Vigour of naked and husked oat cultivars under drought stress conditions

Andrzej Zieliński , Magdalena Simlat , Tomasz Wójtowicz , Maria Moś

Abstract

Reproduction of the sowing material characterized by high-vigour seeds creates possibilities for full utilization of the potential of specific cultivars under suitable growth and developmental conditions. One of the problems in seed production is high sensitivity of traditional oat cultivars to water deficits to which this crop is exposed especially in early spring, during seed germination, when low temperature causes the phenomenon of the so-called soil drought which limits the possibilities of using in full the winter water resources. The initiation of the imbibition process, necessary for activation of the enzymes responsible for germination, is determined by the amount of available soil water and by the range of temperatures which are most favourable for the germination process. Water stress occurring in early spring may delay field emergence or completely stop that process. Considering the above, the knowledge of the reaction of naked oat cultivars to drought conditions is still insufficient. The objective of the research was to determine the effect of the drought stress on vigour of naked and husked oat cultivars. The studies covered two husked oat cultivars: Cwał and Stoper, and eight naked oat cultivars: Abel, Avenuda, Bullion, Cacko, Izak, Pikant, Polar and Saul, characterized by high germinability (above 95%). Naked oat seeds showed susceptibility to varied thermal conditions during drought simulated with the use of PEG at a concentration of !1.5 MPa. A rise in temperature from 10EC to 20EC affected a 36% increase in the number of normally germinating seeds and a 51% increase in germination rate, as well as a 25% decrease in the average germination time. An increase in the osmotic potential from !1 to !2 MPa during initial induction of the drought stress resulted, in husked cultivars, in a 17% decrease in vigour determined on the basis of the percentage of normally developed seedlings. The oat seed vigour, evaluated on the basis of electrical conductivity of exudates, was modified by genotypic variability. Lower, by 60% on average, values were noted for naked cultivars. The coefficients of correlation between electrical conductivity of exudates and germinability r = !0.784**) or frequency of normally developed seedlings r = !0.919**) confirm the highly significant interrelationship between the methods used for assessing oat seed vigour under drought conditions
Author Andrzej Zieliński (FoAE / DoPBaS)
Andrzej Zieliński,,
- Department of Plant Breeding and Seed
, Magdalena Simlat (FoAE / DoPBaS)
Magdalena Simlat,,
- Department of Plant Breeding and Seed Science
, Tomasz Wójtowicz (FoAE / DoPBaS)
Tomasz Wójtowicz,,
- Department of Plant Breeding and Seed
, Maria Moś (FoAE / DoPBaS)
Maria Moś,,
- Department of Plant Breeding and Seed
Journal seriesBioTechnologia Journal of Biotechnology, Computational Biology and Bionanotechnology, ISSN 0860-7796, (B 13 pkt)
Issue year2013
Vol94
No3
Pages403-404
Publication size in sheets0.3
ConferenceVI Konferencja Polskiego Towarzystwa Biologii Eksperymentalnej Roślin = 6th Conference of the Polish Society of Experimental Plant Biology, 16-09-2013 - 19-09-2013, Łódź, Polska
ASJC Classification1110 Plant Science; 1305 Biotechnology
DOIDOI:10.5114/bta.2013.46423
URL http://www.biotechnologia-journal.org/Journal/-85/pdf-23816-70?filename=10.pdf
Internal identifierWRE/P/15/2013; WRE/1/15
Languageen angielski
Score (nominal)13
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2013 = 0.186
Citation count*
Additional fields
Udział procentowyA. Zieliński 80% ; M. Simlat - 5% ; T. Wójtowicz - 5% ; M. Moś - 10%
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