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Evidence of accelerated and altered pollen development after Imazapyr treatment in resistant sunflower Bragantia
Ochogavía,Ana Claudia; Bianchi,Marta Beatríz; Picardi,Liliana; Nestares,Graciela María.
ABSTRACT Imazapyr (IM) treatment applied at early reproductive developmental stages have been associated with induced male sterility in sunflower (Helianthus annuus L.). The aim of this work was to determine the effects induced by two different doses of IM-treatment (1X and 2X; 80 and 160 g a.i.·ha-1) on pollen grain yield, pollen viability and on the exine surface, in an intermediate resistant (I) and a completely resistant (R) genotype. An anatomical analysis of some stages during the microsporogenesis and microgametogenesis was also achieved by confocal microscopy. Plants of both genotypes survived the herbicide treatments and showed no external injury symptoms. Differential response to different doses of IM was obtained in R and I genotypes. The pollen...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Induced male-sterility; Confocal microscopy; Herbicide resistance; Helianthus annuus L.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020000100094
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