Influence of bio-regulators on the seed germination and seedling growth of onion cultivars

Raquel Leszczynski,Gleberson Guillen Piccinin,Alessandro De Lucca E Braccini,Leandro Paiola Albrecht,Carlos Alberto Scapim,Lílian Gomes De Moraes Dan

doi:10.4025/actasciagron.v34i2.13401

Abstract

Application of bio-regulators improves the productivity of cash crops. Current experiment evaluates the effects of different doses of a bio-regulator on the seed quality of three onion cultivars ('Baia Periforme', 'Bola Precoce' and 'Hibrida Superex'). Six doses of bio-regulator at 0, 2.5, 5.0, 10.0, 20.0 and 30.0 mL kg -1 were applied and results were compared to those of three controls. The experimental design was entirely randomized under the factorial arrangement 3 x 6 + 3, with four replications. Data were subjected to analysis of variance (p < 0.05), and all seed treatments were compared with controls by Dunnett's test. The analysis of regression described the effects of the increasing doses of bio-regulator on germination and vigor responses which were evaluated by the first count of the germination test, the percentage of germination and the length of the roots and shoots of the normal seedlings. The application of the bio-regulator did not improve the percentage of seed germination and no positive response of the seedlings was reported from the cultivars 'Baia Periforme' and 'Bola Precoce'. However, seedling vigor of 'Hibrida Superex' was positively affected by the application of the bio-regulator.

Highlights

Onion (Allium cepa L.) is a condimental plant cultivated under different weather conditions since ancient times
Bio-regulators with a wide range of concentrations were applied on the seeds or sprayed on the leaves of soybean and common bean crops (ALLEONI et al, 2000; MOTERLE et al, 2008) or only on the seeds of Passiflora edulis Sims. f. flavicarpa Deg. and Strelitzia reginae (FERREIRA et al, 2007; GARCIA et al, 2006)
Current experiment evaluates the percentage of seed germination and the growth of seedlings from three cultivars of onion (Allium cepa L.) after the application of several concentrations of the bio-regulator on the seeds

Summary

Introduction

Onion (Allium cepa L.) is a condimental plant cultivated under different weather conditions since ancient times. Bio-regulators are natural or synthetic substances applied to seeds and other parts of plant to produce the plant’s hormone effects They increase plant productivity they have not been applied to agriculture systems in which plants are not propped by high technology (VIEIRA; CASTRO, 2001; VIEIRA; SANTOS, 2005). Bio-regulators with a wide range of concentrations were applied on the seeds or sprayed on the leaves of soybean and common bean crops (ALLEONI et al, 2000; MOTERLE et al, 2008) or only on the seeds of Passiflora edulis Sims. Current experiment evaluates the percentage of seed germination and the growth of seedlings from three cultivars of onion (Allium cepa L.) after the application of several concentrations of the bio-regulator on the seeds

Material and methods

Results and discussion

Conclusion