The Experts below are selected from a list of 231 Experts worldwide ranked by ideXlab platform
Lyudmila D. Varbanets - One of the best experts on this subject based on the ideXlab platform.
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The effect of the plant Growth Stimulant bactozole on Rhizobium leguminosarum bv. viciae 250a and its nitrogen-tolerant mutant M-71 under varied nitrogen supply
Mikrobiologiia, 2003Co-Authors: L. V. Kosenko, E. D. Krugova, Lyudmila D. VarbanetsAbstract:The effect of the plant Growth Stimulant bactozole on the Growth of Rhizobium leguminosarum bv. viciae 250a and its nitrogen-tolerant mutant M-71 and the synthesis of extracellular carbohydrates was studied. At a low content of nitrate (6 mM) in the medium, all three bactozole concentrations tested (0.001, 0.01, and 0.1%) exerted similar stimulating effects on the Growth of the parent strain 250a (about 1.5-fold) and the synthesis of extracellular carbohydrates (about 2-fold). At a high content of nitrate (20 mM) in the medium, when the Growth of the parent strain and the synthesis of extracellular carbohydrates were inhibited, bactozole at all three concentrations exerted only a Growth-stimulating effect. At the same time, mutant M-71 showed better Growth at higher concentrations of bactozole, whereas the ability of the mutant to synthesize extracellular carbohydrates decreased with increasing bactozole concentration. The cell biomass of the mutant accumulated at 20 mM nitrate was 1.8-2.5 times greater than it was at 6 mM nitrate. Bactozole enhanced the symbiosis of legume plants with both parent and mutant strains, raising the mass of plants and enhancing nodulation and the nitrogen-fixing activity of root nodules. The symbiotic parameters of mutant M-71 were better (irrespective of whether bactozole was present or not) when its inoculum was grown at a high nitrogen content (20 mM nitrate), whereas the respective parameters of the parent strain were better when it was grown at 6 mM nitrate. The inference is made that the better physiological characteristics of the mutant in the high-nitrate medium is due to its higher nitrate reductase activity (as compared with the parent strain) in both the free-living state and in legume nodules.
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The Effect of the Plant Growth Stimulant Bactozole on Rhizobium leguminosarum bv. viciae 250a and Its Nitrogen-Tolerant Mutant M-71 under Different Nitrogen Supply Conditions
Microbiology, 2003Co-Authors: L. V. Kosenko, E. D. Krugova, N. M. Mandrovskaya, Lyudmila D. VarbanetsAbstract:The effect of the plant Growth Stimulant bactozole on the Growth of Rhizobium leguminosarum bv. viciae 250a and its nitrogen-tolerant mutant M-71 and the synthesis of extracellular carbohydrates was studied. At a low content of nitrate (6 mM) in the medium, all three bactozole concentrations tested (0.001, 0.01, and 0.1%) exerted similar stimulating effects on the Growth of the parent strain 250a (about 1.5-fold) and the synthesis of extracellular carbohydrates (about 2-fold). At a high content of nitrate (20 mM) in the medium, when the Growth of the parent strain and the synthesis of extracellular carbohydrates were inhibited, bactozole at all three concentrations exerted only a Growth-stimulating effect. At the same time, mutant M-71 showed better Growth at higher concentrations of bactozole, whereas the ability of the mutant to synthesize extracellular carbohydrates decreased with increasing bactozole concentration. The cell biomass of the mutant accumulated at 20 mM nitrate was 1.8–2.5 times greater than it was at 6 mM nitrate. Bactozole enhanced the symbiosis of legume plants with both parent and mutant strains, raising the mass of plants and enhancing nodulation and the nitrogen-fixing activity of root nodules. The symbiotic parameters of mutant M-71 were better (irrespective of whether bactozole was present or not) when its inoculum was grown at a high nitrogen content (20 mM nitrate), whereas the respective parameters of the parent strain were better when it was grown at 6 mM nitrate. The inference is made that the better physiological characteristics of the mutant in the high-nitrate medium are due to its higher nitrate reductase activity (as compared with the parent strain) in both the free-living state and in legume nodules.
Mariano Muniz - One of the best experts on this subject based on the ideXlab platform.
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effects of the plant Growth Stimulant sbpi on bemisia tabaci genn homoptera aleyrodidae
Spanish Journal of Agricultural Research, 2007Co-Authors: Azahara A Gomez, D Alonso, Gloria Nombela, Mariano MunizAbstract:The environmentally friendly plant Growth Stimulant and pesticide SB Plant Invigorator (SBPI, Stan Brouard Group) helps the plant to produce quality fruit. Three days after tomato plants were sprayed for the first time with SBPI (2 mL/L solution), this product seemed to be ineffective against Bemisia tabaci adults, as the numbers of dead females were practically equal on control and treated plants. After 3 days oviposition values on control plants did not differ significantly from those on treated plants. However, 31 days after the first treatment with weekly repeated treatments, new adult whiteflies started to emerge from pupae on control plants, but no L3, L4 or new adults were found on SBPI-treated plants. However, differences in the number of 1st+2nd instar larvae were not statistically significant. From these findings it can be concluded that, under these conditions, SBPI is an effective alternative product for the control of B. tabaci on tomato plants, as foliar application inhibits larval development decreasing the risk of a new whitefly generation.
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Short communication. Effects of the plant Growth Stimulant SBPI on Bemisia tabaci Genn. (Homoptera: Aleyrodidae)
Spanish Journal of Agricultural Research, 2007Co-Authors: Azahara A Gomez, D Alonso, Gloria Nombela, Mariano MunizAbstract:The environmentally friendly plant Growth Stimulant and pesticide SB Plant Invigorator (SBPI, Stan Brouard Group) helps the plant to produce quality fruit. Three days after tomato plants were sprayed for the first time with SBPI (2 mL/L solution), this product seemed to be ineffective against Bemisia tabaci adults, as the numbers of dead females were practically equal on control and treated plants. After 3 days oviposition values on control plants did not differ significantly from those on treated plants. However, 31 days after the first treatment with weekly repeated treatments, new adult whiteflies started to emerge from pupae on control plants, but no L3, L4 or new adults were found on SBPI-treated plants. However, differences in the number of 1st+2nd instar larvae were not statistically significant. From these findings it can be concluded that, under these conditions, SBPI is an effective alternative product for the control of B. tabaci on tomato plants, as foliar application inhibits larval development decreasing the risk of a new whitefly generation.
Tomoya Takahashi - One of the best experts on this subject based on the ideXlab platform.
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Procyanidin Oligomers Counteract TGF-β1- and TGF-β2-Induced Apoptosis in Hair Epithelial Cells: An Insight into Their Mechanisms
Skin pharmacology and physiology, 2006Co-Authors: A. Kamimura, Tomoya Takahashi, M. Morohashi, Y. TakanoAbstract:Procyanidin oligomers are polyphenol compounds we have identified in apples and barley which have hair Growth Stimulant effects, and which are able to promote hair epithelial cell Growth and induce an
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procyanidin b 3 isolated from barley and identified as a hair Growth Stimulant has the potential to counteract inhibitory regulation by tgf beta1
Experimental Dermatology, 2002Co-Authors: Ayako Kamimura, Tomoya TakahashiAbstract:With the aim of identifying natural products, which possess hair-growing activity, we examined more than 1000 plant extracts with respect to their Growth-promoting effects on hair epithelial cells. We discovered intensive Growth-promoting activity, about 140% relative to controls, in barley extract. Our strategy for identifying active compounds in barley extract involved subjecting it to column chromatography using HP-20 resin columns, an LH-20 resin column, and preparative high-performance liquid chromatography (HPLC) using an ODS column. The 60% (v/v) aqueous methanol eluted fraction from the HP-20 column and the 75% (v/v) aqueous methanol eluted fraction from the subsequent LH-20 column showed high hair-growing activity in vivo. We isolated two major substances from the LH-20 active fraction using preparative HPLC. By means of mass spectrometry, 1H-NMR, and 13C-NMR analyses, one substance was revealed to be procyanidin B-3 and the other substance was identified as (+)-catechin. Purified procyanidin B-3 showed high hair-growing activity in the form of in vitro hair epithelial cell Growth-promoting activity and in vivo anagen-inducing activity; however (+)-catechin showed no hair-growing activity. For the purpose of examining the hair-growing mechanisms of procyanidin B-3, we examined its relationship to the TGF-beta signal pathway, which is known to be a regulator of catagen induction. Addition of TGF-beta1 to hair epithelial cell cultures dose-dependently decreased the cell Growth, and addition of procyanidin B-3 to the culture neutralized the Growth-inhibiting effect of TGF-beta1. From these results, it is concluded that procyanidin B-3 can directly promote hair epithelial cell Growth in vitro, has the potential to counteract the Growth-inhibiting effect caused by TGF-beta1 in vitro, and has potential to stimulate anagen induction in vivo.
L. V. Kosenko - One of the best experts on this subject based on the ideXlab platform.
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The effect of the plant Growth Stimulant bactozole on Rhizobium leguminosarum bv. viciae 250a and its nitrogen-tolerant mutant M-71 under varied nitrogen supply
Mikrobiologiia, 2003Co-Authors: L. V. Kosenko, E. D. Krugova, Lyudmila D. VarbanetsAbstract:The effect of the plant Growth Stimulant bactozole on the Growth of Rhizobium leguminosarum bv. viciae 250a and its nitrogen-tolerant mutant M-71 and the synthesis of extracellular carbohydrates was studied. At a low content of nitrate (6 mM) in the medium, all three bactozole concentrations tested (0.001, 0.01, and 0.1%) exerted similar stimulating effects on the Growth of the parent strain 250a (about 1.5-fold) and the synthesis of extracellular carbohydrates (about 2-fold). At a high content of nitrate (20 mM) in the medium, when the Growth of the parent strain and the synthesis of extracellular carbohydrates were inhibited, bactozole at all three concentrations exerted only a Growth-stimulating effect. At the same time, mutant M-71 showed better Growth at higher concentrations of bactozole, whereas the ability of the mutant to synthesize extracellular carbohydrates decreased with increasing bactozole concentration. The cell biomass of the mutant accumulated at 20 mM nitrate was 1.8-2.5 times greater than it was at 6 mM nitrate. Bactozole enhanced the symbiosis of legume plants with both parent and mutant strains, raising the mass of plants and enhancing nodulation and the nitrogen-fixing activity of root nodules. The symbiotic parameters of mutant M-71 were better (irrespective of whether bactozole was present or not) when its inoculum was grown at a high nitrogen content (20 mM nitrate), whereas the respective parameters of the parent strain were better when it was grown at 6 mM nitrate. The inference is made that the better physiological characteristics of the mutant in the high-nitrate medium is due to its higher nitrate reductase activity (as compared with the parent strain) in both the free-living state and in legume nodules.
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The Effect of the Plant Growth Stimulant Bactozole on Rhizobium leguminosarum bv. viciae 250a and Its Nitrogen-Tolerant Mutant M-71 under Different Nitrogen Supply Conditions
Microbiology, 2003Co-Authors: L. V. Kosenko, E. D. Krugova, N. M. Mandrovskaya, Lyudmila D. VarbanetsAbstract:The effect of the plant Growth Stimulant bactozole on the Growth of Rhizobium leguminosarum bv. viciae 250a and its nitrogen-tolerant mutant M-71 and the synthesis of extracellular carbohydrates was studied. At a low content of nitrate (6 mM) in the medium, all three bactozole concentrations tested (0.001, 0.01, and 0.1%) exerted similar stimulating effects on the Growth of the parent strain 250a (about 1.5-fold) and the synthesis of extracellular carbohydrates (about 2-fold). At a high content of nitrate (20 mM) in the medium, when the Growth of the parent strain and the synthesis of extracellular carbohydrates were inhibited, bactozole at all three concentrations exerted only a Growth-stimulating effect. At the same time, mutant M-71 showed better Growth at higher concentrations of bactozole, whereas the ability of the mutant to synthesize extracellular carbohydrates decreased with increasing bactozole concentration. The cell biomass of the mutant accumulated at 20 mM nitrate was 1.8–2.5 times greater than it was at 6 mM nitrate. Bactozole enhanced the symbiosis of legume plants with both parent and mutant strains, raising the mass of plants and enhancing nodulation and the nitrogen-fixing activity of root nodules. The symbiotic parameters of mutant M-71 were better (irrespective of whether bactozole was present or not) when its inoculum was grown at a high nitrogen content (20 mM nitrate), whereas the respective parameters of the parent strain were better when it was grown at 6 mM nitrate. The inference is made that the better physiological characteristics of the mutant in the high-nitrate medium are due to its higher nitrate reductase activity (as compared with the parent strain) in both the free-living state and in legume nodules.
Azahara A Gomez - One of the best experts on this subject based on the ideXlab platform.
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effects of the plant Growth Stimulant sbpi on bemisia tabaci genn homoptera aleyrodidae
Spanish Journal of Agricultural Research, 2007Co-Authors: Azahara A Gomez, D Alonso, Gloria Nombela, Mariano MunizAbstract:The environmentally friendly plant Growth Stimulant and pesticide SB Plant Invigorator (SBPI, Stan Brouard Group) helps the plant to produce quality fruit. Three days after tomato plants were sprayed for the first time with SBPI (2 mL/L solution), this product seemed to be ineffective against Bemisia tabaci adults, as the numbers of dead females were practically equal on control and treated plants. After 3 days oviposition values on control plants did not differ significantly from those on treated plants. However, 31 days after the first treatment with weekly repeated treatments, new adult whiteflies started to emerge from pupae on control plants, but no L3, L4 or new adults were found on SBPI-treated plants. However, differences in the number of 1st+2nd instar larvae were not statistically significant. From these findings it can be concluded that, under these conditions, SBPI is an effective alternative product for the control of B. tabaci on tomato plants, as foliar application inhibits larval development decreasing the risk of a new whitefly generation.
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Short communication. Effects of the plant Growth Stimulant SBPI on Bemisia tabaci Genn. (Homoptera: Aleyrodidae)
Spanish Journal of Agricultural Research, 2007Co-Authors: Azahara A Gomez, D Alonso, Gloria Nombela, Mariano MunizAbstract:The environmentally friendly plant Growth Stimulant and pesticide SB Plant Invigorator (SBPI, Stan Brouard Group) helps the plant to produce quality fruit. Three days after tomato plants were sprayed for the first time with SBPI (2 mL/L solution), this product seemed to be ineffective against Bemisia tabaci adults, as the numbers of dead females were practically equal on control and treated plants. After 3 days oviposition values on control plants did not differ significantly from those on treated plants. However, 31 days after the first treatment with weekly repeated treatments, new adult whiteflies started to emerge from pupae on control plants, but no L3, L4 or new adults were found on SBPI-treated plants. However, differences in the number of 1st+2nd instar larvae were not statistically significant. From these findings it can be concluded that, under these conditions, SBPI is an effective alternative product for the control of B. tabaci on tomato plants, as foliar application inhibits larval development decreasing the risk of a new whitefly generation.
