<br>使用便携式拉曼光谱仪阐明成熟长芒苋 (Amaranthus palmeri) 叶子的性别,RSC Advances

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使用便携式拉曼光谱仪阐明成熟长芒苋 (Amaranthus palmeri) 叶子的性别
RSC Advances ( IF 3.9 ) Pub Date : 2024-01-08 , DOI: 10.1039/d3ra06368b
Aidan P Holman _{1,

2} , Nicolas K Goff _{2,

3} , Isaac D Juárez ₂ , Samantha Higgins ₂ , Axell Rodriguez ₂ , Muthukumar Bagavathiannan ₄ , Dmitry Kurouski _{2,

5} , Nithya Subramanian ₄

Affiliation

长芒苋 ( Amaranthus palmeri ) 是一种普遍存在且麻烦的杂草物种，对美国农业构成重大挑战。由于雄性和雌性植物表现出不同的特征和繁殖策略，识别长芒苋植物的性别对于制定量身定制的控制措施至关重要。传统的性别测定方法既昂贵又耗时，但光谱技术的最新进展提供了新的可能性。本研究探讨了便携式拉曼光谱在田间确定成熟长芒苋植物性别的潜力。植物叶子的拉曼分析揭示了与硝酸盐、脂质、类胡萝卜素和萜类化合物相关的光谱差异，从而可以高精度和可靠地识别植物的性别；与雌性植物相比，雄性植物中这些化合物的浓度更高。研究还发现，与雌性植物相比，雄性植物中这些化合物的浓度更高。使用机器学习工具偏最小二乘判别分析 (PLS-DA) 对拉曼光谱进行分析，从获得的光谱中阐明性别时，准确率不低于 83.7%。这些发现提供了对长芒苋性别特异性特征的深入了解，并表明拉曼分析与 PLS-DA 相结合，可以成为一种有前景、非破坏性且有效的田间性别测定方法。这种方法对于制定针对特定性别的管理策略来监测和控制现实环境中的这种入侵杂草具有重要意义，使农民、农艺师、研究人员和园艺大师受益。

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Elucidation of sex from mature Palmer amaranth (Amaranthus palmeri) leaves using a portable Raman spectrometer

Palmer amaranth (Amaranthus palmeri) is a pervasive and troublesome weed species that poses significant challenges to agriculture in the United States. Identifying the sex of Palmer amaranth plants is crucial for developing tailored control measures due to the distinct characteristics and reproductive strategies exhibited by male and female plants. Traditional methods for sex determination are expensive and time-consuming, but recent advancements in spectroscopic techniques offer new possibilities. This study explores the potential of portable Raman spectroscopy for determining the sex of mature Palmer amaranth plants in-field. Raman analysis of the plant leaves reveals spectral differences associated with nitrate salts, lipids, carotenoids, and terpenoids, allowing for high accuracy and reliable identification of the plant's sex; male plants had higher concentrations of these compounds compared to females. It was also found that male plants had higher concentrations of these compounds compared to the females. Raman spectra were analyzed using a machine learning tool, partial least squares discriminant analysis (PLS-DA), to generate accuracies of no less than 83.7% when elucidating sex from acquired spectra. These findings provide insights into the sex-specific characteristics of Palmer amaranth and suggest that Raman analysis, combined with PLS-DA, can be a promising, non-destructive, and efficient method for sex determination in field settings. This approach has implications for developing sex-specific management strategies to monitor and control this invasive weed in real-world environments, benefiting farmers, agronomists, researchers, and master gardeners.

更新日期：2024-01-08

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