Altered redox processes, defense responses, and flowering time are associated with survival of the temperate Camelina sativa under subtropical conditions
Altered redox processes, defense responses, and flowering time are associated with survival of the temperate Camelina sativa under subtropical conditions
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氧化还原过程、防御反应和开花时间的改变与温带亚麻荠在亚热带条件下的生存有关
DOI：
10.1016/j.envexpbot.2020.104132
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发表时间：
2020-09
影响因子：
5.7
通讯作者：
Cui Fuqiang
中科院分区：
文献类型：
--
作者：
Wang Shunbin;Guo Peng;Li Xiaoxiao;Wu Minggen;Overmyer Kirk;Liu Shenkui;Cui Fuqiang
与全球变暖相关的零星和不可预测的极端高温天气事件已成为一个日益严重的问题，并且难以在自然野外条件下进行测试。在这项研究中，我们利用亚热带夏季模拟极端炎热的天气在现实的田间条件下测试耐热性的冷适应紧急油料作物，亚麻荠。利用正向遗传筛选技术，对山茶属的耐热基因型进行了筛选，获得了3个亚热带耐夏突变体。这些突变体是晚花的，并且表现出关键开花基因FLOWER LOCUS C和FLOWER LOCUS T的表达改变。通过RNA-seq分析发现，氧化还原和防御相关基因在这些突变体的上调基因中显著富集。一致地，观察到过氧化氢产生减少和对真菌病原体的抗性增强。总之，我们的研究结果表明，培育温带作物以适应亚热带，开花时间，抗氧化能力和防御信号可能是潜在的目标。
Sporadic and unpredictable extreme hot weather events associated with global warming have been an increasingly serious problem and are difficult to test under natural field conditions. In this study, we used subtropical summer to mimic extreme hot weather under realistic field conditions to test for heat tolerance in the cold-adapted emergent oil crop,Camelina sativa. Utilizing a forward genetic screen,Camelinawas screened for heat-adapted genotypes, resulting in the identification of threesubtropical summer tolerant(sst) mutants. Thesstmutants were late flowering and exhibited altered expression of the key flowering genesFLOWER LOCUS C and FLOWER LOCUS T. With RNA-seq assay, it was found that redox and defense related genes were significantly enriched in the up-regulated genes of thesstmutants. Consistently, reduced hydrogen peroxide production and enhanced resistance to a fungal pathogen were observed. Overall, our results suggested that to breed temperate crops to adapt to the subtropics, flowering time, antioxidant ability, and defense signaling could be the potential targets.
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