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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Coincident light and clock regulation of pseudoresponse regulator protein 37 (PRR37) controls photoperiodic flowering in sorghum
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Coincident light and clock regulation of pseudoresponse regulator protein 37 (PRR37) controls photoperiodic flowering in sorghum

机译：伪响应调节蛋白37（PRR37）的光和时钟同时调节可控制高粱的光周期开花

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摘要

Optimal flowering time is critical to the success of modern agriculture. Sorghum is a short-day tropical species that exhibits substantial photoperiod sensitivity and delayed flowering in long days. Genotypes with reduced photoperiod sensitivity enabled sorghum's utilization as a grain crop in temperate zones worldwide. In the present study. Ma_1, the major repressor of sorghum flowering in long days, was identified as the pseudoresponse regulator protein 37 (PRR37) through positional cloning and analysis of SbPRR37 alleles that modulate flowering time in grain and energy sorghum. Several allelic variants of SbPRR37 were identified in early flowering grain sorghum germplasm that contain unique loss-of-function mutations. We show that in long days SbPRR37 activates expression of the floral inhibitor CONSTANS and represses expression of the floral activators Early Heading Date 1, FLOWERING LOCUS T, Zea mays CENTRORADIALIS 8. and floral induction. Expression of SbPRR37 is light dependent and regulated by the circadian clock, with peaks of RNA abundance in the morning and evening in long days. In short days, the evening-phase expression of SbPRR37 does not occur due to darkness, allowing sorghum to flower in this photoperiod. This study provides insight into an external coincidence mechanism of photoperiodic regulation of flowering time mediated by PRR37 in the short-day grass sorghum and identifies important alleles of SbPRR37 that are critical for the utilization of this tropical grass in temperate zone grain and bioenergy production.
机译：最佳的开花时间对于现代农业的成功至关重要。高粱是一种短日热带物种，在长时期内表现出相当高的光周期敏感性并延迟开花。具有降低的光周期敏感性的基因型使高粱在全世界的温带地区被用作谷物作物。在目前的研究中。通过定位克隆和分析调节谷物和能量高粱开花时间的SbPRR37等位基因，Ma_1是长日高粱开花的主要阻遏物，被鉴定为假反应调节蛋白37（PRR37）。在早期开花的谷物高粱种质中鉴定出SbPRR37的几个等位基因变体，其中包含独特的功能缺失突变。我们显示，在很长的日子里，SbPRR37激活花抑制剂CONSTANS的表达，并抑制花激活剂的表达。早期抽穗期1，花的位置T，玉米a CENTRORADIALIS 8和花的诱导。 SbPRR37的表达是光依赖性的，受昼夜节律调节，在长日中的早晨和晚上都有RNA丰度的峰值。在短时间内，由于黑暗而不会出现SbPRR37的晚上阶段表达，从而使高粱在此光周期内开花。这项研究提供了对PRR37在短日草高粱中光周期调控开花时间的外部重合机制的认识，并确定了SbPRR37的重要等位基因，这些等位基因对于在温带粮食和生物能源生产中利用这种热带草至关重要。

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    Rebecca L. Murphy; Robert R. Klein; Daryl T. Morishige; Jeff A. Brady; William L. Rooney; Frederick R. Miller; Diana V. Dugas; Patricia E. Klein; John E. Mullet;

  • 作者单位

    Department of Biochemistry and Biophysics, Texas ASM University, College Station, TX 77843;

    US Department of Agriculture-Agricultural Research Service, College Station, TX 77845;

    Department of Biochemistry and Biophysics, Texas ASM University, College Station, TX 77843;

    Texas AgriLife Research and Extension Center, Stephenville, TX 76401;

    Department of Soil and Crop Sciences, Texas A&M University, College Station, TX 77843;

    MMR Genetics, Vega, TX 79092;

    Department of Horticultural Sciences and Institute for Plant Genomics and Biotechnology, Texas A&M University, College Station, TX 77843;

    Department of Horticultural Sciences and Institute for Plant Genomics and Biotechnology, Texas A&M University, College Station, TX 77843;

    Department of Biochemistry and Biophysics, Texas ASM University, College Station, TX 77843;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
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  • 关键词

    circadian rhythm; pseudo-response regulator;

    机译：昼夜节律伪响应调节器;

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