Tomato plants increase their tolerance to low temperature in a chilling acclimation process entailing comprehensive transcriptional and metabolic adjustments
Tomato plants increase their tolerance to low temperature in a chilling acclimation process entailing comprehensive transcriptional and metabolic adjustments
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DOI：
10.1111/pce.12799
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发表时间：
2016-10-01
影响因子：
7.3
通讯作者：
Salinas, Julio
中科院分区：
文献类型：
--
作者：
Barrero-Gil, Javier;Huertas, Raul;Salinas, Julio
低温是一种主要的环境胁迫，严重影响植物的发育、分布和生产力。大多数作物来自热带，因此对寒冷敏感。然而，有趣的是，一些热带植物，能够增强其耐寒性时，以前暴露于次优的生长温度。然而，这一适应过程的分子和生理机制，称为冷驯化，仍然是几乎未知的。在这里，我们证明，番茄植物可以开发一个寒冷的驯化反应，其中包括全面的转录和代谢的调整，从而提高耐冷性。更重要的是，我们的研究结果揭示了这种反应和冷驯化之间的强烈相似性，冷驯化是来自温带地区的植物在暴露于低的非冻结温度后提高其抗冻性的过程。低温和低温驯化都受一组相似的转录因子和激素的调控，并具有共同的防御机制，包括相容性溶质的积累、抗氧化系统的动员和光合机制的重排。尽管如此，我们已经发现了一些重要的分歧，可能占番茄植物的冷冻敏感性。本文报道的数据将促进对低温驯化反应的新研究，以提高番茄对低温的耐受性。
Low temperature is a major environmental stress that seriously compromises plant development, distribution and productivity. Most crops are from tropical origin and, consequently, chilling sensitive. Interestingly, however, some tropical plants, are able to augment their chilling tolerance when previously exposed to suboptimal growth temperatures. Yet, the molecular and physiological mechanisms underlying this adaptive process, termed chilling acclimation, still remain practically unknown. Here, we demonstrate that tomato plants can develop a chilling acclimation response, which includes comprehensive transcriptomic and metabolic adjustments leading to increased chilling tolerance. More important, our results reveal strong resemblances between this response and cold acclimation, the process whereby plants from temperate regions raise their freezing tolerance after exposure to low, non-freezing temperatures. Both chilling and cold acclimation are regulated by a similar set of transcription factors and hormones, and share common defence mechanisms, including the accumulation of compatible solutes, the mobilization of antioxidant systems and the rearrangement of the photosynthetic machinery. Nonetheless, we have found some important divergences that may account for the freezing sensitivity of tomato plants. The data reported in this manuscript should foster new research into the chilling acclimation response with the aim of improving tomato tolerance to low temperature.