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1

Diversity in freezing tolerance and tolerance to deacclimation among Polish and European cultivars and advanced breeding lines of winter barley

100%
Wojcik-Jagla M., Korczak Z.
Acta Physiologiae Plantarum
|
2018
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tom 40
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nr 11-11th International Conference Plant Functioning under Environmental Stress...
2

Development of DArT-based PCR markers for selecting drought-tolerant spring barley

81%
Fiust A., Rapacz M., Wojcik-Jagla M., Tyrka M.
Journal of Applied Genetics
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2015
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tom 56
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nr 3
3

Differential regulation of barley (Hordeum distichon) HVA1 and SRG6 transcript accumulation during the induction of soil and leaf water deficit

81%
Wojcik-Jagla M., Rapacz M., Barcik W., Janowiak F.
Acta Physiologiae Plantarum
|
2012
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tom 34
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nr 6
Drought tolerance in barley is highly correlated with the expression of two genes: Hordeum vulgare aleurone 1 (HVA1) and stress-responsive gene 6 (SRG6). Though their role in the mechanism of drought response in barley has been confirmed in transgenic plants, the regulation pathways of these genes’ expression have not been sufficiently studied, especially on the level of whole plants. We used four barley genotypes of different drought tolerance to establish and compare the expression profiles of SRG6 and HVA1 and to associate them with the possible physiological and biochemical signals of water deficit. Both genes studied were expressed to a greater extent in drought tolerant genotypes. The highest level of HVA1 transcript accumulation was observed under conditions where the leaf water potential decreased significantly. In tolerant genotype this signal was partially replaced with abscisic acid (ABA) signal of soil water deficit and the final transcript accumulation was about 14 times lower than in the case of leaf water deficit. In the case of SRG6 the main signal which can triggered the transcript accumulation was ABA but in the case of tolerant genotype the direct effect of leaf water deficit was also observed. Thus, it seems to be possible that in drought tolerant barley genotypes, HVA1 and SRG6, are not only more expressed during drought, but tolerant genotypes may be also more sensitive to various internal signals confirming environmental water deficit. The putative role of hydrogen peroxide as a signal of water deficit in the regulation of both genes expression was not confirmed. The drought-induced expression of both HVA1 and SRG6 was additionally reduced in the light. Because of this powerful complexity, a true understanding of plant response to drought requires further studies integrating gene expression and cell signaling analysis in single organs or tissues with whole plant physiology and long distance signaling.
4

Identification of novel, potential freezing tolerance genes in barley on the basis of QTL and association mapping

81%
Fiust A., Wojcik-Jagla M., Rapacz M.
Acta Physiologiae Plantarum
|
2016
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tom 38
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nr 01-10th International Conference Plant Functioning under Environmental Stress...
5

Direct and indirect measurements of freezing tolerance: advantages and limitations

81%
Rapacz M., Sasal M., Wojcik-Jagla M.
Acta Physiologiae Plantarum
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2015
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tom 37
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nr 08
The freezing tolerance of 69 accessions of field-grown, common wheat (Triticum aestivum) was assessed in three consecutive winters. To measure freezing tolerance directly, field-grown plants were subjected to a range of freezing temperatures in a controlled environment and plant regrowth was subsequently assessed. Indirect assessments of freezing tolerance, as measured by chlorophyll fluorescence transient measurements followed by a JIP-test (an in vivo measurement of the adaptive behavior of the photosynthetic apparatus), were performed on detached leaves frozen at the same time as whole plants. Both direct and indirect tests were also used on plants cold acclimated in the laboratory. These results were compared with results of a field survival study performed at seven experimental sites. An analysis of the data indicated that only some of the JIP-test parameters were suitable for the prediction of freezing tolerance and winter survival. Estimates of cold hardiness were very similar, regardless of the experimental year, but were dependent on the method of cold acclimation and time of sampling. Indirect measurements of cold hardiness were more in line with the field survival data for field-cold-acclimated plants sampled in mid-winter than for plants that were either sampled earlier or cold acclimated in the laboratory. Indirect measurements taken on leaves that had not frozen failed to provide accurate estimates of cold hardiness. Our observations, together with previously reported findings, indicate that cold acclimation under natural field conditions activates a greater array of freezing tolerance mechanisms than cold acclimation performed in under controlled environmental conditions in a laboratory.
6

The effect of simulated drought on HVA1 and SRG6 gene expression in spring barley

71%
Romanek J., Walczak H., Wojcik-Jagla M., Jurczyk B., Rapacz M.
Electronic Journal of Polish Agricultural Universities. Series: Biotechnology
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2011
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tom 14
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nr 3
7
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High-throughput phenotyping and genotyping in comparative QTL analysis of early short-time drought tolerance in Polish fodder and malting spring barleys

61%
Wojcik-Jagla M., Rapacz M., Tyrka M., Koscielniak J., Crissy K., Zmuda K.
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
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2013
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tom 94
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nr 3
8

Identyfikacja czynników determinujących odporność jęczmienia ozimego (Hordeum vulgare L.) na suszę i mróz

51%
Zur I., Dubas E., Malaga S., Janowiak F., Janeczko A., Rapacz M., Hura T., Waligorski P., Ostrowska A., Wojcik-Jagla M.
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
|
2019
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nr 286
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