Plant SWEETs: from sugar transport to plant-pathogen interaction and more unexpected physiological roles.
Plant SWEETs: from sugar transport to plant-pathogen interaction and more unexpected physiological roles.
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DOI：
10.1093/plphys/kiab127
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发表时间：
2021-06-11
期刊：
影响因子：
7.4
通讯作者：
Granell A
中科院分区：
文献类型：
--
作者：
Breia R;Conde A;Badim H;Fortes AM;Gerós H;Granell A
糖最终将被输出转运蛋白（SWESTs）在糖流出至关重要的许多生理机制中具有重要作用，包括韧皮部装载、花蜜分泌、种子营养填充以及其他较少预期的功能。它们介导低亲和力和高容量的运输，在被子植物中，这个家族平均由20个旁系同源物组成。由于SWEET促进糖的流出，它们非常容易被病原体劫持，使它们成为植物-病原体相互作用的核心参与者。例如，来自黄单胞菌属的几个物种能够在分泌转录激活因子样效应物后上调水稻（Oryza sativa）中SWEET转运蛋白的转录。其他病原体，如灰葡萄孢或葡萄白粉菌，也能够增加SWEET表达。然而，在某些情况下观察到相反的行为，因为在Pythium irregulare感染期间液泡膜AtSWEET 2的过表达限制了病原体的糖可用性，使植物更具抗性。因此，在植物-病原体相互作用过程中，SWEET转运蛋白的明确作用迄今难以定义，因为决定易感性或抗性反应的代谢特征及其调控节点仍然知之甚少。这引发了一个仍在进行的科学问题：在植物-病原体相互作用过程中，SWEEPROSINE可以发挥什么作用？同样，SWEET转运蛋白在响应非生物胁迫中的作用也知之甚少。在这里，除了它们在生物胁迫的相关性，我们还提供了一个小的一瞥，SWEETHERS的重要性，在植物非生物胁迫，并简要讨论其重要性，在特定的情况下，葡萄藤（葡萄属葡萄），由于其社会经济影响。植物糖转运蛋白不仅在植物发育、植物与病原菌的相互作用和共生关系中起重要作用，而且在非生物胁迫反应和其他植物细胞和生理过程中也起重要作用。
Sugars Will Eventually be Exported Transporters (SWEETs) have important roles in numerous physiological mechanisms where sugar efflux is critical, including phloem loading, nectar secretion, seed nutrient filling, among other less expected functions. They mediate low affinity and high capacity transport, and in angiosperms this family is composed by 20 paralogs on average. As SWEETs facilitate the efflux of sugars, they are highly susceptible to hijacking by pathogens, making them central players in plant–pathogen interaction. For instance, several species from the Xanthomonas genus are able to upregulate the transcription of SWEET transporters in rice (Oryza sativa), upon the secretion of transcription-activator-like effectors. Other pathogens, such as Botrytis cinerea or Erysiphe necator, are also capable of increasing SWEET expression. However, the opposite behavior has been observed in some cases, as overexpression of the tonoplast AtSWEET2 during Pythium irregulare infection restricted sugar availability to the pathogen, rendering plants more resistant. Therefore, a clear-cut role for SWEET transporters during plant–pathogen interactions has so far been difficult to define, as the metabolic signatures and their regulatory nodes, which decide the susceptibility or resistance responses, remain poorly understood. This fuels the still ongoing scientific question: what roles can SWEETs play during plant–pathogen interaction? Likewise, the roles of SWEET transporters in response to abiotic stresses are little understood. Here, in addition to their relevance in biotic stress, we also provide a small glimpse of SWEETs importance during plant abiotic stress, and briefly debate their importance in the particular case of grapevine (Vitis vinifera) due to its socioeconomic impact. Plant SWEETs are sugar transporters important in plant development, plant–pathogen, and symbiotic interactions, but also in abiotic stress response and other plant cellular and physiological processes.
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影响因子：
9.4
作者：
Bezrutczyk, Margaret;Hartwig, Thomas;Sosso, Davide
通讯作者：
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影响因子：
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影响因子：
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影响因子：
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作者：
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通讯作者：
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