Zunino María P, Zygadlo Julio A
Instituto Multidisciplinario de Biología Vegetal, CONICET, Cátedra de Química Orgánica, Facultad de Ciencias Exactas Físicas y Naturales, Universidad Nacional de Córdoba, Ciudad Universitaria, Argentina.
J Chem Ecol. 2005 Jun;31(6):1269-83. doi: 10.1007/s10886-005-5285-2.
Terpenes are thought to be important in plant plant interactions because of their phytotoxic action on seed germination and growth. Herein, the effects of five volatile monoterpenes on root sterols and phospholipid fatty acid (PLFA) composition have been studied during maize seedling germination. The investigated monoterpenes (camphor, 1-8 cineole, geraniol, menthol, and thymol) were applied at their respective IC80 (concentration causing 80% inhibition). They quantitatively affected free sterols and PLFA composition, thus producing an increase in the percentage of unsaturated PLFAs, stigmasterol of the free sterol fraction, and saturated steryl ester fatty acids. Alcoholic and nonalcoholic monoterpenes appeared to have different modes of action. The former affected unsaturated fatty acid and stigmasterol to a greater extent, and accordingly they could interfere in seedling growth by changes in the membrane lipids.
由于萜类化合物对种子萌发和生长具有植物毒性作用，因此它们被认为在植物与植物的相互作用中很重要。在此，研究了五种挥发性单萜在玉米种子萌发过程中对根系甾醇和磷脂脂肪酸（PLFA）组成的影响。所研究的单萜（樟脑、1,8-桉叶素、香叶醇、薄荷醇和百里香酚）以各自的IC80（引起80%抑制的浓度）施用。它们定量地影响游离甾醇和PLFA组成，从而使不饱和PLFAs、游离甾醇部分的豆甾醇以及饱和甾醇酯脂肪酸的百分比增加。含醇和不含醇的单萜似乎具有不同的作用方式。前者对不饱和脂肪酸和豆甾醇的影响更大，因此它们可能通过膜脂的变化干扰幼苗生长。
