Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC); Buenos Aires, Argentina; Facultad de Ciencias Agrarias; Universidad Nacional de Mar del Plata; Buenos Aires, Argentina.
Plant Signal Behav. 2013 Mar;8(3):e23316. doi: 10.4161/psb.23316. Epub 2013 Jan 18.
The role of sucrose as a signaling molecule in plants was originally proposed several decades ago. However, recognition of sucrose as a true signal has been largely debated and only recently this role has been fully accepted. The best-studied cases of sucrose signaling involve metabolic processes, such as the induction of fructan or anthocyanin synthesis, but a large volume of scattered information suggests that sucrose signals may control a vast array of developmental processes along the whole life cycle of the plant. Also, wide gaps exist in our current understanding of the intracellular steps that mediate sucrose action. Sucrose concentration in plant tissues tends to be directly related to light intensity, and inversely related to temperature, and accordingly, exogenous sucrose supply often mimics the effect of high light and cold. However, many exceptions to this rule seem to occur due to interactions with other signaling pathways. In conclusion, the sucrose role as a signal molecule in plants is starting to be unveiled and much research is still needed to have a complete map of its significance in plant function.
几十年来，蔗糖作为植物信号分子的作用最初被提出。然而，蔗糖作为一种真正的信号的识别在很大程度上存在争议，直到最近，这一作用才被完全接受。蔗糖信号作用的研究最多的是代谢过程，如诱导果糖或花青素的合成，但大量分散的信息表明，蔗糖信号可能控制着植物整个生命周期中大量发育过程。此外，我们对介导蔗糖作用的细胞内步骤的理解还存在很大的差距。植物组织中的蔗糖浓度与光照强度直接相关，与温度成反比，因此，外源蔗糖的供应通常模拟高光和低温的效果。然而，由于与其他信号通路的相互作用，似乎出现了许多对这一规则的例外。总之，蔗糖作为植物信号分子的作用开始被揭示，而要全面了解其在植物功能中的意义，还需要进行大量的研究。
