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首页> 外文期刊>Journal of Experimental Botany >Phytoglobin overexpression promotes barley growth in the presence of enhanced level of atmospheric nitric oxide
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Phytoglobin overexpression promotes barley growth in the presence of enhanced level of atmospheric nitric oxide

机译：植物蛋白过度表达促进大麦生长在增强的大气一氧化氮水平上

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摘要

To investigate the effect of high atmospheric NO concentrations on crop plants and the role of phytoglobins under these conditions, we performed a long-term study on barley 'Golden Promise' wild type (WT), class 1 phytoglobin knockdown (HvPgb1.1-) and class 1 phytoglobin overexpression (HvPgb1.1+) lines. Plants were cultivated with nitrogen-free nutrient solution during the entire growth period and were fumigated with different NO concentration (ambient, 800, 1500, and 3000 ppb). Analysis of fresh weight, stem number, chlorophyll content, and effective quantum yield of PSII showed that NO fumigation promoted plant growth and tillering significantly in the HvPgb1.1+ line. After 80 d of NO fumigation, dry matter weight, spikes number, kernel number, and plant kernel weight were significantly increased in HvPgb1.1+ plants with increasing NO concentration. In contrast, yield decreased in WT and HvPgb1.1- plants the higher the NO level. Application of atmospheric (NO)-N-15 and (NO2)-N-15 demonstrated NO specificity of phytoglobins. N-15 from (NO)-N-15 could be detected in RNA, DNA, and proteins of barley leaves and the N-15 levels were significantly higher in HvPgb1.1+ plants in comparison with HvPgb1.1- and WT plants. Our results demonstrate that overexpression of phytoglobins allows plants to more efficiently use atmospheric NO as N source.
机译：为了探讨高大气不浓度对作物植物的影响以及植物植物在这些条件下的作用，我们对大麦'金色承诺'野生型（WT）进行了长期研究，1级植物植物敲低（HVPGB1.1-）和1类植物植物过表达（HVPGB1.1 +）线。在整个生长期间用无氮营养溶液培养植物，浓缩不浓度（环境，800,1500和3000ppb）。 PSII的新鲜重量，茎数，叶绿素含量和有效量子产率分析表明，在HVPGB1.1 +线上没有熏蒸促进植物生长和分蘖。在HVPGB1.1 +植物中80 d无熏蒸，干物质重量，尖峰数，粒数，籽粒重量显着增加，不浓度。相比之下，WT和HVPGB1.1的产量降低，植物越高，无水平越高。大气（NO）-N-15和（NO2）-N-15的施用证明了植物植物的特异性。在RNA，DNA和大麦叶片的RNA，DNA和蛋白质中可以检测到N-15，并且与HVPGB1.1-和WT植物相比，HVPGB1.1 +植物中的N-15水平显着高。我们的结果表明，植物植物过度表达植物允许植物更有效地使用大气不作为n源。

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