/actasciagron.v38i2.27976

<b>Physiological and physical quality of local <i>Araucaria angustifolia</i> seed variety

Marilia Shibata, Nivaldo Peroni + Show 3 more

Open Access

https://doi.org/10.4025/actasciagron.v38i2.27976

Copy DOI

Abstract

Araucaria angustifolia seeds are the basis for the rural economy in southern Brazil, and the species presents different botanical varieties. The objective of this work was to evaluate the diversity of physical, physiological and biochemical characteristics of Araucaria angustifolia seeds from local varieties: ‘sancti josephi’, ‘angustifolia’, ‘caiova’, and ‘indehiscens’. Seeds were collected from the cities of Painel and Urubici in Santa Catarina State and tested for moisture content, 1000-seed weight, emergence, emergence speed index (ESI), root and shoot length, electrical conductivity, tetrazolium, soluble carbohydrates, and starch content. Among the varieties cited above, the angustifolia variety from Painel displayed a greater 1000-seed weight, ESI, electrical conductivity and shoot length. However, the sancti josephi variety displayed a lower emergence percentage, 1000-seed weight, ESI, root and shoot length, and carbohydrate content. In a cluster analysis, based on Euclidean distance, three groups constituting the sancti josephi, indehiscens, and caiova/angustifolia varieties were found. In conclusion, there is great diversity in A. angustifolia seeds. The angustifolia and caiova varieties displayed similar diversity, and their physiological quality was better than that of other varieties. Variety characterization allowed for the compilation of information regarding seed collection and use for seedling production and species conservation.

Highlights

Araucaria angustifolia is a native species of economic, social and environmental importance from southern Brazil (Ribeiro & Cardoso, 2012; Wendling & Brondani, 2015)
The first studies on botanical varieties of A. angustifolia were performed by Reitz and Klein (1966), who outlined the presence of nine varieties: Maringá, v. 38, n. 2, p. 249-256, Apr.-June, 2016
In Santa Catarina, the varieties angustifolia, caiova, indehiscens and sancti josephi have been reported in the city of Três Barras (Zechini et al, 2012)

Summary

Introduction

Araucaria angustifolia is a native species of economic, social and environmental importance from southern Brazil (Ribeiro & Cardoso, 2012; Wendling & Brondani, 2015). There is evidence that this species has already experienced some degree of domestication as a result of pre-colonial human. Agronomy actions (Reis, Ladio, & Peroni, 2014). Management of this species may have favored morphological variations over time, indicating a possible domestication process related to changes in the reproductive system (Reis et al, 2014). ‘elegans’, sancti josephi, angustifolia, caiova, indehiscens, ‘nigra’, ‘striata’, ‘semi-alba’ and ‘alba’, mainly based on differences in coloration and ripening of the seeds. Mattos (2011) described five varieties: angustifolia, indehiscens, caiova, ‘dependens’, and ‘vinacea’, and one form: ‘catharinensis’. In Santa Catarina, the varieties angustifolia, caiova, indehiscens and sancti josephi have been reported in the city of Três Barras (Zechini et al, 2012)

Objectives

Methods

Results