TITLE:
Allelopathy of the Leaf Extract of Eucalyptus Genetic Material on the Physiological Performance of Millet Seeds
AUTHORS:
Marcos Vinicius de Sousa, Séfora Gil Gomes de Farias, Déborah Praciano de Castro, Romário Bezerra e Silva, Dandara Yasmim Bonfim de Oliveira Silva, Bruna Anair Souto Dias, Alexandre Faria da Silva, Graziele Nunes Lopes dos Santos, Daniele Cristina Pereira de Matos, Caio Varonill de Almada Oliveira
KEYWORDS:
Allelopathic, Germination, Pennisetum glaucum, Seedlings, Germination Speed
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.9 No.1,
January
11,
2018
ABSTRACT: This study aims to evaluate the possible allelopathic
effects of young and mature leaf extract from of two eucalyptus genetic
materials on the physiological performance of millet seeds. The experiment was
carried out in a completely randomized design, in a 5 × 2 × 2 factorial arrangement [five concentrations of the extract (0, 25%, 50%, 75%, and
100%) × two genetic materials (1 - Eucalyptus grandis × Eucalyptus
urophylla and 2 - Eucalyptus grandis × Eucalyptus camaldulensis) × two maturation stages of leaves (young and mature leaves)] with four replicates,
each one with 25 seeds. Seeding was performed on the germitest paper substrate
distributed in Petri dishes, moistened with the extract according to the
treatments, being allocated in biochemical oxygen demand (B.O.D) adjusted at 25°C and 12 h photoperiod. Percentage, speed index, mean
germination time, aerial part and primary root length, and dry matter weight of
aerial part and root system of seedlings were evaluated. The leaf extracts of
the two eucalyptus clones had all the analyzed variables changed with effect
more evident on young leaf extract of the genetic material 1. It can be
concluded that the tested genetic materials have a detrimental effect on the
physiological performance of millet seeds.