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Boris Vyskot - One of the best experts on this subject based on the ideXlab platform.
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Dioecious Silene latifolia plants show sexual dimorphism in the Vegetative Stage
BMC Plant Biology, 2010Co-Authors: Jitka Zluvova, Jiri Zak, Bohuslav Janousek, Boris VyskotAbstract:BackgroundPrior to this study, no differences in gene expression between male and female dioecious plants in the Vegetative state had been detected. Among dioecious plants displaying sexual dimorphism, Silene latifolia is one of the most studied species. Although many sexually dimorphic traits have been described in S. latifolia, all of them are quantitative, and they usually become apparent only after the initiation of flowering.ResultsWe present RT-PCR-based evidence that in S. latifolia, sexual dimorphism in gene expression is present long before the initiation of flowering. We describe three ESTs that show sex-specific (two male specific and one female specific) transcription at the rosette Stage before the first flowering season.ConclusionsTo our knowledge, this study provides the first molecular evidence of early pre-flowering sexual dimorphism in angiosperms.
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dioecious silene latifolia plants show sexual dimorphism in the Vegetative Stage
BMC Plant Biology, 2010Co-Authors: Jitka Zluvova, Jiri Zak, Bohuslav Janousek, Boris VyskotAbstract:Prior to this study, no differences in gene expression between male and female dioecious plants in the Vegetative state had been detected. Among dioecious plants displaying sexual dimorphism, Silene latifolia is one of the most studied species. Although many sexually dimorphic traits have been described in S. latifolia, all of them are quantitative, and they usually become apparent only after the initiation of flowering. We present RT-PCR-based evidence that in S. latifolia, sexual dimorphism in gene expression is present long before the initiation of flowering. We describe three ESTs that show sex-specific (two male specific and one female specific) transcription at the rosette Stage before the first flowering season. To our knowledge, this study provides the first molecular evidence of early pre-flowering sexual dimorphism in angiosperms.
Jitka Zluvova - One of the best experts on this subject based on the ideXlab platform.
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Dioecious Silene latifolia plants show sexual dimorphism in the Vegetative Stage
BMC Plant Biology, 2010Co-Authors: Jitka Zluvova, Jiri Zak, Bohuslav Janousek, Boris VyskotAbstract:BackgroundPrior to this study, no differences in gene expression between male and female dioecious plants in the Vegetative state had been detected. Among dioecious plants displaying sexual dimorphism, Silene latifolia is one of the most studied species. Although many sexually dimorphic traits have been described in S. latifolia, all of them are quantitative, and they usually become apparent only after the initiation of flowering.ResultsWe present RT-PCR-based evidence that in S. latifolia, sexual dimorphism in gene expression is present long before the initiation of flowering. We describe three ESTs that show sex-specific (two male specific and one female specific) transcription at the rosette Stage before the first flowering season.ConclusionsTo our knowledge, this study provides the first molecular evidence of early pre-flowering sexual dimorphism in angiosperms.
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dioecious silene latifolia plants show sexual dimorphism in the Vegetative Stage
BMC Plant Biology, 2010Co-Authors: Jitka Zluvova, Jiri Zak, Bohuslav Janousek, Boris VyskotAbstract:Prior to this study, no differences in gene expression between male and female dioecious plants in the Vegetative state had been detected. Among dioecious plants displaying sexual dimorphism, Silene latifolia is one of the most studied species. Although many sexually dimorphic traits have been described in S. latifolia, all of them are quantitative, and they usually become apparent only after the initiation of flowering. We present RT-PCR-based evidence that in S. latifolia, sexual dimorphism in gene expression is present long before the initiation of flowering. We describe three ESTs that show sex-specific (two male specific and one female specific) transcription at the rosette Stage before the first flowering season. To our knowledge, this study provides the first molecular evidence of early pre-flowering sexual dimorphism in angiosperms.
Jiri Zak - One of the best experts on this subject based on the ideXlab platform.
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Dioecious Silene latifolia plants show sexual dimorphism in the Vegetative Stage
BMC Plant Biology, 2010Co-Authors: Jitka Zluvova, Jiri Zak, Bohuslav Janousek, Boris VyskotAbstract:BackgroundPrior to this study, no differences in gene expression between male and female dioecious plants in the Vegetative state had been detected. Among dioecious plants displaying sexual dimorphism, Silene latifolia is one of the most studied species. Although many sexually dimorphic traits have been described in S. latifolia, all of them are quantitative, and they usually become apparent only after the initiation of flowering.ResultsWe present RT-PCR-based evidence that in S. latifolia, sexual dimorphism in gene expression is present long before the initiation of flowering. We describe three ESTs that show sex-specific (two male specific and one female specific) transcription at the rosette Stage before the first flowering season.ConclusionsTo our knowledge, this study provides the first molecular evidence of early pre-flowering sexual dimorphism in angiosperms.
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dioecious silene latifolia plants show sexual dimorphism in the Vegetative Stage
BMC Plant Biology, 2010Co-Authors: Jitka Zluvova, Jiri Zak, Bohuslav Janousek, Boris VyskotAbstract:Prior to this study, no differences in gene expression between male and female dioecious plants in the Vegetative state had been detected. Among dioecious plants displaying sexual dimorphism, Silene latifolia is one of the most studied species. Although many sexually dimorphic traits have been described in S. latifolia, all of them are quantitative, and they usually become apparent only after the initiation of flowering. We present RT-PCR-based evidence that in S. latifolia, sexual dimorphism in gene expression is present long before the initiation of flowering. We describe three ESTs that show sex-specific (two male specific and one female specific) transcription at the rosette Stage before the first flowering season. To our knowledge, this study provides the first molecular evidence of early pre-flowering sexual dimorphism in angiosperms.
Bohuslav Janousek - One of the best experts on this subject based on the ideXlab platform.
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Dioecious Silene latifolia plants show sexual dimorphism in the Vegetative Stage
BMC Plant Biology, 2010Co-Authors: Jitka Zluvova, Jiri Zak, Bohuslav Janousek, Boris VyskotAbstract:BackgroundPrior to this study, no differences in gene expression between male and female dioecious plants in the Vegetative state had been detected. Among dioecious plants displaying sexual dimorphism, Silene latifolia is one of the most studied species. Although many sexually dimorphic traits have been described in S. latifolia, all of them are quantitative, and they usually become apparent only after the initiation of flowering.ResultsWe present RT-PCR-based evidence that in S. latifolia, sexual dimorphism in gene expression is present long before the initiation of flowering. We describe three ESTs that show sex-specific (two male specific and one female specific) transcription at the rosette Stage before the first flowering season.ConclusionsTo our knowledge, this study provides the first molecular evidence of early pre-flowering sexual dimorphism in angiosperms.
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dioecious silene latifolia plants show sexual dimorphism in the Vegetative Stage
BMC Plant Biology, 2010Co-Authors: Jitka Zluvova, Jiri Zak, Bohuslav Janousek, Boris VyskotAbstract:Prior to this study, no differences in gene expression between male and female dioecious plants in the Vegetative state had been detected. Among dioecious plants displaying sexual dimorphism, Silene latifolia is one of the most studied species. Although many sexually dimorphic traits have been described in S. latifolia, all of them are quantitative, and they usually become apparent only after the initiation of flowering. We present RT-PCR-based evidence that in S. latifolia, sexual dimorphism in gene expression is present long before the initiation of flowering. We describe three ESTs that show sex-specific (two male specific and one female specific) transcription at the rosette Stage before the first flowering season. To our knowledge, this study provides the first molecular evidence of early pre-flowering sexual dimorphism in angiosperms.
Zdenko Rengel - One of the best experts on this subject based on the ideXlab platform.
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differential sulfur efficiency in canola genotypes at Vegetative and grain maturity Stage
Crop & Pasture Science, 2009Co-Authors: Tatjana Balint, Zdenko RengelAbstract:The breeding process can be facilitated if sulfur efficiency in canola at maturity can be reliably determined by screening germplasm in the Vegetative Stage. Twelve canola genotypes chosen from a preliminary screening study with either high or low S efficiency indices were tested for consistency in S efficiency between Vegetative Stage and maturity. Plants were grown under glasshouse conditions using low or adequate S supply. The criteria for efficiency assessment at the Vegetative Stage were: shoot biomass at deficient S supply, relative biomass production, and S utilisation efficiency. Considering these three criteria of S efficiency, only one canola genotype was classified as efficient (Surpass 402 CL). Three genotypes were classified as inefficient under two criteria: genotypes IB 1337 and Surpass 300 TT for relative biomass production at low S supply and S-utilisation efficiency, and IB 1368 for biomass production and relative biomass production. In addition to seed yield, relative seed yield, and S utilisation, four additional efficiency criteria were used for the maturity Stage: harvest index, S harvest index, and oil and protein concentrations in the seed. For all efficiency criteria used, highly significant genotypic differences existed. IB 1368 was ranked efficient under all criteria. Genotypes Surpass 402 CL and 46C74 were ranked inefficient at maturity but efficient at the Vegetative Stage. In conclusion, screening canola germplasm for S efficiency requires an assessment of the efficiency at maturity rather than during Vegetative growth.
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Nitrogen efficiency of canola genotypes varies between Vegetative Stage and grain maturity
Euphytica, 2008Co-Authors: Tatjana Balint, Zdenko RengelAbstract:There is no information on whether N efficiency in canola at maturity can be reliably determined by screening germplasm in the Vegetative Stage. Twelve canola genotypes identified in preliminary screening study as having either high or low N efficiency indices were tested for consistency in N efficiency between the Vegetative Stage and maturity. Plants were grown in a glasshouse under low or adequate N supply and N efficiency was assessed using the following criteria: dry weight at deficient N supply, relative yield at low vs. adequate N supply, and N utilisation efficiency. None of the 12 tested genotypes was classified as efficient or inefficient under all three criteria. One genotype (46C74) was classified as efficient under two criteria, and one genotype (Surpass 300 TT) was inefficient under two criteria. At maturity, three additional efficiency criteria were used: harvest index, N harvest index, and oil and protein concentration in seed. Two genotypes (Wesway and 46C74) (ranked as efficient at Vegetative Stage) remained efficient at maturity under most of the efficiency criteria used. On the other hand, genotype Surpass 603 CL ranked inefficient during the Vegetative Stage was ranked as efficient at maturity under two criteria. Overall, there was little consistency in the N efficiency ranking between Vegetative Stage and maturity in 12 tested genotypes. Screening canola germplasm for N efficiency for breeding purposes would therefore require an assessment at maturity.
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canola cultivars differ in nitrogen utilization efficiency at Vegetative Stage
Field Crops Research, 2006Co-Authors: Zlatko Svecnjak, Zdenko RengelAbstract:Previous research indicated genotype-specific responses in nitrogen utilization efficiency (NUE) for oilseed rape (Brassica napus L.), but mechanisms behind those differences are unknown. Our objective was to determine whether cultivar variations in NUE (dry matter production per unit of N absorbed) could be related to the differences in N and nitrate uptake and partitioning. Four Australian spring canola cultivars (Eyre, Charlton, Pinnacle and Rainbow) were grown in glasshouse under conditions of low- and high-N supply. All cultivars were at the same growth Stage when harvested 60 days after sowing (rosette Stage with five leaves at low-N supply and nine leaves at high-N supply). Cultivars significantly differed in total N uptake in roots and shoots, but not when the whole plants were considered. Although all cultivars had similar total N uptake per plant, significant differences in NUE existed because of differences in plant biomass. N-efficient cultivars Charlton and Rainbow produced larger plant biomass and had lower N concentration in various aboveground plant parts (including dead leaves) than N-inefficient cultivars Pinnacle and Eyre. Nitrogen concentration in roots did not differ significantly among cultivars. Regardless of N supply, N concentrations in various plant parts were in the order: young blades > old blades > roots > young petioles > stems > old petioles > dead leaves. No significant variation in nitrate-N concentration in roots or various aboveground plant parts was found among tested cultivars. The absence of cultivar × N treatment interaction for plant dry weight, N concentration, N uptake, and consequently NUE, clearly indicated that cultivars that performed best at high-N supply also showed similar responses under N-deficient conditions. Despite similar total N uptake per plant, significant differences in NUE existed because more N-efficient cultivars produced larger plant biomass and tended to have lower N concentrations in all plant parts (except roots) compared with less N-efficient cultivars.
