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使用先进的成像技术量化对玉米表型的毒性影响.

Lóránt Szőke1,2, Brigitta Tóth2, Tomislav Javornik3,4

  • 1Department of Plant Nutrition University of Zagreb Faculty of Agriculture Zagreb Croatia.

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酸性土壤中的 (Al) 毒性阻碍了作物生长. 这项研究表明,遥感和叶绿素光成像可以检测Al压力对玉米的影响,有助于土壤绘图和育种耐受性.

关键词:
Al 有毒性 毒性 毒性叶绿素的光效应 叶绿素的光玉米玉米玉米玉米玉米这是光谱反射率.植被指数 植被指数

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科学领域:

  • 植物生理学 植物生理学
  • 农业学是一种农业学.
  • 遥感 遥感 遥感 遥感

背景情况:

  • 土壤酸度 (pH <5.5) 导致 (Al) 毒性,限制农业生产力.
  • 毒性主要影响植物根,但也会引起可观察到的发芽症状.
  • 开发量化Al毒性影响的方法对于作物管理和育种至关重要.

研究的目的:

  • 评估叶绿素光成像,多光谱成像和3D多光谱扫描以量化玉米中的Al毒性.
  • 识别敏感的表型特征,表明玉米幼苗中的Al压力.

主要方法:

  • 在13天内,在pH值为4.0的营养溶液中,玉米幼苗暴露在不同度的Al (0400μM) 中.
  • 测量包括植物生长,光谱反射率 (可见和近红外) 和叶绿素光.
  • 在开始Al治疗后的四个时间点 (4,6,11和13天) 收集数据.

主要成果:

  • 减少植物生长和增加可见波长反射率是Al毒性的早期指标 (到第4天).
  • 红波长反射率的增加导致了正常化差异植被指数和绿叶指数的下降.
  • 实际的PSII量子产量和光化学火系数是长时间Al暴露 (11日) 影响的敏感叶绿素光特征.

结论:

  • 通过遥感和叶绿素光成像测量可测量的表型特征对于量化对玉米的Al毒性影响是有效的.
  • 这些技术可以用于绘制Al-有毒土壤的地图,以及对Al-耐受性玉米基因型的高通量选.