Original scientific paper

ELECTRICAL CONDUCTIVITY OF SOYBEAN SEED AT DIFFERENT IMBIBITION TEMPERATURES

Ivana Čičić ; Faculty of agriculture in Osijek
Marija Špoljarević ; Faculty of agriculture in Osijek
Božica Japundžić – Palenkić ; University of applied sciences of Slavonski Brod
Luka Andrić ; Agricultural institute in Osijek
Tihana Teklić ; Faculty of agriculture in Osijek

Abstract

Large and medium-sized seed of three soybean cultivars (Zora, Lucija and Korana)
were evaluated using commonly applied seed quality analytical methods (1000 grain
mass, moisture content, rate of germination - EK, standard germination test - SK) as
well as cold test (CT). Afterwards, seed electrical conductivity test (EC) - „bulk“ method - was performed at three constant temperatures (10, 20 and 30oC, 24 h), with
subsequent determination of seed water uptake during imbibition, as the % of the initial
seed sample weight. The tested soybean cultivars did not show significant differences
regarding EK, SK and CT. Medium-sized seed showed very significantly higher EK and
SK in comparison with large seed. According to the current EC evaluation scale for
large-seeded legumes and CT values, both seed categories expressed high vigour. EC
test varied between 18.0 – 29.5 μScm-1g-1, and significantly higher values were seen at
30oC during imbibition. The highest EC and the lowest CT values were obtained with
the seed of cultivar Korana. Seed size had no effect on EC test value. The established
significant negative correlation between EC and CT in medium-sized seed implies that
EC test performed at 20oC could be suitable tool for fast soybean seed vigour analyses,
if medium-sized seed dominated in seed sample. Seed water content after imbibition in
EC test varied between 114.5 - 130.4% regarding seed initial weight. Considering
significant influence of cultivar, seed size category and their interaction, the highest
water uptake rate was observed at the highest imbibition temperature applied, as well as
in medium-sized seed. These results suggest further investigation of seed imbibitional
processes in both laboratory and field conditions, with aim of better comprehension of
soybean genetic potential in imbibitional damage resistance and successful emergence
in adverse conditions.

Keywords

seed electrical conductivity; imbibition; soybean; temperature; seed vigour

Hrčak ID:

99126

URI

https://hrcak.srce.hr/99126

Publication date:

24.9.2012.

Article data in other languages: croatian

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