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Temporal expression of the sor1 gene and inhibitory effects of Sorghum bicolor L. Moench on three weed species

By Roseane Cavalcanti dos Santos, Gabriela de Morais Guerra Ferraz, Manoel Bandeira de Albuquerque, Liziane Maria de Lima, Péricles de Albuquerque Melo Filho and Alessandra de Rezende Ramos

Abstract

The temporal expression of gene sor1 and the inhibitory effect of Sorghum bicolor L. Moench against weeds were studied by semiquantitative polymerase chain reaction and intercropping management, respectively. To quantify sor1 expression, seeds were sown in pots and RNA was collected from the roots at 5, 10, 15, 20 and 30 days after emergence (DAE). In the inhibition assay, cotton and three weeds were evaluated during single cropping and during intercropping with S. bicolor. The assay was completely randomized, with eight replications. We found early expression of sor1 in most S. bicolor accessions by 5 DAE, and a gradual reduction thereafter. Only one of the accessions showed sor1 expression up to 30 DAE. In the inhibition assay, the most significant effects were related to the dry matter production (shoots and roots) of the weeds Cenchrus echinatus and Cynodon dactylon. The intercropping of cotton and S. bicolor had no apparent deleterious effects

Topics: Allelopathy, semiquantitative PCR, sorgoleone, weeds, Botany, QK1-989
Publisher: Sociedade Botânica do Brasil
Year: 2014
DOI identifier: 10.1590/0102-33062014abb3238
OAI identifier: oai:doaj.org/article:e1e50085048949ed8d50c54fb27287fe
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