INCREASE IN SALICYLIC-ACID AT THE ONSET OF SYSTEMIC ACQUIRED-RESISTANCE IN CUCUMBER
INCREASE IN SALICYLIC-ACID AT THE ONSET OF SYSTEMIC ACQUIRED-RESISTANCE IN CUCUMBER
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DOI：
10.1126/science.250.4983.1004
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发表时间：
1990-11-16
期刊：
影响因子：
56.9
通讯作者：
INVERARDI, B
中科院分区：
文献类型：
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作者：
METRAUX, JP;SIGNER, H;INVERARDI, B
为了鉴定介导系统性获得性抗性（SAR）的信号化合物，对接种烟草坏死病毒和真菌病原菌炭疽菌（Colletotrichum lagenarium）的黄瓜植株韧皮部汁液含量的变化进行了监测。一种荧光代谢物的浓度在接种后短暂升高，在检测SAR前达到峰值。该化合物经气相色谱-质谱法纯化并鉴定为水杨酸，是一种已知的外源抗性诱导剂。结果表明，水杨酸可能是黄瓜体内SAR传递的内源信号。
In an effort to identify the signal compound that mediates systemic acquired resistance (SAR), changes in the content of phloem sap were monitored in cucumber plants inoculated with either tobacco necrosis virus or the fungal pathogen, Colletotrichum lagenarium. The concentration of a fluorescent metabolite was observed to increase transiently after inoculation, with a peak reached before SAR was detected. The compound was purified and identified by gas chromatography-mass spectrometry as salicylic acid, a known exogenous inducer of resistance. The data suggest that salicylic acid could function as the endogenous signal in the transmission of SAR in cucumber.