Role of fructose in the adaptation of plants to cold-induced oxidative stress
Role of fructose in the adaptation of plants to cold-induced oxidative stress
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DOI：
10.1007/s00249-008-0260-9
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发表时间：
2008-09-01
影响因子：
2
通讯作者：
Spasojevic, I.
中科院分区：
文献类型：
--
作者：
Bogdanovic, J.;Mojovic, M.;Spasojevic, I.
本研究的结果表明，果糖、果糖6-磷酸（F6 P）和果糖1，6-二磷酸（FBP）在低温下维持植物体内平衡中具有重要作用。已知冷与光结合会刺激叶绿体中超氧化物的产生增加，导致光抑制，但也会增加可溶性糖的水平。在本研究中，氧化胁迫豌豆叶片引起的冷/光制度的PSI色素P700（P700（+））的氧化形式的水平的降低，断言。此外，还观察到抗氧化状态和果糖积累的增加。通过对果糖及其磷酸化形式的抗氧化特性的研究，探讨其在低温胁迫下对植物的保护作用。果糖，特别是F6 P和FBP表现出较高的清除超氧阴离子的能力，并表明参与豌豆叶片的抗氧化保护。这些结果与先前建立的联系相结合，暗示果糖水平的增加，通过各种途径插入到体内平衡的生理机制代表重要的非酶抗氧化防御植物在寒冷相关的压力。
This work presents findings, which indicate important role of fructose, fructose 6-phosphate (F6P), and fructose 1,6-bisphosphate (FBP) in preservation of homeostasis in plants under low temperature. Cold combined with light is known to incite increased generation of superoxide in chloroplasts leading to photoinhibition, but also an increased level of soluble sugars. In the present study, oxidative stress in pea leaves provoked by cold/light regime was asserted by the observed decrease of the level of oxidized form of PSI pigment P700 (P700(+)). Alongside, the increased antioxidative status and the accumulation of fructose were observed. The antioxidative properties of fructose and its phosphorylated forms were evaluated to appraise their potential protective role in plants exposed to chilling stress. Fructose, and particularly F6P and FBP exhibited high capacities for scavenging superoxide and showed to be involved in antioxidative protection in pea leaves. These results combined with previously established links implicate that the increase in level of fructose sugars through various pathways intercalated into physiological mechanisms of homeostasis represents important non-enzymatic antioxidative defense in plants under cold-related stress.