远红光和温度对生长和生态形态的相互作用效应在高光强度下会减弱
Sang Jun Jeong1,2, Qianwen Zhang2,3, Genhua Niu2
1Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States.
Frontiers in plant science
|December 17, 2024
概括
远红光和温度相互作用,影响植物生长,但这些影响在较高的光强度下减弱. 最佳的生菜产量和抗氧化能力是在高光,高温和深红光下实现的.
科学领域:
- 植物生理学 植物生理学
- 摄影形态生成 (Photomorphogenesis) 是一种光变的过程.
- 园艺科学 园艺科学
背景情况:
- 植物染色体 (PHY) 通过光转换和热逆转调节植物对光质量和温度的反应.
- 以前的研究表明,深红 (FR) 光和温度对植物生长的相互作用影响,主要是在低光强度下.
- 光强度对这些互动效应的影响在很大程度上仍未被描述.
研究的目的:
- 研究FR光和温度对生菜生长和形态学的相互作用效应的光强度依赖性.
- 为了确定变化的总光子流量密度 (TPFD),温度和FR光水平如何影响植物生物质,叶子扩张和二次代谢物含量.
主要方法:
- 菜 ("Rex") 在受控条件下生长,TPFD变化 (150和300μmol m−2 s−1),温度 (20,24,28°C) 和FR光水平 (0%和20%).
- 测量包括叶子,茎和根的延长,叶子数量,叶子扩张,生物质,叶绿素,胡卜素,黄类,类,类和抗氧化能力.
主要成果:
- 在较低的TPFD时,FR光和温度对植物形态的相互作用影响显著,但在较高的TPFD时减弱.
- 在低TPFD下,FR光只在20°C时增强了叶子膨胀和光子捕获,而在高TPFD下,FR光增加了所有温度的叶子总面积.
- 植物生物质与被拦截的光子比光合作用活动更有强烈的相关性;FR光减少了二次代谢物,而高光和高温增加了它们.
结论:
- 随着总光强度的增加,FR光和温度对植物生长和形态的相互作用效应会减少.
- 高强度光线,温暖的温度和FR光线协同促进了生菜作物的产量,并增强了抗氧化能力.
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