Differential characteristics of salicylic acid-mediated signaling \in potato
Differential characteristics of salicylic acid-mediated signaling \in potato
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DOI：
10.1016/j.pmpp.2004.09.001
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发表时间：
2004-04-01
影响因子：
2.7
通讯作者：
Mayo, D
中科院分区：
文献类型：
--
作者：
Navarre, DA;Mayo, D
马铃薯（Solanam tuberosum）在水杨酸（SA）代谢和信号传导方面与烟草和拟南芥具有关键差异，例如在所检查的所有组织（包括根和块茎）中的高基础水杨酸浓度。马铃薯具有高水平的基础PR-1表达，这似乎是高SA水平的结果，因为在nahG植物中表达降低。尽管高的基础SA水平，马铃薯仍然响应于外源SA和少至250 μ M SA诱导的PR-1当喷洒在植物上。然而，在田间条件下生长的植物在某些时候对BTH的反应较低。尽管总SA浓度很高，但一些马铃薯品种能够保持游离SA水平低至总SA的0.5%。马铃薯也是不寻常的，因为在没有任何额外处理的情况下，PR-1在叶圆片中被强烈诱导。此外，马铃薯叶圆片对BTH过敏，低至1 μ M的浓度引起广泛的细胞死亡，而高达500 μ M的浓度对烟草没有这种影响。爱思唯尔有限公司出版
Potato (Solanam tuberosum) has key differences in salicylic acid (SA) metabolism and signaling from tobacco and Arabidopsis such as high basal salicylic acid concentrations in all tissues examined, including roots and tubers. Potato has high levels of basal PR-1 expression and this appears to be a consequence of the high SA levels, because the expression is reduced in nahG plants. Despite the high basal SA levels, potato was nevertheless responsive to exogenous SA and as little as 250 muM SA-induced PR-1 when sprayed on plants. However, plants grown in field conditions appeared less responsive to BTH at certain times. In spite of the high total SA concentrations, some potato varieties are able to maintain free SA levels as low as 0.5% of the total SA. Potato is also unusual in that PR-1 is strongly induced in leaf discs in the absence of any additional treatment. Furthermore, potato leaf discs are hypersensitive to BTH, with concentrations as low as 1 muM causing extensive cell death, whereas concentrations as high as 500 muM had no such effect on tobacco. Published by Elsevier Ltd.