Water deficit effects on caraway (Carum carvi L.) growth, essential oil and fatty acid composition

The Mediterranean region suffers of drought which affects plant behaviour regarding biochemical responses. Accordingly, the effects of water deficit on growth, essential oil and fatty acid composition of caraway (Carum carvi L.) seeds were investigated. Plants were treated with different levels of water deficit: control, moderate water deficit and severe water deficit. Plant growth (height, fresh and dry matter weight) was significantly reduced by severe water deficit. This last caused also important reductions of the seed yield and yield components. Drought decreased significantly seed total fatty acid contents and particularly the petroselinic ones whose proportions decreased significantly by 12.17 and 18.47%, in comparison with the control, under moderate water deficit and severe water deficit, respectively. Besides, moderate water deficit increased the essential oil yield (expressed as g/100 g on the basis of dry matter weight). The main essential oil constituents were carvone and limonene which showed an increasing of their contents under water deficit levels. Thus, water deficit induced a significant reduction in growth parameters and fatty acid content, and an increase in the essential oil compounds. These bioactive compounds have been required in many industrial products.     

苧烯一步法合成香芹酮的研究

以钴盐为催化剂，烯氧化一步法合成香芹酮。探讨了催化剂体系、用量、反应温度、反应时间等对香芹酮得率的影响，确定了适宜的工艺条件。     

L-香芹酮硫醚类化合物的合成及其对三种植物病原真菌的活性研究

以香芹酮为原料,经氯代、亲核取代合成了6个香芹酮硫醚类化合物,其结构经过了^1HNMR、IR和元素分析的确证。对其初步生物活性测试结果表明：部分化合物对水稻稻瘟病菌、小麦赤霉病菌、辣椒枯萎病菌具有较好的抑制活性。当浓度为125μg／mL时,硫醚类化合物3d对水稻稻瘟病菌、小麦赤霉病菌、辣椒枯萎病菌的抑制率分别为58．40％,52．12％,61．83％。