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光足以弥补随机定位机模拟的植物根中的微重力

Rakesh David¹, Apriadi Situmorang², Nam Nghiep Tran^3,4

¹School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA, Australia. rakesh.david@adelaide.edu.au.

NPJ microgravity

|July 2, 2025

概括

植物根可以通过使用光来代替重力在空间中垂直生长. 这项研究发现,即使是低水平的白光也可以在模拟的微重力中引导根生长,为太空农业提供了一个有希望的解决方案.

科学领域:

植物生物学植物生物学
太空农业太空农业
引力生物学引力生物学

背景情况:

太空任务需要可持续的粮食生产,需要研究微重力中的植物生长.
确保在低重力环境下垂直根生长是基于太空的农业面临的重大挑战.

研究的目的:

调查光作为重力的替代品在引导植物根生长中的潜力.
开发和验证基于地球的模拟器,用于模拟微重力条件和测试光响应.

主要方法:

使用一个3D打印的迷你光子,在随机定位机 (RPM) 上配备可调节的LED,以模拟微重力.
暴露阿拉比多普西斯根在黑暗和光明条件下模拟微重力,以观察根形态和生长方向.
测试了不同强度和波长的光 (白色和红色) 以确定它们在引导根生长方面的有效性.

主要成果:

在黑暗中模拟的微重力导致Arabidopsis根失去垂直方向并表现出改变的形态.
10 μmol m-2 s-1 的白光有效地弥补了模拟的微重力,恢复了正常的根生长方向.
红光的效果不如白光,而较低强度的白光 (1μmol m−2 s−1) 的效果明显不如白光.

结论:

光能有效地取代重力,引导植物根的生长,即使在低强度下也是如此.
开发的RPM-mini-phytotron系统是一个可行的和具有成本效益的模拟器,用于在模拟微重力下研究根引力.
研究结果表明,在空间生长设施中暴露于光线可以确保粮食作物的正常根部发育,只要保持足够的光线水平.

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