&lt;b&gt;Effect of seed coat on the seed germination and seedling development of &lt;i&gt;Calophyllum brasiliense&lt;/i&gt; Cambess. (Clusiaceae)

Valquíria Aparecida Mendes De Jesus,Alessandro Lucca Braccini,Giovanna Emanuelle Goncalves Mariucci,Carlos Alberto Scapim,Fábio Lúcio Santos,Andréia Kazumi Suzukawa

doi:10.4025/actascibiolsci.v36i4.21401

<b>Effect of seed coat on the seed germination and seedling development of <i>Calophyllum brasiliense</i> Cambess. (Clusiaceae)

Valquíria Aparecida Mendes De Jesus, Alessandro Lucca Braccini + Show 4 more

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https://doi.org/10.4025/actascibiolsci.v36i4.21401

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Abstract

This work aimed to study the effect of the Calophyllum brasiliense seed coat on the seed germination process. To this end, three experiments were conducted in laboratory, greenhouse and screenhouse. From a total of six treatments, five are related to the seed coat (mechanical scarification; mechanical scarification followed by 2 hours in water, chemical scarification, hot water immersion and complete seed coat removal) and one control. Laboratory and greenhouse experiments were conducted in a completely randomized design (CRD). Screenhouse experiment was conducted in a completely randomized block design (RBD). We evaluated the total percentage, the speed index and the average time of germination or emergence. Data were subjected to analysis of variance and means compared by LSD test, at 5%. Under the conditions of this work, it was possible to infer that, in laboratory, mechanical scarification followed by 2 hours in water increases the proportion and germination speed index (GSI), in the greenhouse, the complete seed coat removal increases the percentage and emergence speed index (ESI), and in the screenhouse, mechanical scarification followed by 2 hours in water and chemical scarification presented the best results. The average germination time was not significantly different in the three experiments evaluated.

Highlights

Clusiaceae includes trees, bushes, lianas and herbs of economic interest for timber production, edible fruit, chemical derivatives of pharmaceutical interest and others
Given the importance and potential of Calophyllum brasiliense (Clusiaceae) and the lack of information, standardization, and analysis methods for the vast majority of forest species, especially for the species in question, this study evaluated the effect of Calophyllum brasiliense seed coat on the seed germination process, in order to achieve a greater percentage of germinated seeds in a faster and uniform process
The analyses of variance performed for germination and germination speed index in C. brasiliense seeds indicated significant differences at 5% among the treatments

Summary

Introduction

Clusiaceae includes trees, bushes, lianas and herbs of economic interest for timber production, edible fruit, chemical derivatives of pharmaceutical interest and others. Calophyllum brasiliense Cambess., commonly known as guanandi, a climax species (SANTOS et al, 2008), is a large arboreal plant, with height ranging from 20 to 30 m, diameter between 40 and 60 cm and wood density of 0.62 g cm-3 (LORENZI, 2002). In addition to presenting chemical and pharmacological importance, as reported by Júnior et al (2005) and Noldin et al (2006), it is recommended for riparian forest restoration, mostly in places subjected to periodic flooding from medium to long term (CARVALHO, 1994). This species has good quality wood and characteristics similar to the mahogany and cedar, providing a possible alternative to replace them

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