Abstract
ABSTRACT The accelerated aging test consists of evaluating the vigor of the seeds under conditions of high temperature and humidity, with the purpose of identifying the physiological quality of lots with similar germination. The objective of this study was to evaluate the efficiency of the accelerated aging test for classifying seed lots of P. moniliformis at different levels of vigor. Initially, the seed lots were assessed by means of seedling emergence, life velocity index, shoot length and root length, total dry mass of seedlings and determination of water content, before and after each period of aging. The experimental design for the whole world was based on a 3 × 4 factorial scheme (three seed lots and four periods of 24, 48, 72 and 96 h duration), with separate evaluations at temperatures of 38 °C and 41 °C. The accelerated aging test conducted at a temperature of 41 °C for 24 h was a more suitable combination for separating batches of P. moniliformis according to different levels of vigour, and made it possible to obtain results similar to the classification of lots in relation to the initial quality.
Highlights
Piptadenia moniliformis (Benth.) belongs to the Fabaceae family, known in the Brazilian Northeast as catanduva, and occurs in the Caatinga biome, often in the states of Maranhão, Piauí, Ceará and Bahia
It is essential that different segments of the forest sector attend to these requirements these requirements are essential to attend to the different segments of the forest sector, especially with regard to seed quality, which are evaluated through the germination test that provides security in the commercialization of these
The experiments were carried out with three lots of P. moniliformis seeds as follows: Lot 1 were collected in August 2014 from the city of Areia Branca - RN (4 ° 56 '52' 'S and 37 ° 7' 28 '' W); Lot 2 were collected in Mossoró - RN (5 ° 11 '17' 'S and 37 ° 20' 39 '' W) in August 2014; and Lot 3 (5 ° 03 '37 "S and 37 ° 23' 50" S)
Summary
Piptadenia moniliformis (Benth.) belongs to the Fabaceae family, known in the Brazilian Northeast as catanduva, and occurs in the Caatinga biome, often in the states of Maranhão, Piauí, Ceará and Bahia. Study of the handling aspects of P. moniliformis seeds is needed, since this input constitutes the main starting point for obtaining seedlings of satisfactory quantity and quality (LEÃO et al, 2015). According to these authors, it is essential that different segments of the forest sector attend to these requirements these requirements are essential to attend to the different segments of the forest sector, especially with regard to seed quality, which are evaluated through the germination test that provides security in the commercialization of these. Knowledge of the quality of a seed lot depends on the availability of accurate methods that generate reliable results (MARCOS-FILHO, 2015)
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