Gupta Kamala, Sengupta Atreyee, Chakraborty Mayukh, Gupta Bhaskar
Department of Biological Sciences, Presidency UniversityKolkata, India; Department of Botany, Government General Degree College, Affiliated to University of BurdwanSingur, India.
Department of Biological Sciences, Presidency University Kolkata, India.
Front Plant Sci. 2016 Sep 12;7:1343. doi: 10.3389/fpls.2016.01343. eCollection 2016.
The specific genetic changes through which plants adapt to the multitude of environmental stresses are possible because of the molecular regulations in the system. These intricate regulatory mechanisms once unveiled will surely raise interesting questions. Polyamines and hydrogen peroxide have been suggested to be important signaling molecules during biotic and abiotic stresses. Hydrogen peroxide plays a versatile role from orchestrating physiological processes to stress response. It helps to achieve acclimatization and tolerance to stress by coordinating intra-cellular and systemic signaling systems. Polyamines, on the other hand, are low molecular weight polycationic aliphatic amines, which have been implicated in various stress responses. It is quite interesting to note that both hydrogen peroxide and polyamines have a fine line of inter-relation between them since the catabolic pathways of the latter releases hydrogen peroxide. In this review we have tried to illustrate the roles and their multifaceted functions of these two important signaling molecules based on current literature. This review also highlights the fact that over accumulation of hydrogen peroxide and polyamines can be detrimental for plant cells leading to toxicity and pre-mature cell death.
由于该系统中的分子调控，植物通过特定的基因变化来适应多种环境胁迫成为可能。一旦揭示这些复杂的调控机制，必然会引发有趣的问题。多胺和过氧化氢被认为是生物和非生物胁迫过程中的重要信号分子。过氧化氢发挥着从协调生理过程到应激反应的多种作用。它通过协调细胞内和系统信号系统，帮助实现对胁迫的适应和耐受。另一方面，多胺是低分子量的聚阳离子脂肪族胺，它们参与了各种应激反应。值得注意的是，过氧化氢和多胺之间存在着密切的相互关系，因为多胺的分解代谢途径会释放过氧化氢。在本综述中，我们试图根据现有文献阐述这两种重要信号分子的作用及其多方面功能。本综述还强调了一个事实，即过氧化氢和多胺的过度积累可能对植物细胞有害，导致毒性和过早的细胞死亡。
