Above- and below-ground terpenoid aldehyde induction in cotton, Gossypium herbaceum, following root and leaf injury
Above- and below-ground terpenoid aldehyde induction in cotton, Gossypium herbaceum, following root and leaf injury
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DOI：
10.1023/b:joec.0000013182.50662.2a
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发表时间：
2004-01-01
影响因子：
2.3
通讯作者：
Wäckers, FL
中科院分区：
文献类型：
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作者：
Bezemer, TM;Wagenaar, R;Wäckers, FL
关于诱导防御的研究主要集中在地上食草动物和病原体的叶诱导上。然而，根部受到的噬菌体攻击数量与芽部一样多，甚至更多，因此实际上植物会受到地上和地下的攻击。在这里，我们报告了叶和/或根损伤对棉花（Gossypium herbaceum）萜类醛积累的影响。使用 HPLC，我们分析了叶子和根组织中各个萜醛的浓度。在未受损的植物中，萜醛集中在年轻的未成熟的主叶中。从主叶分枝的侧叶中的浓度在叶位置之间没有差异。甜菜夜蛾幼虫对成熟叶子的地上取食提高了未成熟叶子中的萜类化合物浓度，但在受损叶子中没有增加。特别是，食草后半棉酚酮和杀螺旋剂 1 和 4 的浓度增加。金针虫（Agriotes lineatus）的根部食草也导致叶子中萜类化合物水平的增加。与叶食草相反，未成熟和成熟的叶子都被诱导。然而，与叶食草相比，根食草后的诱导水平要低得多。暴露于根食草的植物根组织中的萜醛含量也显着升高，而叶食草后没有发现这种影响。暴露于根和叶食草的植物似乎主要在地上诱导，但以地下防御为代价。讨论了地上和地下多营养相互作用的影响。
Studies on induced defenses have predominantly focused on foliar induction by above-ground herbivores and pathogens. However, roots are attacked by as many if not more phytophages than shoots, so in reality plants are exposed to above- and below-ground attack. Here, we report effects of foliar and/or root damage on terpenoid aldehyde accumulation in cotton ( Gossypium herbaceum). Using HPLC, we analyzed concentrations of individual terpenoid aldehydes in foliage and root tissue. In undamaged plants, terpenoid aldehydes were concentrated in young immature main leaves. Concentrations in side leaves, branching from the main leaves, did not differ among leaf position. Above-ground feeding by Spodoptera exigua larvae on a mature leaf enhanced terpenoid concentrations in immature leaves but not in the damaged leaf. In particular, concentrations of hemigossypolone and the heliocides 1 and 4 were enhanced following herbivory. Root herbivory by wireworms (Agriotes lineatus) also resulted in an increase in terpenoid levels in the foliage. In contrast with foliar herbivory, both immature and mature leaves were induced. However, the level of induction after root herbivory was much lower compared to foliar herbivory. Plants exposed to root herbivory also had significantly higher levels of terpenoid aldehydes in root tissue, while no such effect was found following foliar herbivory. Plants exposed to both root and foliar herbivory appeared to induce primarily above-ground at the cost of below-ground defense. The implications for above- and below-ground Mutitrophic interactions are discussed.