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首页> 外文期刊>Plant Growth Regulation >Interaction of red to far red light ratio and ethylene in regulating stem elongation of Helianthus annuus
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Interaction of red to far red light ratio and ethylene in regulating stem elongation of Helianthus annuus

机译：红光与远红光的比率与乙烯在调控向日葵茎伸长中的相互作用

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摘要

Sunflower (Helianthus annuus L.) stems showed increased elongation under two types of vegetative shade: canopy shade (low red to far red [R/FR] ratio) and neighbouring proximity shade (FR enrichment). Hypocotyls also elongated more under narrow-band FR light than under narrow-band R light. Ethylene levels were determined in actively elongating 7-day-old hypocotyls and 17-day-old internodes under three R/FR ratios. Ethylene levels were lower in both sunflower hypocotyls and internodes when the R/FR ratio was reduced. Both FR enrichment of normal R/FR ratio and narrow-band FR light with very low light irradiance resulted in reduction in ethylene levels in 7-day-old hypocotyls. Further, in application experiments, sunflower stems grown under low R/FR ratio were more sensitive to ethephon and less sensitive to aminoethoxyvinylglycine (AVG) than stems grown under high R/FR ratio. Low R/FR ratio appears to initiate reduction in ethylene levels in sunflower seedlings, allowing maximum stem elongation. These results, and findings of other authors, suggest that various plant species may have developed different ways of regulating stem elongation and ethylene levels in response to low R/FR ratio.
机译：向日葵（Helianthus annuus L.）茎在两种类型的植物荫下表现出增加的伸长率：冠层树荫（低红色至远红色[R / FR]比）和邻近邻近树荫（FR富集）。下胚轴在窄带FR光下比在窄带R光下伸长更多。在三个R / FR比下，主动延长7天龄下胚轴和17天龄节间的乙烯含量。当R / FR比降低时，向日葵下胚轴和节间中的乙烯含量较低。正常R / FR比的FR富集和具有很低光辐照度的窄带FR光都导致7天龄下胚轴的乙烯含量降低。此外，在应用实验中，与在高R / FR比下生长的茎相比，在低R / FR比下生长的向日葵茎对乙烯利更敏感，对氨基乙氧基乙烯基甘氨酸（AVG）的敏感性更低。低的R / FR比似乎会引发向日葵幼苗中乙烯含量的降低，从而使茎伸长最大化。这些结果以及其他作者的发现表明，响应低的R / FR比，各种植物物种可能已经开发出不同的调节茎伸长和乙烯水平的方法。

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  • 来源
    《Plant Growth Regulation》 |2007年第1期|53-61|共9页
  • 作者

    Leonid V. Kurepin; Linda J. Walton; David M. Reid;

  • 作者单位

    Department of Biological Sciences University of Calgary University Drive 2500 NW Calgary Alberta Canada T2N 1N4;

    Department of Biological Sciences University of Calgary University Drive 2500 NW Calgary Alberta Canada T2N 1N4;

    Department of Biological Sciences University of Calgary University Drive 2500 NW Calgary Alberta Canada T2N 1N4;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Ethylene; Light quality; Narrow-band light; Stem elongation;

    机译：乙烯;光质量;窄带光;茎伸长率;

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