UV-B antagonises shade avoidance and increases levels of the flavonoid quercetin in coriander (Coriandrum sativum).

UV-B antagonises shade avoidance and increases levels of the flavonoid quercetin in coriander (Coriandrum sativum).
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DOI:
10.1038/s41598-017-18073-8
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发表时间:
2017-12-19
期刊:
影响因子:
4.6
通讯作者:
Franklin KA
Franklin KA
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Fraser DP;Sharma A;Fletcher T;Budge S;Moncrieff C;Dodd AN;Franklin KA

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尽管在植物中控制着各种各样的调节过程,但UV-B波长(280-315 nm)被玻璃和聚碳酸酯等常见温室材料衰减,因此在许多商业生长环境中被耗尽。在这项研究中,我们分析了芫荽(Coriandrum sativum,也称为香菜)植物的结构、色素积累和抗氧化能力,这些植物在有和没有补充UV-B(1.5µmol m−2 s−1)的情况下生长。我们证明了UV-B限制了茎伸长对邻近感知(遮荫规避)的响应,促进了更紧凑的植物结构。此外,UV-B增加了叶片槲皮素含量和总抗氧化能力。缺乏类黄酮生物合成的拟南芥突变体在避光抑制中没有受损,这表明uv - b诱导的类黄酮合成不是这种反应的组成部分。我们的研究结果表明,添加UV-B可以提供一种方法来控制盆栽草药的结构、风味和营养成分,同时减少密集种植对产品质量的有害影响。
Despite controlling a diverse array of regulatory processes in plants, UV-B wavelengths (280–315 nm) are attenuated by common greenhouse materials such as glass and polycarbonate and are therefore depleted in many commercial growing environments. In this study, we analysed the architecture, pigment accumulation and antioxidant capacity of coriander (Coriandrum sativum, also known as cilantro) plants grown with and without supplementary UV-B (1.5 µmol m−2 s−1). We demonstrate that UV-B limits stem elongation responses to neighbour proximity perception (shade avoidance), promoting a more compact plant architecture. In addition, UV-B increased leaf quercetin content and total antioxidant capacity. Arabidopsis thaliana mutants deficient in flavonoid biosynthesis were not impaired in shade avoidance inhibition, suggesting that UV-B-induced flavonoid synthesis is not a component of this response. Our results indicate that UV-B supplementation may provide a method to manipulate the architecture, flavour and nutritional content of potted herbs whilst reducing the deleterious impacts of dense planting on product quality.
DELLA 介导的 PIF 降解有助于拟南芥中光和赤霉素信号传导的协调
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