Different Narrow-Band Light Ranges Alter Plant Secondary Metabolism and Plant Defense Response to Aphids
Different Narrow-Band Light Ranges Alter Plant Secondary Metabolism and Plant Defense Response to Aphids
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DOI：
10.1007/s10886-016-0755-2
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发表时间：
2016-09
影响因子：
2.3
通讯作者：
Ole Rechner;S. Neugart;M. Schreiner;Sasa Wu;H. Poehling
中科院分区：
文献类型：
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作者：
Ole Rechner;S. Neugart;M. Schreiner;Sasa Wu;H. Poehling
不同波长的光影响植物的各种生理过程。短波长辐射（如紫外线）可以激活植物的防御途径，增强次生代谢物（如类黄酮和硫代葡萄糖苷）的生物合成，从而抵抗某些食草昆虫。光诱导的、基于代谢物的抗性的强度是植物和昆虫物种特异性的，并且取决于食草动物的摄食公会和专业化。在这项研究中，西兰花（Brassica oleraceavar.italica）植物在气候室中在常规荧光管下生长4周，并且另外用UV-B管或发光二极管（LED）产生的UV-B（310 nm）、UV-A（365或385 nm）或紫光（420 nm）处理。目的是确定窄带宽的光（从UV-B到紫色）对植物次生代谢的影响，以及对甘蓝蚜Brevicoryne brassicae（专家）和绿色桃蚜Myzus persicae（通才）的表现。在黄酮醇糖苷，具体槲皮素和山奈醇糖苷显着增加下的UV-B，而在芥子油苷只有4-甲氧基-3-吲哚甲基表现出2倍的增加，暴露于UV-B和UV-A的植物。UV-B处理后青花菜植株中3-吲哚甲基硫代葡萄糖苷含量增加，青花菜短角蚜成虫的体重和繁殖力低于UV-A和紫光处理。成虫体重和繁殖力。UV-B和UV-A处理下，当使用特定的光波长诱导植物的代谢变化时，应考虑对食草动物诱导效应的特异性。
Light of different wavelengths affects various physiological processes in plants. Short-wavelength radiation (like UV) can activate defense pathways in plants and enhance the biosynthesis of secondary metabolites (such as flavonoids and glucosinolates) responsible for resistance against certain herbivorous insects. The intensity of light-induced, metabolite-based resistance is plant- and insect species-specific and depends on herbivore feeding guild and specialization. In this study, broccoli (Brassica oleraceavar.italica) plants were grown for 4 weeks in a climate chamber under conventional fluorescent tubes and were additionally treated with UV-B (310 nm), UV-A (365 or 385 nm), or violet (420 nm) light generated with UV-B tubes or light-emitting diodes (LEDs). The objective was to determine the influence of narrow bandwidths of light (from UV-B to violet) on plant secondary metabolism and on the performance of the cabbage aphidBrevicoryne brassicae(a specialist) and the green peach aphidMyzus persicae(a generalist). Among flavonol glycosides, specific quercetin and kaempferol glycosides increased markedly under UV-B, while among glucosinolates only 4-methoxy-3-indolylmethyl showed a 2-fold increase in plants exposed to UV-B and UV-A. The concentration of 3-indolylmethyl glucosinolate in broccoli plants increased with UV-B treatment.Brevicoryne brassicaeadult weights and fecundity were lower on UV-B treated plants compared to UV-A or violet light-treated plants. Adult weights and fecundity ofM. persicaewere increased under UV-B and UV-A treatments. When specific light wavelengths are used to induce metabolic changes in plants, the specificity of the induced effects on herbivores should be considered.