偏红色光对红色和绿色光的依赖,增加了生菜的生长
1Department of Horticulture, Michigan State University, East Lansing, Michigan, United States of America.
PloS one
|November 15, 2024
概括
远红色的光可以促进生长和叶面积,但只能达到一定比例. 超过25%远红光,新鲜的质量积聚高原,植物质量下降,即使增加了叶面积.
科学领域:
- 植物生理学 植物生理学
- 园艺科学 园艺科学
- 摄影生物学 摄影生物学
背景情况:
- 远红色 (FR) 光,在传统的光合作用活性辐射 (PAR) 范围之外,可以增强光合作用并诱导避阴反应,促进植物生长.
- 红光对生长的特殊影响,特别是当红光或绿光的波长被替换时,需要进一步研究.
研究的目的:
- 调查用远红 (FR) 光替代红色或绿色光线如何影响红叶和绿叶菜中芽生物质的积累.
- 在特定的光照条件下,确定FR光的最佳分数,以最大限度地提高生菜的新鲜质量和叶面积.
主要方法:
- 菜品种 (红叶和绿叶Lactuca sativa) 在固定的总光子流密度 (PFD) 下生长,红色,绿色和FR光的分数各不相同,以及恒定的蓝光PFD.
- 该研究分析了不同光谱对叶面积,新鲜质量 (FM),植物直径和整体植物质量的影响.
主要成果:
- 用FR光取代红光,这两种生菜品种的叶面积都增加了.
- 最大的新鲜质量 (FM) 是通过约0.25的FR分数 (FR/(R+FR)) 实现的.
- 在较高的FR分数下,FM没有进一步增加,尽管叶面积增加,但植物质量恶化.
结论:
- 一种包含高达25%远红色光子的光谱可以在中度光强度和蓝光PFD下增强叶面积和生菜中的生物量.
- 超过这个最佳分数的FR光的增加不会改善新鲜质量,并可能对植物质量产生负面影响.
- 与FR光相比,绿光对叶子扩张和FM的影响较小.
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