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首页> 外文期刊>Journal of Experimental Botany >Barley (Hordeum vulgare) circadian clock genes can respond rapidly to temperature in an EARLY FLOWERING 3-dependent manner
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Barley (Hordeum vulgare) circadian clock genes can respond rapidly to temperature in an EARLY FLOWERING 3-dependent manner

机译：大麦（大麦）生物钟基因可以以早花3依赖的方式快速响应温度

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摘要

In barley, GIGANTEA and the PSEUDO RESPONSE REGULATOR clock genes respond rapidly to temperature in an EARLY FLOWERING 3-dependent manner.An increase in global temperatures will impact future crop yields. In the cereal crops wheat and barley, high temperatures accelerate reproductive development, reducing the number of grains per plant and final grain yield. Despite this relationship between temperature and cereal yield, it is not clear what genes and molecular pathways mediate the developmental response to increased temperatures. The plant circadian clock can respond to changes in temperature and is important for photoperiod-dependent flowering, and so is a potential mechanism controlling temperature responses in cereal crops. This study examines the relationship between temperature, the circadian clock, and the expression of flowering-time genes in barley (Hordeum vulgare), a crop model for temperate cereals. Transcript levels of barley core circadian clock genes were assayed over a range of temperatures. Transcript levels of core clock genes CCA1, GI, PRR59, PRR73, PRR95, and LUX are increased at higher temperatures. CCA1 and PRR73 respond rapidly to a decrease in temperature whereas GI and PRR59 respond rapidly to an increase in temperature. The response of GI and the PRR genes to changes in temperature is lost in the elf3 mutant indicating that their response to temperature may be dependent on a functional ELF3 gene.
机译：在大麦中，GIGANTEA和PSEUDO RESPONSE REGULATOR时钟基因以3早期依赖的方式快速响应温度，全球温度升高将影响未来的农作物产量。在谷物作物中，小麦和大麦的高温加速了生殖发育，减少了每株植物的谷物数量和最终的谷物产量。尽管温度和谷物产量之间存在这种关系，但尚不清楚哪些基因和分子途径介导了温度升高的发育响应。植物生物钟能够响应温度变化，对于光周期依赖的开花非常重要，因此控制谷物作物温度响应的潜在机制也很重要。这项研究检查了温度，昼夜节律和大麦（大麦）的开花时间基因表达之间的关系。大麦是一种温带谷物的作物模型。在一定温度范围内测定了大麦核心生物钟基因的转录水平。核心时钟基因CCA1，GI，PRR59，PRR73，PRR95和LUX的转录水平在较高温度下会增加。 CCA1和PRR73对温度降低快速响应，而GI和PRR59对温度升高快速响应。 GI3和PRR基因对温度变化的响应在elf3突变体中丢失，表明它们对温度的响应可能取决于功能性ELF3基因。

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