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Reflectance measurements of cotton leaf senescence altered by mepiquat chloride
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Escobar, D. E. Gausman, H. W. |
| Copyright Year | 1982 |
| Description | Spectrophotometric reflectance measurements were made on plant-attached leaves to evaluate growth chamber-grown cotton leaf (Gossypium hirsutum L.) senescence (chlorophyll degradation as criterion) that was delayed by mepiquat chloride (1,1-dimethylpiperidinium chloride) rates of 0, 10, 40, 70, and 100 g a.i./ha. Mepiquat chloride (MC increased both chlorophyll and leaf water contents as compared with that of untreated leaves. Reflectance was inversely and linearly correlated (r = -0.873**) with eater content at the 1.65 micrometer wavelength and was inversely correlated (r = -0.812**) with chlorophyll concentration at the 0.55 micrometer wavelength but best fit a quadratic equation. Either wavelength measurement might be useful to remotely detect cotton leaf senescence or fields of MC-treated cotton plants. |
| File Size | 5172426 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19840011892 |
| Archival Resource Key | ark:/13960/t89h0gm38 |
| Language | English |
| Publisher Date | 1982-02-01 |
| Access Restriction | Open |
| Subject Keyword | Earth Resources And Remote Sensing Leaves Spectrophotometers Earth Resources Program Agristars Project Moisture Content Plant Stress Chlorides Signature Analysis Cotton Vegetation Growth Chlorophylls Spectral Reflectance Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
