Stress memory induced rearrangements of HSP transcription, photosystem II photochemistry and metabolism of tall fescue (Festuca arundinacea Schreb.) in response to high-temperature stress.
Stress memory induced rearrangements of HSP transcription, photosystem II photochemistry and metabolism of tall fescue (Festuca arundinacea Schreb.) in response to high-temperature stress.
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DOI：
10.3389/fpls.2015.00403
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发表时间：
2015
影响因子：
5.6
通讯作者：
Fu JM
中科院分区：
文献类型：
--
作者：
Hu T;Liu SQ;Amombo E;Fu JM
植物在受到胁迫前会产生一些稳定的信号和生理反应，这些信号和生理反应可能被称为“胁迫记忆”。然而，目前关于植物胁迫记忆反应机制的研究还不多。在这里，两个高羊茅基因型，耐热PI 574522和热敏PI 512315，进行反复高温预驯化处理。两个热休克蛋白（HSP）基因，LMW-HSP和HMW-HSP，表现出转录记忆，其较高的转录丰度在一个或多个后续的压力（S2，S3，S4）相对于第一个压力（S1），和基础转录水平在恢复状态（R1，R2，R3）。两个可训练基因激活的转录记忆可持续4天，并诱导高羊茅更高的耐热性。这是证实了更大的草皮质量和较低的电解质泄漏。预驯化处理抑制了两种高羊茅基因型光系统II活性反应中心（PSII RC）O-J-I-P和能量传递通量的下降。热胁迫记忆与叶片代谢产物谱的主要变化有关。此外，有一个专属的增加叶有机酸（柠檬酸，苹果酸，三磷酸，苏糖酸），糖（蔗糖，葡萄糖，艾杜糖，阿洛糖，塔罗糖，葡庚糖，塔格糖，阿洛酮糖），氨基酸（丝氨酸，脯氨酸，焦谷氨酸，甘氨酸，丙氨酸），和一种脂肪酸（丁酸）在预驯化的植物。这些涉及转录记忆、PSII RC能量转运和代谢产物谱的观察结果可能为植物高温响应过程提供新的见解。
When plants are pre-exposed to stress, they can produce some stable signals and physiological reactions that may be carried forward as “stress memory”. However, there is insufficient information about plants' stress memory responses mechanisms. Here, two tall fescue genotypes, heat-tolerant PI 574522 and heat-sensitive PI 512315, were subjected to recurring high-temperature pre-acclimation treatment. Two heat shock protein (HSP) genes, LMW-HSP and HMW-HSP, exhibited transcriptional memory for their higher transcript abundance during one or more subsequent stresses (S2, S3, S4) relative to the first stress (S1), and basal transcript levels during the recovery states (R1, R2, and R3). Activated transcriptional memory from two trainable genes could persist up to 4 days, and induce higher thermotolerance in tall fescue. This was confirmed by greater turf quality and lower electrolyte leakage. Pre-acclimation treatment inhibited the decline at steps of O-J-I-P and energy transport fluxes in active Photosystem II reaction center (PSII RC) for both tall fescue genotypes. The heat stress memory was associated with major shifts in leaf metabolite profiles. Furthermore, there was an exclusive increase in leaf organic acids (citric acid, malic acid, tris phosphoric acid, threonic acid), sugars (sucrose, glucose, idose, allose, talose, glucoheptose, tagatose, psicose), amino acids (serine, proline, pyroglutamic acid, glycine, alanine), and one fatty acid (butanoic acid) in pre-acclimated plants. These observations involved in transcriptional memory, PSII RC energy transport and metabolite profiles could provide new insights into the plant high–temperature response process.
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影响因子：
5.3
作者：
Li Q;Chen LS;Jiang HX;Tang N;Yang LT;Lin ZH;Li Y;Yang GH
通讯作者：
Yang GH
影响因子：
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作者：
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7.4
作者：
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