scholarly journals ВПЛИВ РЕГУЛЯТОРУ РОСТУ ЗА УМОВ ДІЇ АНТРОПОГЕННИХ ЧИННИКІВ ДОВКІЛЛЯ

Author(s):  
O. M. Vasilyuk

<p>The paper analyses the general (GА, nM pyruvic acid/ml∙second) and specific (SA, nM pyruvic acid /mg second) transferase enzyme activity of protein metabolism (Аlanine aminotransferase ALT, EC 2.6.1.2, and Аspartate aminotransferase, AST, EC 2.6.1.1) in <em>Salix alba</em> L. leaves, that planted on the banks of Mokra Sura River (anthropogenic polluted, increased level of salinity) and Shpakova River (relatively clean, control) which are parts of Dnipro River Basin of Steppe Dnipro Region. We used the plant growth regulator “Kornevin” in order to accelerate rooting and reducing of exogenous pressures on the plant. We registered the Aminotransferase nonspecific reaction towards anthropogenic pressure, which was associated with the formation of non-specific mechanisms of adaptation to support the homeostasis. We revealed the significant differences between experiment and control in index of protein synthesis and metabolism depending on the conditions of growth and development. Protective and leveling effects of growth regulator have been proved. The advisability of using the "Kornevin" as an adaptogene and a protector in variable environmental conditions have been indicated.</p><p><em>Salix alba L., increased level of salinity, growth regulators, alaninaminotransferase, aspartataminotransferase, adaptogene, anthropogenic factors</em><em></em></p>

Author(s):  
O. M. Vasilyuk

<p>The effect of increasing salinity to the morpho-metric parameters of Salix alba L., which dominated in the coastal areas on rivers of Steppe Dnieper, is investigated. We added Mg as salt MgSO<sub>4</sub> * 3H<sub>2</sub>O in the range of concentration: 0.5, 1.0, 1.5, 2.0 and 2.5 g/l in a solution of willow cuttings. In the solution was added and plant growth regulator "Kornevin" the synthetic origin. The negative effect of salt at a concentration from 1.0 g/l to 2.5 g/l in the dynamics of growth and development was found. The correlation between the size and salinity in dynamics of growth and development of plant were demonstrated: in the growth of shoots (R = 0.83, 0.91 and 0.95), in the growth of roots (R = 0.92, 0.68 and 0.84) respectively depended from salt concentration. The length of the leaf blade was from 4% to 8%, from 7% to 43%, from 333% to 11% (R = 0,68, 0,93, 0,61), depending on the concentration of salt and during observing compared with control (distilled water). "Kornevin" and combined effect of salt increased the length of the leaf blade growth by 4-5, 2-4, 3-5 times, the roots by7 and 3-14 times, the shoots by 3-4, 6-7 and 5-7 times in the dynamics of growth compared with control (MgSO<sub>4</sub>, 2,5 g/l).</p> <p>The recommendations regarding for the advisability of using the plant growth regulator "Kornevin", as very effective plant growth preparation that promoted rooting and activated physiological processes of plant organism, expressed protective effect in conditions of excessive salinity, were provided.</p> <p class="Style1"><em>Key words</em><em>:</em><em> </em><em>the morpho-metric index, the plant growth regulators, abiotic factors, salinity factor, the adaptation.</em><em></em></p>


Author(s):  
O. M. Vasilyuk

The paper presents analysis of general (GА, Px, ΔЕ, ml∙sec) and specific (SA, Px, ΔЕ, mg∙sec) of oxidoreductase enzyme activity (Peroxidase, Px, EC 1.11.1.7), which together with Catalase (Cat, EC 1.11.1.6) forms a double link antioxidant protection of cells in the organisms of different levels of organization (non-specific response to stress) in the conditions of increasing redox processes under the exogenous stress. These markers of changeable environmental factors were sampled in the leaves of Salix alba L., which grew along Mokra Sura River (anthropogenically polluted with high level of salinity, experiment) and Shpakova River (without anthropogenic impact, control). These rivers belong to the basin of the Dnieper River (Steppe Dnieper region) that has high industrial load. We used plant growth regulator "Kornevin" in order to accelerate the rooting and reduce the exogenous pressures on the plants. We detected nonspecific reaction towards peroxidase in anthropogenic pressure conditions and determined significant differences between experiment and control regards antioxidant protection depending on growth and development conditions.


1996 ◽  
Vol 10 (4) ◽  
pp. 851-855
Author(s):  
C. Dale Monks ◽  
Michael G. Patterson ◽  
Malcolm Pegues

Field experiments were conducted in Alabama from 1992 through 1994 to evaluate the potential of the methyl ester of bensulfuron applied at sublethal rates as a plant growth regulator for reducing plant height and boll rot in cotton. Bensulfuron at 0.017 and 0.034 g ai/ha or mepiquat chloride at 10 g ai/ha was applied POST alone at the pinhead square or early-bloom stage of cotton growth or sequentially at 0.017 followed by (fb) 0.017 g/ha, 0.034 fb 0.034 g/ha of bensulfuron and 5 fb 5, 10 fb 10, 10 fb 20, or 20 fb 20 g/ha of mepiquat chloride. Mepiquat chloride had no effect on yield in 1992 and 1994 but decreased yield when applied sequentially in 1993. Bensulfuron was generally detrimental to first position fruit retention, and it delayed maturity. Treatments that reduced plant height did not reduce boll rot. Bensulfuron treatments that reduced plant height also reduced yield; therefore, the potential for its use as a growth regulator in cotton appears limited.


1992 ◽  
Vol 72 (4) ◽  
pp. 1153-1156 ◽  
Author(s):  
K. J. Kirkland

A 3-yr field experiment was conducted at the Scott Experimental Farm to determine the effect of the growth regulator, triapenthenol, on the growth and development of Argentine canola (Brassica napus L.). Triapenthenol reduced plant height 25–45 cm under optimal growing conditions. Increases in yield, branches and total pods were observed. Application at the bud stage was more effective than earlier treatment in the rosette. It was concluded that triapenthenol application to canola could be a useful management tool, particularly under optimal growing conditions.Key words: Canola, growth regulator, RSW-0411, lodging


1999 ◽  
Vol 13 (4) ◽  
pp. 829-834 ◽  
Author(s):  
Gregory E. Bell ◽  
Edward Odorizzi ◽  
T. Karl Danneberger

Two field studies, a seeded study and a golf course study, were conducted to compare competition among creeping bentgrass, annual bluegrass, and roughstalk bluegrass when subjected to common weed control practices and foliar applications of iron and magnesium. A research site was selected for the seeded study and divided into 10 whole plots receiving irrigation at either 50 or 100% evapotranspiration deficit. Each whole plot was further divided into subplots receiving one of seven treatments: bensulide, ethofumesate, trinexapac-ethyl, foliar Mg, foliar Fe, foliar Mg plus foliar Fe, and control. The site was seeded to a mixture of creeping bentgrass, annual bluegrass, and roughstalk bluegrass in September 1995, and treatments began in March 1996. Annual bluegrass was reduced 29% in plots treated with foliar Fe and 65% in plots treated with foliar Fe plus foliar Mg. Roughstalk bluegrass was significantly reduced in seeded plots treated with foliar iron (50%), plant growth regulator (75%), and foliar iron plus foliar magnesium (100%). Annual bluegrass and roughstalk bluegrass proportions were not affected by irrigation regime. In a second study, the most effective treatment, foliar magnesium plus foliar iron, was tested on a working golf course fairway and on a practice putting green beginning April 1997 and ending November 1997. Treatments on the golf course fairway and practice putting green were ineffective due to the established, perennial nature of the annual bluegrass biotypes on these sites. Further research is required to improve the efficacy of nutritional treatments on these perennials.


1996 ◽  
Vol 31 (1) ◽  
pp. 112-122
Author(s):  
Hollis M. Flint ◽  
Joseph E. Leggett ◽  
LeAnne Elhoff ◽  
Nancy J. Parks ◽  
Elizabeth W. Davidson

Cotton, Gossypium hirsutum L., plants were treated with the plant growth regulator mepiquat chloride (Pix™) in greenhouse and field plot tests to determine its effect on infestations of the silverleaf whitefly, Bemisia argentifolii Bellows and Perring. In the greenhouse, Pix-treated plants were significantly shorter and had thicker leaves than untreated plants by the end of the second week following application. Most of the Pix treatments caused significant reductions in adults, eggs and nymphs on leaves by fourth and final week of the test. In a separate test, leaf water potentials were equal for Pix-treated and well-watered plants which were significantly lower than for water-stressed and control plants. Pix-treated plants in two field plot tests showed the same changes in plant morphology observed in Pix-treated plants in the greenhouse. However, leaf water potentials were the same as in untreated plants and no reductions in whitefly infestations were found during the 6 to 7 wk test periods. Pix-treated plants in a third field plot test showed no changes in plant morphology or in whitefly infestations. The reduced whitefly infestations of Pix-treated plants in the greenhouse, but not in field plots, may have been due to reduced leaf water potentials in Pix-treated greenhouse plants but not in field plants.


2007 ◽  
Vol 35 (2) ◽  
pp. 993-996 ◽  
Author(s):  
Sulejman Redžepović ◽  
Sanja Sikora ◽  
Josip Čolo ◽  
Mihaela Blažinkov ◽  
Marija Pecina

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