&lt;b&gt;Chronological analysis of the physiological quality of diaspores of &lt;i&gt;Myracrodruon urundeuva&lt;/i&gt; Fr. All. in semiarid regions

Aderdilania Iane Barbosa De Azevedo,Riselane De Lucena Alcântara Bruno,Givanildo Zildo Da Silva,Alberício Pereira De Andrade,José De Oliveira Cruz

doi:10.4025/actasciagron.v40i1.39423

Abstract

ABSTRACT. The objective of this study was to evaluate the physiological quality of diaspores from Myracrodruon urundeuva mother trees developing in the Cariri region of the state of Paraiba, Brazil. The seeds were collected during three consecutive years and from different areas of the Cariri region. The seed collection areas comprised two sites in the municipality of Boa Vista and one in the municipality of Sao Joao do Cariri. The diaspores had their water content determined and were submitted to the following tests: germination, seedling emergence, first count of germination and seedling emergence (within 5 days), and speed of germination and seedling emergence. The treatment means were compared using the deviance statistic. The collection years and collection areas were compared by the Tukey test at a 5% probability level. The comparison between mother trees was made through principal component analysis and cluster analysis. The detected variation in the quality of M. urundeuva diaspores is dependent on environmental conditions. The physiological quality of M. urundeuva diaspores varies according to mother tree, collection area and year. Mother trees of groups 1 and 2 are the most promising since they included representatives of all three areas and produced diaspores of high physiological quality.

Highlights

The Caatinga, a biome in the Northeast Region of Brazil, typically has a semiarid climate with plants physiologically adapted to extreme environmental conditions such as high temperatures, high radiation levels and evaporation; this specialization is an important reason for their high rate of endemism (Berger et al, 2007)
V. 40, e39423, 2018 region, where it is known as “aroeira”, “aroeirado-sertâo”, “aroeira-do-cerrado”, and “aroeira-preta” (Lorenzi, 2008; Pereira, Barros, Brito, Duarte, & Maia, 2014). Since it has the characteristics of pioneer species, M. urundeuva is recommended for the recuperation of degraded ecosystems, reforestation, and economic wood exploitation (Lorenzi, 2008; Kratka & Correia, 2015; Mota, Silva, Souza, Oliveira, & Santos, 2015; Canuto, Silva, Moraes, & Resende, 2016)
The production of leaves and fruits is dependent on the amount of available water; by analogy, variability is expected among different mother trees of the same species (Andrade, Souza, Silva, Silva, & Lima, 2006). In addition to those aspects, Santos, Vieira, Fagundes, Nunes, and Gusmão (2007) report that, within the same forest species, individual variations among trees can be found, these differences being due to environmental influences during seed development and to genetic variability; their report is in agreement with the results reported

Summary

Introduction

The Caatinga, a biome in the Northeast Region of Brazil, typically has a semiarid climate with plants physiologically adapted to extreme environmental conditions such as high temperatures, high radiation levels and evaporation; this specialization is an important reason for their high rate of endemism (Berger et al, 2007). 40, e39423, 2018 region, where it is known as “aroeira”, “aroeirado-sertâo”, “aroeira-do-cerrado”, and “aroeira-preta” (Lorenzi, 2008; Pereira, Barros, Brito, Duarte, & Maia, 2014). Since it has the characteristics of pioneer species (a deep root system and adaptation to adverse soil and climate conditions), M. urundeuva is recommended for the recuperation of degraded ecosystems, reforestation, and economic wood exploitation (Lorenzi, 2008; Kratka & Correia, 2015; Mota, Silva, Souza, Oliveira, & Santos, 2015; Canuto, Silva, Moraes, & Resende, 2016). The presence of phytochemical compounds in its bark, such as natural dimeric chalcones, which are anti-inflammatory products, and urundevein A and B, indicates the pharmaceutical potential of this species (Souza et al, 2007; Carlini, Duarte-Almeida, Rodrigues, & Tabach, 2010; Pereira et al, 2014; Machado, Sartori, Damante, Dokkedal, & Oliveira, 2016)

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