POLLEN VIABILITY OF Eragrostis plana GENOTYPES FROM DIFFERENT GEOGRAPHIC POPULATIONS IN RIO GRANDE DO SUL

Autores

  • Fernando Piccinini
  • Viviane Frescura
  • Haywood Laughinghouse
  • Naylor Perez
  • Solange Tedesco

Palavras-chave:

Acetic orcein 2%, Alexander reactive, pasture invaders, pollen viability, reproductive characteristics

Resumo

Livestock production in southern Brazil is largely sustained by the production of natural pastures, whose distinct botanical compositions, adapted to different climatic and soil nuances, have allowed combining animal production and environmental preservation over time. Among the main problems related to vegetation management, is the disturbing expansion of the exotic grass Eragrostis plana Ness., which deserves to be highlighted due to its high capacity for colonization of the grasslands and the trend of excluding the native plant community. Despite the importance of this species for the region, information on its biology are insufficient, which impedes the establishment of efficient mechanisms for invasion control. In this paper, the estimation of pollen viability of E. plana was studied by staining, using acetic orcein 2% and Alexander reactive. Three different populations were used, evaluating 6 genotypes per population. The young inflorescences were collected and fixed in ethanol: acetic acid (3:1) for 24 hours room temperature, then stored in 70% ethanol under refrigeration. To evaluate pollen viability, then 300 pollen grains of each blade were analyzed. All studied genotypes showed high pollen viability for both stains, and the Alexander reactive proved to be more appropriate to estimate the pollen viability of E. plana. 

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Publicado

2012-11-30

Como Citar

Piccinini, F. ., Frescura, V., Laughinghouse , H. ., Perez, N. ., & Tedesco, S. . (2012). POLLEN VIABILITY OF Eragrostis plana GENOTYPES FROM DIFFERENT GEOGRAPHIC POPULATIONS IN RIO GRANDE DO SUL . ENCICLOPEDIA BIOSFERA, 8(15). Recuperado de https://conhecer.org.br/ojs/index.php/biosfera/article/view/3702

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