Systemin transiently depolarizes the tomato mesophyll cell membrane and antagonizes fusicoccin‐induced extracellular acidification of mesophyll tissue
Systemin transiently depolarizes the tomato mesophyll cell membrane and antagonizes fusicoccin‐induced extracellular acidification of mesophyll tissue
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系统素短暂去极化番茄叶肉细胞膜并拮抗梭菌素诱导的叶肉组织细胞外酸化
DOI：
10.1111/j.1365-3040.1996.tb00338.x
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发表时间：
1996
影响因子：
7.3
通讯作者：
E. Johannes
中科院分区：
文献类型：
--
作者：
C. Moyen;E. Johannes
植物多肽信号系统诱导番茄叶片合成蛋白酶抑制剂。我们在这里表明，系统诱导了番茄叶肉细胞膜的瞬时去极化。此外，它触发叶肉组织外部pH值的短暂下降，随后是持续的pH值增加。在梭菌素存在的情况下（已被证明可以拮抗蛋白酶抑制剂的合成），去极化和短暂的H +流出减弱，而持续的电中性H +内流的较慢阶段持续存在。这些结果表明，系统诱导的离子转运变化在系统信号转导的早期阶段发挥作用。
The plant polypeptide signal systemin induces proteinase inhibitor synthesis in tomato leaves. We show here that systemin elicits a transient depolarization of the tomato mesophyll cell membrane. Furthermore it triggers a transient decrease in the external pH of the mesophyll tissue which is followed by a sustained pH increase. In the presence of fusicoccin (which has been shown to antagonize the synthesis of proteinase inhibitors) the depolarization and transient H + efflux are attenuated whereas the slower phase of the sustained electroneutral H + influx persists. These results suggest that systemin-induced changes in ion transport play a role in the early phases of systemin signal transduction.