Seedling length and soybean seed vigor

Michele Renata Revers Meneguzzo,Géri Eduardo Meneghello,Simone Morgan Dellagostin,Ariele Paula Nadal,Fernanda Da Mota Xavier,Ivan Ricardo Carvalho,Vanessa Pinto Gonçalves,Francine Lautenchleger,Nadia Canali Lângaro

doi:10.1590/0103-8478cr20190495

Abstract

ABSTRACT: The differentiation of seedling growth and development is the result of the vigor level of the seed lot. Because of this, knowing the seedling growth curve is essential for the evaluation of the seedling length test, to be carried out at the moment when any differences in vigor really manifest, thus being able to reduce the time of evaluation of the test. In this research, the objective was to determine the most efficient time interval to perform the seedling length test in soybean seeds, depending on the vigor levels. The evaluated characteristics were percentage of seed germination, first germination count, emergency, days for emergence, aerial, root and total length (evaluated every 12 hours), aerial, root and total dry mass in completely randomized design. High vigor seeds originated seedlings with higher growth rates (cm. h-1), with vigor being one of the factors that interfere in the seedling length test. After 96 hours of the seedling length test, there was a statistical differentiation between the three vigor levels tested. The soybean seedling length test between lots, with different vigor, can be performed 96 hours after sowing.

Highlights

The use of high value-added seeds with genetic, physical, physiological and sanitary quality plays a fundamental role in obtaining the full productive potential of the species
Vigor tests are an increasingly routine tool used by seed industries to determine their physiological quality (MARCOS FILHO, 1999)
The analysis of growth stands out as a precise, fast and accessible method relatively simple, cost-effective, do not require special equipment or deep training (ALVARENGA et al, 2013). It allows the study of the seedling performance under different environmental conditions and under management practice, and it is possible to evaluate the contribution of different physiological processes on plant performance (RADFORD, 1967; LOPES & LIMA, 2015)

Summary

Introduction

The use of high value-added seeds with genetic, physical, physiological and sanitary quality plays a fundamental role in obtaining the full productive potential of the species. High quality seeds involve a number of characteristics, among which are the physiological attributes, which are vigor and germination (MARCOS FILHO, 2002). Vigor tests are an increasingly routine tool used by seed industries to determine their physiological quality (MARCOS FILHO, 1999). The analysis of growth stands out as a precise, fast and accessible method relatively simple, cost-effective, do not require special equipment or deep training (ALVARENGA et al, 2013). It allows the study of the seedling performance under different environmental conditions and under management practice, and it is possible to evaluate the contribution of different physiological processes on plant performance (RADFORD, 1967; LOPES & LIMA, 2015). It can be used to investigate the effect of ecological phenomena on plant growth, as well as seed quality on initial soybean growth (AISENBERG et al, 2014) and beans (FACIN et al, 2014)

Objectives

Methods

Results