Tag Archives: germination

280–287 P. Sooväli, M. Koppel and T. Kangor
Effectiveness of seed treatment against Fusarium spp. and Cochliobolus sativus of spring barley in different conditions
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Effectiveness of seed treatment against Fusarium spp. and Cochliobolus sativus of spring barley in different conditions

P. Sooväli*, M. Koppel and T. Kangor

Estonian Crop Research Institute, J. Aamisepa 1, EE48309 Jõgeva, Estonia
*Correspondence: pille.soovali@etki.ee

Abstract:

Effect of fungicide seed treatments on initial growth of spring barley (Hordeum vulgare L.) was evaluated in greenhouse trials. The soil collected from minimum tillage fields where spring barley, spring wheat (Triticum L.) and oilseed rape (Brassica napus L.) have been cultivated in previous growing season were used in trials. Eight fungicide seed treatments and untreated seed as the control were evaluated. Root rot severity and seedling emergence rate were assessed at growth stages 20–22. In addition the incidence of seed-borne Fusarium spp. and Cochliobolus sativus and germination were assessed in treated and untreated spring barley seeds in laboratory condition. Fungicides prothioconazole and tebuconazole significantly reduced incidence of seed-borne Fusarium spp. Seed treated with fludioxonil and tebuconazole more effectively decreased root rot infection in soil from minimum tilled barley field, fludioxonil + difenoconazole in soil from minimum tilled spring wheat field and prothioconazole mixes with tebuconazole or fluoxastrobin in soil from minimum tilled oilseed rape field. This study brings out the pre-crop and seed treatment interaction effect on control of root rot in spring barley.

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1372–1383 Z. Kruma, L. Tomsone, T. Ķince, R. Galoburda, S. Senhofa, M. Sabovics, E. Straumite and I. Sturite
Effects of germination on total phenolic compounds and radical scavenging activity in hull-less spring cereals and triticale
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Effects of germination on total phenolic compounds and radical scavenging activity in hull-less spring cereals and triticale

Z. Kruma¹, L. Tomsone¹, T. Ķince¹*, R. Galoburda¹, S. Senhofa¹, M. Sabovics¹, E. Straumite¹ and I. Sturite²

¹Latvia University of Agriculture, Faculty of Food Technology, Department of Food Technology, St. Rigas 22, LV-3004 Jelgava, Latvia
²Norwegian Institute of Bioeconomy Research, St. Fredrik A. Dahls 20, Ås, Akershus, NO 1432, Norway
*Correspondence: tatjana.kince@llu.lv

Abstract:

 The aim of the current research was to evaluate changes in the content of total phenolic compounds and radical scavenging activity at different germination stages of triticale, hull-less barley, hull-less oats, wheat, and rye. Grain germination was performed for 12, 24, 36 and 48 h at controlled conditions. Ultrasound assisted extraction was used for isolation of total phenolic compounds. For all extracts the total phenolic compounds content, DPPH radical and ABTS+ radical scavenging activity were determined spectrophotometrically. The results of the experiments demonstrated that the highest content of total phenolic compounds and the highest antiradical activity was determined in hull-less barley samples. In all studied grains the content of phenolic compounds increased significantly during soaking and germination process. DPPH radical scavenging activity during germination increased. ABTS+ radical scavenging activity also increased after soaking process and dynamics were cereal type dependent. Pearson’s coefficients between the phenolic compound levels and antioxidant activity taking into account all obtained results were high. Very strong positive correlations between the content of phenolic compounds and antioxidant activity were determined for triticale during germination. Also antioxidant activity determined by both tests correlated with the highest results for barley and oats. The highest content of total phenolic compounds determines the optimum duration of germination to be 24 hours, except rye samples where the highest value was reached only after 48 hours of germination. Shorter time was required to reach the highest values of DPPH radical activity – for wheat rye, and triticale, namely 12 hours.

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39-46 A.Pozeliene and S.Lynikiene
The treatment of rape (Brassica napus L.) seeds with the help of electrical field
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The treatment of rape (Brassica napus L.) seeds with the help of electrical field

A.Pozeliene and S.Lynikiene

Institute of Agricultural Engineering of Lithuanian Agricultural University,
Instituto st. 20, Raudondvaris, LT-54132 Kauno r., Lithuania; e-mail: ausra@mei.lt,
stely@mei.lt

Abstract:

The paper presents data about the sorting and stimulation of germination of rape seeds with the help of corona discharge field (CDF). The seed- preparing machines used the electric field to sort seeds according to the unit of mechanical and electrical features and improve germination. A survey of literature discussing the methods of the increasing of seed germination of electro�physical nature and the duration of the various periods from the stimulation to sowing time has been viewed. The conveyer type electric separator designed in the institute was used for the seed processing. The 3�105 V m-1 field strength was used for seed sorting according to the biological value in the electric separator. The change of the germination stimulation effect during the onemonth seed storage period was determined for the seeds with conditional moisture content but two different initial germination rates. The same strength of corona discharge field was used in research of the germination dynamics. The duration of seed treating in the field was 2 s. During the research the following facts were established: that by the sorting of non – conditional rape seeds it is possible to get 80% of seed to correspond to the requirements of the standard; CDF has positive influence on germination dynamics of treated seeds; density function of the seeds treated with CDF is described by lognormal distribution and that of untreated seeds, by normal distribution; the average increase of the germination of stimulated seeds has been reliable during the one-month period from stimulation to sowing. Statistical processing of the test data shows that the increase in germination of the seeds treated with CDF is reliable in comparison with the control.

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