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首页> 外文OA文献 >Uniconazole-induced starch accumulation in the bioenergy crop duckweed (Landoltia punctata) I: transcriptome analysis of the effects of uniconazole on chlorophyll and endogenous hormone biosynthesis
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Uniconazole-induced starch accumulation in the bioenergy crop duckweed (Landoltia punctata) I: transcriptome analysis of the effects of uniconazole on chlorophyll and endogenous hormone biosynthesis

机译：烯效唑诱导的生物能源作物浮萍中的淀粉积累I：烯效唑对叶绿素和内源激素生物合成影响的转录组分析

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Background: Duckweed is a novel aquatic bioenergy crop that is found ubiquitously throughout the world. Uniconazole plays an important role in improving crop production through the regulation of endogenous hormone levels. We found that a high quantity and quality of duckweed growth can be achieved by uniconazole application, although the mechanisms are unknown. Results: The fronds of Landoltia punctata were sprayed evenly with 800 mg/L uniconazole. The dry weight following treatment increased by 10% compared to the controls at 240 h. Endogenous cytokinin (CK) and abscisic acid (ABA) content both increased compared to the control, while the level of gibberellins (GAs) decreased. Additionally, gene expression profiling results showed that the expression of transcripts encoding key enzymes involved in endogenous CK and ABA biosynthesis were up-regulated, while the transcripts of key enzymes for GAs biosynthesis were down-regulated. On the other hand, chlorophyll a and chlorophyll b contents were both increased compared with the control. Moreover, the net photosynthetic rate was elevated to 25.6 mu mol CO2/m(2)/s compared with the control value of 22.05 mu mol CO2/m(2)/s. Importantly, the expression of some chlorophyll biosynthesis-related transcripts was up-regulated. Conclusion: Uniconazole treatment altered endogenous hormone levels and enhanced chlorophyll content and net photosynthetic rate in duckweed by regulating key enzymes involved in endogenous hormone and chlorophyll biosynthesis. The alterations of endogenous hormones and the increase of chlorophyll and photosynthetic rate data support the increase of biomass and starch accumulation.
机译：背景：浮萍是一种新型的水生生物能源作物，在世界范围内广泛存在。烯效唑通过调节内源激素水平在提高作物产量中发挥重要作用。我们发现通过烯康唑的应用可以实现高质量和高质量的浮萍生长，尽管其机理尚不清楚。结果：用800 mg / L烯效唑均匀喷洒了兰Land叶。与240 h的对照相比，处理后的干重增加了10％。与对照相比，内源性细胞分裂素（CK）和脱落酸（ABA）含量均增加，而赤霉素（GAs）含量降低。另外，基因表达谱分析结果表明，编码涉及内源性CK和ABA生物合成的关键酶的转录物的表达上调，而用于GAs生物合成的关键酶的转录物的表达下调。另一方面，与对照相比，叶绿素a和叶绿素b的含量均增加。此外，净光合速率提高到25.6摩尔mol CO2 / m（2）/ s，而控制值为22.05摩尔mol CO2 / m（2）/ s。重要的是，一些与叶绿素生物合成相关的转录本的表达上调。结论：烯效唑处理通过调节参与内源激素和叶绿素生物合成的关键酶，改变了浮萍的内源激素水平，提高了叶绿素含量和净光合速​​率。内源激素的变化以及叶绿素和光合速率数据的增加支持了生物量和淀粉积累的增加。

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