How plants handle multiple stresses: hormonal interactions underlying responses to abiotic stress and insect herbivory

详细信息    查看全文

• 作者：Duy Nguyen ; Ivo Rieu ; Celestina Mariani ; Nicole M. van Dam
• 刊名：Plant Molecular Biology
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：91
• 期：6
• 页码：727-740
• 全文大小：1,178 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Sciences
  Biochemistry
  Plant Pathology
  
• 出版者：Springer Netherlands
• ISSN：1573-5028
• 卷排序：91

文摘

Adaptive plant responses to specific abiotic stresses or biotic agents are fine-tuned by a network of hormonal signaling cascades, including abscisic acid (ABA), ethylene, jasmonic acid (JA) and salicylic acid. Moreover, hormonal cross-talk modulates plant responses to abiotic stresses and defenses against insect herbivores when they occur simultaneously. How such interactions affect plant responses under multiple stresses, however, is less understood, even though this may frequently occur in natural environments. Here, we review our current knowledge on how hormonal signaling regulates abiotic stress responses and defenses against insects, and discuss the few recent studies that attempted to dissect hormonal interactions occurring under simultaneous abiotic stress and herbivory. Based on this we hypothesize that drought stress enhances insect resistance due to synergistic interactions between JA and ABA signaling. Responses to flooding or waterlogging involve ethylene signaling, which likely reduces plant resistance to chewing herbivores due to its negative cross-talk with JA. However, the outcome of interactions between biotic and abiotic stress signaling is often plant and/or insect species-dependent and cannot simply be predicted based on general knowledge on the involvement of signaling pathways in single stress responses. More experimental data on non-model plant and insect species are needed to reveal general patterns and better understand the molecular mechanisms allowing plants to optimize their responses in complex environments.KeywordsDroughtFloodingHerbivoryHormonal cross-talkInduced resistanceStress responses