Deane Bowers M, Collinge Sharon K, Gamble Susan E, Schmitt Johanna
Department of Environmental, Population, and Organismic Biology, University of Colorado, Campus Box 334, 80309, Boulder, CO, USA.
Graduate School of Design, Harvard University, 48 Quincy Street, 02138, Cambridge, MA, USA.
Oecologia. 1992 Aug;91(2):201-207. doi: 10.1007/BF00317784.
We investigated the effects of genotype, habitat, and seasonal variation on production of the iridoid glycosides, aucubin and catalpol, in leaves of the common weed Plantago lanceolata. Two genotypes, one each from a lawn and an adjacent abandoned hayfield population, were clonally replicated in the greenhouse, and then planted back into the two habitats. One quarter of the plants from each treatment were harvested on each of four dates, at approximately two-week intervals. Over the course of the growing season, and in both habitats, we found a significant increase in the concentration of both aucubin and catalpol in P. lanceolata leaves. The genotypes differed in their response to environmental variation, both in time and between sites, as indicated by significant genotype x date and genotype x site interactions. Early in the season, habitat (lawn or field) had a greater effect on iridoid glycoside concentration than did plant genotype, but later in the season, plant genotype was more influential in determining the iridoid glycoside concentration. Thus, the relative palatability of Plantago genotypes to specialist and generalist herbivores may vary in time and space.
我们研究了基因型、栖息地和季节变化对常见杂草窄叶车前叶片中裂环烯醚萜苷类化合物桃叶珊瑚苷和梓醇产量的影响。从草坪和相邻废弃干草地种群中分别选取了两种基因型，在温室中进行克隆繁殖，然后再种植回这两种栖息地。在四个日期中的每个日期，每隔大约两周收获各处理组四分之一的植株。在整个生长季节中，在两种栖息地中，我们都发现窄叶车前叶片中桃叶珊瑚苷和梓醇的浓度显著增加。基因型在对环境变化的响应上存在差异，在时间和地点上均如此，显著的基因型×日期和基因型×地点交互作用表明了这一点。在季节早期，栖息地（草坪或田地）对裂环烯醚萜苷浓度的影响比植物基因型更大，但在季节后期，植物基因型在决定裂环烯醚萜苷浓度方面更具影响力。因此，窄叶车前不同基因型对专食性和广食性食草动物的相对适口性可能会随时间和空间而变化。
