Genetika 2015 Volume 47, Issue 1, Pages: 97-106
https://doi.org/10.2298/GENSR1501097B
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Genotype dependent tolerance to herbicides of maize (Zea mays L.) inbred lines
Brankov Milan (Maize Research Institute „Zemun Polje“, Belgrade)
Simić Milena (Maize Research Institute „Zemun Polje“, Belgrade)
Dragičević Vesna (Maize Research Institute „Zemun Polje“, Belgrade)
Vrbničanin Sava (Faculty of Agriculture, Belgrade)
Spasojević Igor (Maize Research Institute „Zemun Polje“, Belgrade)
Herbicide application in seed maize requires special attention due to their
larger sensitivity than hybrid maize. The aim of study was to examine and
define the sensitivity/tolerance of the five maize inbred lines with
different susceptibility to herbicides (belonging to different heterotic
groups), based on alterations of secondary metabolites (phenolics, protein
sulfhydryl groups, phytic and inorganic phosphorus). Two groups of
herbicides: triketons (mesotrione and topramezone) and sulfonylureas
(rimsulfuron and foramsulfuron) were tested. Lines from independent heterotic
group, which were sensitive to herbicides expressed visible damages together
with significant reduce in grain yield, mainly induced by sulfonylurea
herbicides. Parallel with that, significant increase in phenolics, phytic and
inorganic phosphorus, as well as drop in protein sulfhydryl groups were
observed in their leaves. Tolerant lines (belonging to Lancaster group) had
mainly insignificant grain yield reduce, also with lesser variations in
sulfhydryl groups, content of phytic and inorganic phosphorus, as well as
increase in phenolics content. Among examined secondary metabolites, phytate
is the main factor, contributing to herbicide tolerance in maize lines. Owing
to lesser yield decrease and variation in content of examined secondary
metabolites, expressed in treatments with triketone herbicides, they usage
could be safe in maize lines.
Keywords: herbicides, maize lines, secondary metabolites, tolerance
Projekat Ministarstva nauke Republike Srbije,
br. TR 31068