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Contents (Abstracts)
Volumes
11: 1 (1963)
27: 2 (1979)
31: 1 (1983)
35: 1 (1987)
36: 1 (1988)
40: 3-4 (1995)
42: 2 (1999)
43: 3 (2000)
44: 1-2 (2001)
45: 2 (2002)
46: 1 (2003)
47: 1 (2004)
47: 2 (2004)
48: 1 (2005)
48: 2 (2005)
49: 1 (2006)
49: 2 (2006)
50: 1 (2007)
50: 2 (2007)
51: 1 (2008)
51: 2 (2008)
52: 1 (2009)
52: 2 (2009)
53: 1 (2010)
53: 2 (2010)
54: 1 (2011)
54: 2 (2011)
55: 1 (2012)
55: 2 (2012)
56: 1 (2013)
56: 2 (2013)
57: 1 (2014)
57: 2 (2014)
58: 1 (2015)
58: 2 (2015)
59: 1 (2016)
59: 2 (2016)
60: 1 (2017)
60: 2 (2017)
61: 1 (2018)
61: 2 (2018)
62: 1 (2019)
62: 2 (2019)
63: 1 (2020)
63: 2 (2020)
64: 1 (2021)
64: 2 (2021)
65: 1 (2022)
65: 2 (2022)
Contents:
Volume 58, Nr. 1 (2015)
β-lactam antibiotics,
recA mutation and SOS response
Zdravko PODLESEK
Abstract
The claim that β-lactam antibiotics induce the SOS response, allowing
E. coli
survival in the presence of low antibiotic concentrations, was evaluated. No association between the
recA
gene and antibiotic survival rate was found. Disagreements with published observations are attributed to discrepancy in minimum inhibitory concentrations and growth characteristics of various strains carrying the
recA
mutation. Moreover, β-lactam antibiotics do not induce expression of the SOS regulated gene
cka
, encoding colicin K in wild-type strains.
Keywords
SOS response,
E. coli
, β-lactam antibiotics, antibiotic resistance |
Taxonomy, phytogeography and phytosociology of
Laserpitium krapfii
Crantz in Slovenia
Tinka BAČIČ, Marko ACCETTO, Branko VREŠ, Igor DAKSKOBLER
Abstract
The article discusses the occurrence, distribution and phytosociological affinity of
Laserpitium krapfii
in Slovenia. According to some literature sources (Tutin 1968, Fischer et al. 2008) and the distribution patterns, two subspecies of
L. krapfii
are
be expected in Slovenia:
L. krapfii
subsp.
krapfii
and
L. krapfii
subsp.
gaudinii.
The
revision of the Slovene herbarium material in LJU and LJS herbaria confirmed only
the occurrence of its type subspecies
.
It has a Dinaric pattern of distribution (NW-SE) in the Alpine, Prealpine, Dinaric and Predinaric phytogeographical regions, with most of its known localities in the hills south of Ljubljana, in the Snežnik mountains, in the Kočevje region with the Kolpa Valley and in the Gorjanci mountains. Since the species mostly thrives in the mountain beech forests, it can be considered as a diagnostic
(differential) species of the Illyrian alliance
Aremonio-Fagion
.
Keywords
Laserpitium krapfii
subsp.
krapfii
, taxonomy, phytogeography,
Aremonio-Fagion
, Slovenia |
Cytological analysis of
Fallopia japonica and
Fallopia ×
bohemica shoots during growth season
Jasna DOLENC KOCE, Katarina ŠOLN, Brina STANČIČ, Jon BANČIČ, Timotej ČEPIN, Aleš KLADNIK
Abstract
Fallopia japonica
and
Fallopia
×
bohemica
are two very invasive plant species in Europe and North America. Their main mode of spread is vegetative reproduction. In spring new shoots emerge from the overwintering rhizome, grow rapidly and develop broad leaves which shade undergrowth plants. We studied cell size and starch accumulation in three stem regions at five sampling times during one growth season to determine possible differences in growth dynamics of both
Fallopia
species. On average
F.
×
bohemica
had somewhat larger cells than
F. japonica
but the differences were not significant, except in the internodes of the middle stem region with differentiating cells. Also, cell growth dynamics of both species was similar and the only difference was detected at the 2
nd
sampling when cells of
F.
×
bohemica
were more elongated.
F.
×
bohemica
also
accumulated starch earlier in the growth season and in younger tissues than
F. japonica
.
Keywords
Fallopia japonica
,
Fallopia
×
bohemica
, cell size, starch, growth |
The effect of different compounds of selenium and iodine on selected biochemical and physiological characteristics in common buckwheat and pumpkin sprouts
Mateja GERM, Nina KACJAN MARŠIČ, Janja TURK, Marjetka PIRC, Aleksandra GOLOB, Ana JERŠE, Ana KROFLIČ, Helena ŠIRCELJ, Vekoslava STIBILJ
Abstract
There is little data about possible interactions between selenium and iodine on plants. Se is essential for I metabolism in the thyroid in mammals. Thus, it is of great importance to carry out the research with simultaneous application of
both elements in plant cultivation that are used for human consumption. Seeds of common buckwheat and pumpkins were soaked in solutions: 10 mgSe/L in the form of selenite or selenate, and 1000 mgI/L in the form of iodide or iodate and their combinations. The content of chlorophyll
a
and
b
, and carotenoids were measured. Further, the measurements of fluorescence of chlorophyll
a
were performed. Control buckwheat sprouts and sprouts from seeds soaked in Se(VI) and Se(VI)+I(-1), had the lowest and similar amount of chlorophyll
a
and carotenoids. There was little effect of different treatments on potential photochemical efficiency of photosystem II (PS II) in common buckwheat sprouts. In pumpkin sprouts neither of treatment affected the amount of photosynthetic pigments, as well as potential photochemical efficiency of (PS II) which was around 0.8.
Keywords
sprouts, common buckwheat, pumpkins, selenium, iodine |
Biodiversity, the present ecological state of the Aral Sea and its impact on future development
Mihael J. TOMAN, Igor PLOTNIKOV, Nikolai ALADIN, Philip MICKLIN, Zaualkhan ERMAKHANOV
Abstract
The Aral sea
used to be the fourth largest lake in the world. Its catchment area is huge, two main rivers (Amu Darya and Syr Darya) feed the lake. The balance of hydrological regime changed drastically after 1960 due to regulation of both main rivers and diversion of water for agricultural irrigation and intense cotton production. Salinity increased and most of invertebrate and fish species disappeared. A significant drop of water level has been recorded in the past 20 years and Aral Lake is presently divided into a small northern lake basin and a larger south basin. Kokaral dam construction resulted in increased water level and decreased salinity. Many invertebrate species reappeared in Small Aral and fish returned from Syr Darya river. Ecological situation in Large Aral is different, eastern part of this basin is completely dried out. The data on salinity levels, some chemical characteristics and above all the data about zooplankton, zoobenthos and fish in Small Aral have been recorded and presented in the article. Salinity ranges between 1 and 8 g/L, the lowest is near the river inlet. Five
species of zooplankton (
Keratella quadrata
,
Brachionus plicatilis
,
Evadne anonyx
,
Calanipeda aquaedulcis
,
Cyclops vicinus
)
and rotifers from the genus
Synchaeta
are
very abundant, ten species are less numerous and seven summer species very rare. Different zoobenthos species are present, but only four abundant (
Hediste diversicolor
,
Chironomus plumosus
,
Syndosmya segmentum
and
Cyprideis torosa
). Zoobenthos mainly consist of Polychaeta, Mollusca, Crustacea and Diptera. The highest diversity was found near the Kokaral dam. Many fish species are commercially important: 14 of them are abundant, including endemic bream
Abramis brama orientalis
,
Chalcalburnus
chalcoides aralensis
, carp
Cyprinus carpio aralensis
, and Aral roach
Rutilus rutilus aralensis
. White-eye bream
Abramis sapa aralensis
, silver carp
Hypophtalmichthys molitrix
, orfe
Leuciscus idus oxianus
, and snakehead
Channa argus warpachowskii
are less numerous. Aral barbel
Barbus brachycephalus brachycephalus
and Turkestan barbel
Barbus capito conocephalus
remain very rare. It can be concluded that significant positive changes occurred after Kokaral dam construction. Particularly, biocenoses and the Aral lake environment have been improved and fisheries returned. Today Kazakhstan Government is discussing an idea to improve this dam and dike and we support this discussion and advise to make it higher. All can lead to improve ecological state of the Small Aral.
Keywords
Aral Sea, biodiversity, ecological state, zooplankton, zoobenthos, fish |
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