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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Accessions of Brazilian ginseng (Pfaffia glomerata) with contrasting anthocyanin content behave differently in growth, antioxidative defense, and 20-hydroxyecdysone levels under UV-B radiation
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Accessions of Brazilian ginseng (Pfaffia glomerata) with contrasting anthocyanin content behave differently in growth, antioxidative defense, and 20-hydroxyecdysone levels under UV-B radiation

机译：巴西人参（Pfaffafia glomerata）对比的花青素含量的生长，抗氧化防御和20-羟基粥样酮水平不同，在UV-B辐射下表现不同

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摘要

Ultraviolet-B (UV-B) radiation is an elicitor of secondary metabolites in plant tissue culture, but the effects on 20-hydroxyecdysone (20E) are still unclear. The 20E may show biotechnological, pharmacological, medical, and agrochemical applicability. Here, we use Pfaffia glomerata, a medically important species, to understand the impacts of UV-B radiation on their physiological performance, the expression of key genes involved in the 20E biosynthesis, and the 20E content. Two accessions (A22 and A43) of plants 20 days old grown in vitro were exposed to 0 (control), 2 (6.84 kJ m(-2)), and 4 (13.84 kJ m(-2)) h UV-B radiation for 20 consecutive days. Our data showed that UV-B reduced glucose concentration in A22 and A43 under 4 h of exposure (29 and 30%, respectively), while sucrose concentration increased (32 and 57%, respectively). UV-B also differentially impacted the accessions (A22 and A43), where the A22 under 4 h of UV-B had reduced total dry weight (8%) and electron transport rate (31%); in contrast, A43 did not change. Also, only A22 had increased POD activity under 4 h of UV-B (66%), as well as increased gene expression of the 20E pathway and the 20E content under 2 and 4 h of UV-B in leaves (28 and 21%, respectively) and roots (16 and 13%, respectively). This differential performance to UV-B can be explained by the contrasting anthocyanin contents. Notably, A43 displayed 56% more anthocyanin to the former, a possible defense against UV-B. In conclusion, UV-B radiation is a potential elicitor for increasing 20E content in P. glomerata grown in vitro.
机译：Ultraviolet-B（UV-B）辐射是植物组织培养中的次级代谢产物的引导性，但对20-羟基粥样酮（20e）的影响尚不清楚。 20E可以显示生物技术，药理学，医疗和农业化学应用。在这里，我们使用PFaffia glomerata，一种医学上重要的物种，了解UV-B辐射对其生理性能的影响，涉及20E生物合成的关键基因的表达，以及20E含量。在体外生长20天的植物的两种牧草（A22和A43）暴露于0（对照），2（6.84kJ m（-2））和4（13.84kJ m（-2））H uv-B辐射连续20天。我们的数据表明，UV-B在4小时内降低了A22和A43的葡萄糖浓度（分别分别为29％），而蔗糖浓度分别增加（32和57％）。 UV-B也差异地影响了缩进（A22和A43），其中UV-B中4小时的A22减少了总干重（8％）和电子传输速率（31％）;相比之下，A43没有改变。此外，仅A22在UV-B（66％）下的4小时内具有增加的豆荚活性，以及​​20e途径的基因表达和叶中UV-B的2和4小时下的20E含量（28和21％）分别为）和根（分别为16和13％）。通过对比度的花青素内容物来解释对UV-B的这种差异性能。值得注意的是，A43向前展示了56％的花青素，对UV-B可能进行防御。总之，UV-B辐射是用于在体外增长的P.Glomerata中增加20E含量的潜在引导者。

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