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Buletinul AŞM. Ştiinţele vieţii. Nr. 2 (317) 2012<br />
ABSTRACTS<br />
Abstracts<br />
UDC: 639.21/.31.09:502.5(204)(478)<br />
PENETRATION WAYS AND EXPANSION RATE OF THE INVASIVE FISH<br />
SPECIES IN THE REPUBLIC OF MOLDOVA ECOSYSTEMS. Bulat Dm, Bulat Dn,<br />
Toderaş I, Toderaş Lidia, Usatîi M, Railean Nadejda. // Buletinul Academiei de Ştiinţe a Moldovei.<br />
Ştiinţele vieţii. 2012, No 2 (317), p. 16-27.<br />
This paper deals with the problem of the species invasion that is likely to be of both allogenic<br />
and native origin due to the rapid changes of the habit factor values. The highest expansion<br />
rate and negative effect on the aquatic ecosystem functionality caused by four invasive<br />
and naturalized fi sh species, Prussian carp, stone morocco, pumpkinseed, Chinese sleeper, have<br />
been found in the Republic of Moldova. Of 15 fi sh species introduced in pisciculture at different<br />
times, only three species, silver carp, bighead carp, and carp are presently employed at a large<br />
scale. Their share has signifi cantly raised in the natural ecosystems as a result of the greater<br />
2008 and 2010 spring fl oods.<br />
22 References, 1 table<br />
Key words: aquatic ecosystem - invasive and naturalized fi sh species - expansion rate - hydrobionts<br />
acclimation - numerical regress - ecological and economic impact.<br />
Received May 28, 2012<br />
UDC: 633.854.78:631.52<br />
FERTILITY RESTORATION GENES IN DIFFERENT CULTIVATED PLANTS.<br />
Duca Maria, Port Angela, Nechifor Victoria. // Buletinul Academiei de Ştiinţe a Moldovei.<br />
Ştiinţele vieţii. 2012, No 2 (317), p. 28-37.<br />
Cytoplasmic male sterility and its fertility restoration genes are critical tools for hybrid seed<br />
production to utilize heterosis. It was reviewed literature on restorer genes heredity, structural<br />
and biochemical features, the restorer effects on mitochondrial gene expression. Nuclear restorers<br />
differ, even within species, in their molecular action, with some targeting only the mRNA<br />
transcripts of the CMS genes that they counteract and others also affecting transcripts of essential<br />
mitochondrial genes.<br />
56 references, 2 fi gures, 1 table.<br />
Key words: Fertility restoration genes - cytoplasmic male sterility – sunfl ower - gene expression.<br />
Received April 26, 2012<br />
UDC: 611.013.12+612.616.2<br />
CRYOLABILITY OF THE COCK SPERM MORPHOPHYSIOLOGICAL STATUS<br />
AND RESISTANCE DIVERSITY. Balan I. // Buletinul Academiei de Ştiinţe a Moldovei.<br />
Ştiinţele vieţii. 2012, No 2 (317), p. 37-47.<br />
The current studies on the morphofunctional state of the reproductive system and spermatogenesis<br />
are justifi ed by an abrupt decrease of spermogram indices. The fi ndings revealed<br />
damages in the cell structures at different technological stages of sperm cryopreservation. The<br />
variation degrees of the cock sperm resistance to the action of the physicochemical factors<br />
required for sperm manipulation have been determined.<br />
41 references, 4 tables<br />
Key words: sperm material – acrosome – cryopreservation - pathologic spermatozoa - thermal<br />
shock - osmotic resistance - teratogenic index-B.<br />
Received June 21, 2012<br />
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