期刊
PLANTS-BASEL
卷 10, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/plants10020310
关键词
hyperspectral imaging; sunscald; scab; vegetation indices; pigments
资金
- Ministry of Science and Higher Education of the Russian Federation for large scientific projects in priority areas of scientific and technological development [075-15-2020-774]
Recent technical progress has made it possible to obtain spatially resolved spectral information on plants using imaging hyperspectrometers (IH), but extracting meaningful information from hyperspectral images is challenging due to the inherent complexity of plant tissue and canopy optics.
Reflected light carries ample information about the biochemical composition, tissue architecture, and physiological condition of plants. Recent technical progress has paved the way for affordable imaging hyperspectrometers (IH) providing spatially resolved spectral information on plants on different levels, from individual plant organs to communities. The extraction of sensible information from hyperspectral images is difficult due to inherent complexity of plant tissue and canopy optics, especially when recorded under ambient sunlight. We report on the changes in hyperspectral reflectance accompanying the accumulation of anthocyanins in healthy apple (cultivars Ligol, Gala, Golden Delicious) fruits as well as in fruits affected by pigment breakdown during sunscald development and phytopathogen attacks. The measurements made outdoors with a snapshot IH were compared with traditional point-type reflectance measured with a spectrophotometer under controlled illumination conditions. The spectra captured by the IH were suitable for processing using the approaches previously developed for point-type apple fruit and leaf reflectance spectra. The validity of this approach was tested by constructing a novel index mBRI (modified browning reflectance index) for detection of tissue damages on the background of the anthocyanin absorption. The index was suggested in the form of mBRI = (R-640(-1) + R-800(-1)) - R-678(-1). Difficulties of the interpretation of fruit hyperspectral reflectance images recorded in situ are discussed with possible implications for plant physiology and precision horticulture practices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据