...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plant and Soil >Biomass accumulation and allocation in soybean associated with genotypic differences in tolerance of nitrogen fixation to water deficits.
【24h】

Biomass accumulation and allocation in soybean associated with genotypic differences in tolerance of nitrogen fixation to water deficits.

机译：大豆中生物量的积累和分配与固氮对水分亏缺的耐受性的基因型差异有关。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An initial greenhouse experiment compared biomass and N accumulation in soyabeans cv. Jackson, Biloxi, KS4895, D68-0102, PI416937 and SCE82-303 during an 8-day water deficit. Low stress intensity minimized genotypic expression of water-deficit tolerance, Jackson being a tolerant genotype. A further experiment compared Jackson to SCE82-303 at more severe stress levels. Biomass and N accumulation continued during water deficits in Jackson, but ceased in SCE82-303, while individual nodule mass tendedto increase during water deficits in Jackson, but decreased in SCE82-303. It is suggested that a greater allocation of photosynthate to the nodules occurred in Jackson in response to water deficits. Biomass accumulation was compared between Jackson and the USDA plant introduction (PI) 416937, which had also demonstrated tolerance to water deficits. Under water deficit treatments, total biomass accumulation was negligible for PI416937, while biomass accumulation continued at 64% of the control treatmentfor Jackson. Transpirational losses for Jackson and PI416937 were not significantly different under water stress conditions, and it is suggested that Jackson exhibited higher water use efficiency (WUE). Isotopic discrimination of 13C and 12C also indicated that Jackson exhibited greater WUE during water stress conditions. 14C allocation in Jackson was compared with KS4895 (a water stress sensitive cultivar). Jackson exported significantly greater amounts of 14C from labelled leaves and allocated ? times as much 14C/g of nodule. It is suggested that sustained biomass production in Jackson during water deficits resulted in the continued allocation of photosynthate to nodules and prolonged nitrogenase activity.
机译：最初的温室实验比较了大豆简历中的生物量和氮积累。缺水8天期间，杰克逊，比洛克西，KS4895，D68-0102，PI416937和SCE82-303。低胁迫强度使缺水耐性的基因型表达最小化，杰克逊是耐性基因型。进一步的实验将杰克逊与SCE82-303在更严重的压力水平下进行了比较。在杰克逊缺水期间，生物量和氮积累持续，但在SCE82-303中停止了，而在杰克逊缺水期间，单个结节质量趋于增加，而在SCE82-303中下降。建议在杰克逊地区，由于缺水，光合作用分配给结节的程度更大。在杰克逊和美国农业部植物引种（PI）416937之间比较了生物量的积累，该研究还证明了对水分亏缺的耐受性。在缺水处理下，PI416937的总生物量累积可忽略不计，而对于Jackson而言，生物量累积继续占对照处理的64％。在水分胁迫条件下，Jackson和PI416937的蒸腾损失没有显着差异，这表明Jackson表现出更高的水分利用效率（WUE）。 13 C和12 C的同位素判别也表明，杰克逊在水分胁迫条件下表现出更高的WUE。将杰克逊州14C分配与KS4895（水分胁迫敏感品种）进行了比较。杰克逊从贴有标签的叶子中出口了大量的14C并分配了？结节的14倍/克。这表明杰克逊缺水期间持续的生物量生产导致光合产物向根瘤的持续分配并延长了固氮酶的活性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号