Connecting proline metabolism and signaling pathways in plant senescence.
Connecting proline metabolism and signaling pathways in plant senescence.
复制标题
DOI：
10.3389/fpls.2015.00552
复制
发表时间：
2015
影响因子：
5.6
通讯作者：
Becker DF
中科院分区：
文献类型：
--
作者：
Zhang L;Becker DF
氨基酸脯氨酸在逆境适应中具有独特的生物学作用。脯氨酸代谢在应激状态下通过多种复杂的调节途径进行调节，并能深刻影响微生物、植物和动物的细胞死亡和存活。虽然Pro的作用是通过不同的信号通路来实现的，但一个共同的主题似乎是由于Pro氧化与呼吸电子传递链耦合而产生了活性氧物种(ROS)。已有大量研究致力于了解植物如何利用脯氨酸代谢来响应非生物和生物胁迫。在这里，我们综述了脯氨酸代谢影响植物衰老的潜在机制，即在花瓣和叶片中。最近对花瓣衰老的研究表明，脯氨酸含量受到操纵，以满足衰老细胞的能量需求。在花和叶中，脯氨酸代谢可能影响ROS信号通路，从而延缓衰老进程。未来的研究将重点放在衰老过程中发生的脯氨酸代谢变化的机制上，这可能会导致新的方法来拯救处于逆境下的作物，并在收获后保存农产品。
The amino acid proline has a unique biological role in stress adaptation. Proline metabolism is manipulated under stress by multiple and complex regulatory pathways and can profoundly influence cell death and survival in microorganisms, plants, and animals. Though the effects of proline are mediated by diverse signaling pathways, a common theme appears to be the generation of reactive oxygen species (ROS) due to proline oxidation being coupled to the respiratory electron transport chain. Considerable research has been devoted to understand how plants exploit proline metabolism in response to abiotic and biotic stress. Here, we review potential mechanisms by which proline metabolism influences plant senescence, namely in the petal and leaf. Recent studies of petal senescence suggest proline content is manipulated to meet energy demands of senescing cells. In the flower and leaf, proline metabolism may influence ROS signaling pathways that delay senescence progression. Future studies focusing on the mechanisms by which proline metabolic shifts occur during senescence may lead to novel methods to rescue crops under stress and to preserve post-harvest agricultural products.