Local and systemic effects of oxylipins on powdery mildew infection in barley
Local and systemic effects of oxylipins on powdery mildew infection in barley
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DOI：
10.1002/ps.1026
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发表时间：
2005-06-01
影响因子：
4.1
通讯作者：
Walters, D
中科院分区：
文献类型：
--
作者：
Cowley, T;Walters, D
大麦幼苗的第一片叶用羟基脂油酸或两种三羟基-9，12，13-三羟基-11(E)-十八烯酸和9，12，13-三羟基-10(E)-十八烯酸处理，可以减少白粉病真菌Blumeria graminis Speer f sphordei Marchal对大麦幼苗第一片叶的侵染。当在第一片叶上使用时，醚油酸和秋水仙酸以及三羟基氧脂9，12，13-trihydroxy-10(E)，15(Z)-octadecadienoic酸也可以减少第二片叶的霉菌侵染。在所有观察到局部和系统对白粉病的影响的情况下，防御相关酶苯丙氨酸解氨酶(PAL)的活性都有所增加，但只有在白粉病挑战接种之后才会增加。过氧化物酶活性不受氧脂处理和霉菌接种的影响。观察到的影响是由于氧脂还是由于分解产物尚不清楚，因为没有关于这些特定氧脂在叶表面的稳定性的信息。尽管如此，这些数据还是首次报道了氧脂预治疗对病原体感染的全身性影响。(C)2005年化学工业学会。
Treatment of the first leaves of barley seedlings with the oxylipin colneleic acid, or the two trihydroxy oxylipins 9,12,13-trihydroxy-11(E)-octadecenoic acid and 9,12,13-trihydroxy-10(E)-octadecenoic acid, reduced infection of that leaf by the powdery mildew fungus Blumeria graminis Speer f sp hordei Marchal. When applied to first leaves, etheroleic acid and colneleic acid, as well as the trihydroxy oxylipin 9,12,13-trihydroxy-10(E),15(Z)-octadecadienoic acid, also reduced mildew infection in second leaves. In all cases where local and systemic effects against mildew were observed, activity of the defence-related enzyme phenylalanine ammonia lyase (PAL) was increased, but only following challenge inoculation with powdery mildew. Peroxidase activity was not affected by oxylipin treatment or mildew inoculation. Whether the effects observed were due to the oxylipins or to breakdown products is not known, since no information is available on the stability of these particular oxylipins on leaf surfaces. Nevertheless, these data represent the first report of systemic effects against pathogen infection following pre-treatment with oxylipins. (c) 2005 Society of Chemical Industry.