Heat Shock Tolerance in Deschampsia antarctica Desv. Cultivated in vitro Is Mediated by Enzymatic and Non-enzymatic Antioxidants.
Heat Shock Tolerance in Deschampsia antarctica Desv. Cultivated in vitro Is Mediated by Enzymatic and Non-enzymatic Antioxidants.
复制标题
南亚发草的热激耐性体外培养是由酶和非酶抗氧化剂介导的。
DOI：
10.3389/fpls.2021.635491
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发表时间：
2021
影响因子：
5.6
通讯作者：
Zúñiga GE
中科院分区：
文献类型：
--
作者：
Cortés-Antiquera R;Pizarro M;Contreras RA;Köhler H;Zúñiga GE
亚洲发草是寒地最成功的定殖种。近年来，由于气候变化，南极洲的热浪频率增加，2020年夏季出现异常高温。然而，D.南极洲正在积极应对这些事件，在整个南极半岛的数量和规模都在增加。本工作研究了D.评价了在体外（15 ± 1 ℃）生长的植物和经受两次热激处理（23 ℃和35 ℃）的植物。结果表明，D.在体外生长的青蒿能够耐受热激处理;其形态没有可见的损伤，或者其氧化状态和光合性能没有变化。这些耐受性反应主要由酶和非酶抗氧化系统的有效作用介导，这些抗氧化系统在较高温度下维持氧化还原平衡。据推测，这些机制也在自然条件下，当暴露于环境压力的植物中运作。
Deschampsia antarctica Desv, is the most successful colonizing species of a cold continent. In recent years due to climate change, the frequency of heat waves has increased in Antarctica, registering anomalous high temperatures during the summer of 2020. However, the populations of D. antarctica are responding positively to these events, increasing in number and size throughout the Antarctic Peninsula. In this work, the physiological and biochemical responses of D. antarctica plants grown in vitro (15 ± 1°C) and plants subjected to two heat shock treatments (23 and 35°C) were evaluated. The results obtained show that D. antarctica grown in vitro is capable of tolerating heat shock treatments; without showing visible damage to its morphology, or changes in its oxidative state and photosynthetic performance. These tolerance responses are primarily mediated by the efficient role of enzymatic and non-enzymatic antioxidant systems that maintain redox balance at higher temperatures. It is postulated that these mechanisms also operate in plants under natural conditions when exposed to environmental stresses.
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