通过in situ超光谱反射感应,光谱植被指数和机器学习来表型棉叶叶绿素
Kelly R Thorp1,2, Alison L Thompson2,3, Matthew T Herritt2
1United States Department of Agriculture (USDA), Agricultural Research Service (ARS), Grassland Soil and Water Research Laboratory, Temple, TX, United States.
Frontiers in plant science
|December 6, 2024
概括
这项研究评估了光谱植被指数 (SVI) 和机器学习方法 (MLM) 来估计棉花叶叶. SVI为高通量表型提供了实用,一致的结果,而MLM显示了开发更强大的指数的潜力.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 遥感 遥感 遥感 遥感
背景情况:
- 棉花叶的叶绿素对应激耐受性和繁殖选择至关重要.
- 使用超光谱传感的高通量场表型化对于快速的叶绿素查是必要的.
研究的目的:
- 部署一个基于车的光谱辐射仪来测量棉花叶的反射.
- 评估148种光谱植被指数 (SVI) 和14种机器学习方法 (MLM) 用于估计叶子叶绿素.
主要方法:
- 在四个生长季节收集了光谱反射率数据和叶子组织样本.
- 使用实验室分析测量了叶子中的叶绿素a,b和a+b.
- 评估的SVI和MLM,包括光谱衍生物和组合方法,用于叶绿素估计.
主要成果:
- 在单独的数据集上训练的MLM显示出较差的可转移性 (例如,r2=0.46).
- 在组合数据上训练的模型提高了性能 (例如,r2=0.88),但超出研究条件的概括是不确定的.
- 在某些方面,SVI提供了一致的错误指标 (例如,r2=0.69),并且在某些方面表现优于MLM.
- 集体MLM和神经网络在MLM中表现最好,光谱衍生品和红边SVI是关键输入.
结论:
- 由于其一致性,SVI对于高吞吐量表型化是非常实用的.
- 多媒体市场显示出数据挖掘的前景,以开发更强大的叶绿素估计指数.
- 需要进一步的研究,以提高棉花叶叶叶绿素估计的MLM的概括性.
更多相关视频
06:28Author Spotlight: Unraveling Plant Responses to Abiotic Stresses Using the PlantScreen Robotic Platform
Published on: June 7, 2024
1.7K
10:20Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses
Published on: August 9, 2019
12.6K
相关概念视频
Light Acquisition
8.4K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
8.4K
Key Elements for Plant Nutrition
18.6K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
18.6K
Photoreceptors and Plant Responses to Light
20.2K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
20.2K
