Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/50209
標題: Evaluation of plant seedling water stress using dynamic fluorescence index with blue LED-based fluorescence imaging
作者: Hsiao, S.C.
王豐政
Chen, S.M.
Yang, I.C.
Chen, C.T.
Tsai, C.Y.
Chuang, Y.K.
Wang, F.J.
Chen, Y.L.
Lin, T.S.
Lo, Y.M.
關鍵字: Chlorophyll fluorescence
Fluorescence image
Fluorescence index
Water
stress
laser-induced fluorescence
chlorophyll fluorescence
photosynthetic
activity
sensitive indicator
red fluorescence
leaves
system
reflectance
spectra
green
期刊/報告no:: Computers and Electronics in Agriculture, Volume 72, Issue 2, Page(s) 127-133.
摘要: A dynamic fluorescence image index system capable of non-destructive assessment of water stress in cabbage seedlings was developed. The quenching curves of chlorophyll fluorescence characteristic to the plant's water stress status under reduced excitation energy were acquired via a multispectral imaging system. The dynamic fluorescence index (DR), a fluorescence index derived from quantitative modeling of the quenching curves in this study, was found superior to conventional indices such as the fluorescence decrease ratio (Rfd) in evaluating water stress status in cabbage seedlings, with respect to due mainly to its significantly reduced measuring time and enhanced precision of the chlorophyll fluorescence responses. The best results of the quantitative model to predict water stress status of seedlings using the dynamic fluorescence index were r = 0.944 and SEE = 0.286 MPa using the 720 nm channel. The blue (460 nm) LED-excited fluorescence multispectral imaging system (FMSIS) coupled with DFI provides a powerful research tool for plant physiology studies as well as for improving greenhouse and agriculture management practices where quantitative assessment of water potential in leafy plants is critical. (C) 2010 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/11455/50209
ISSN: 0168-1699
文章連結: http://dx.doi.org/10.1016/j.compag.2010.03.005
Appears in Collections:生物產業機電工程學系

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