...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Plant Physiology >Treatment of Amaranthus cruentus with chemical and biological inducers of resistance has contrasting effects on fitness and protection against compatible Gram positive and Gram negative bacterial pathogens.
【24h】

Treatment of Amaranthus cruentus with chemical and biological inducers of resistance has contrasting effects on fitness and protection against compatible Gram positive and Gram negative bacterial pathogens.

机译：用化学和生物抗药性诱导剂治疗A菜具有相反的效果，可以抵御革兰氏阳性和革兰氏阴性细菌致病菌的侵害。

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Amaranthus cruentus ( Ac) plants were treated with the synthetic systemic acquired resistance (SAR) inducer benzothiadiazole (BTH), methyl jasmonate (MeJA) and the incompatible pathogen, Pseudomonas syringae pv. syringae ( Pss), under greenhouse conditions. The treatments induced a set of marker genes in the absence of pathogen infection: BTH and Pss similarly induced genes coding for pathogenesis-related and antioxidant proteins, whereas MeJA induced the arginase, LOX2 and amarandin 1 genes. BTH and Pss were effective when tested against the Gram negative pathogen Ps pv. tabaci ( Pst), which was found to have a compatible interaction with grain amaranth. The resistance response appeared to be salicylic acid-independent. However, resistance against Clavibacter michiganensis subsp. michiganensis ( Cmm), a Gram positive tomato pathogen also found to infect Ac, was only conferred by Pss, while BTH increased susceptibility. Conversely, MeJA was ineffective against both pathogens. Induced resistance against Pst correlated with the rapid and sustained stimulation of the above genes, including the AhPAL2 gene, which were expressed both locally and distally. The lack of protection against Cmm provided by BTH, coincided with a generalized down-regulation of defense gene expression and chitinase activity. On the other hand, Pss-treated Ac plants showed augmented expression levels of an anti-microbial peptide gene and, surprisingly, of AhACCO, an ethylene biosynthetic gene associated with susceptibility to Cmm in tomato, its main host. Pss treatment had no effect on productivity, but compromised growth, whereas MeJA reduced yield and harvest index. Conversely, BTH treatments led to smaller plants, but produced significantly increased yields. These results suggest essential differences in the mechanisms employed by biological and chemical agents to induce SAR in Ac against bacterial pathogens having different infection strategies. This may determine the outcome of a particular plant-pathogen interaction, leading to resistance or susceptibility, as in Cmm-challenged Ac plants previously induced with Pss or BTH, respectively.
机译：用合成的系统获得性抗药性（SAR）诱导剂苯并噻二唑（BTH），茉莉酸甲酯（MeJA）和不相容的病原体丁香假单胞菌（Pseudomonas syringae pv）处理treated菜（Ac）植物。丁香（Pss），在温室条件下。这些治疗方法在没有病原体感染的情况下诱导了一组标记基因：BTH和Pss同样诱导了与致病相关的蛋白和抗氧化剂蛋白的编码基因，而MeJA诱导了精氨酸酶，LOX2和amarandin 1基因。当针对革兰氏阴性病原体Ps pv测试时，BTH和Pss有效。烟粉（Pst），被发现与grain菜具有兼容的相互作用。耐药反应似乎与水杨酸无关。然而，对密歇根州杆状杆菌亚种具有抗性。密西根州（Cmm）是革兰氏阳性番茄病原体，也发现可感染Ac，仅由Pss赋予，而BTH则增加了敏感性。相反，MeJA对两种病原体均无效。对Pst的诱导抗性与上述基因的快速和持续刺激有关，包括在局部和远侧表达的上述基因，包括AhPAL2基因。 BTH缺乏针对Cmm的保护，与防御基因表达和几丁质酶活性的普遍下调相吻合。另一方面，经Pss处理的Ac植物显示出抗菌肽基因的表达水平提高，而且令人惊讶的是，与主要寄主番茄中Cmm易感性相关的乙烯生物合成基因AhACCO。 Pss处理对生产力没有影响，但会损害生长，而MeJA会降低产量和收获指数。相反，BTH处理导致植物较小，但产量显着提高。这些结果表明，生物和化学试剂在针对具有不同感染策略的细菌病原体诱导Ac中的SAR中所采用的机理上存在本质差异。如先前分别用Pss或BTH诱导的Cmm挑战的Ac植物一样，这可能确定特定植物与病原体相互作用的结果，从而导致抗性或敏感性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号