Abstract
A portable chlorophyll meter was calibrated with extractable chlorophyll measurements from six corn (Zea mays L.) hybrids, and the utility of the meter in identifying differences in leaf greenness was assessed in growth-cabinet and field studies. A single linear regression described the relationship between meter readings and extractable chlorophyll concentration for leaves of all hybrids at a range of growth stages (r2 = 0.83). Meter measurements resolved differences in chlorophyll concentration of two additional test hybrids resulting from different temperature regimes in the growth-cabinet, and from different leaf positions and stages of development in the field (P < 0.01). Considerable replication of meter readings was found necessary to resolve treatment differences in chlorophyll concentration. Caution is advised in using the calibration at very low chlorophyll concentrations such as those occurring as the plant nears senescence. Key words: SPAD 501, chlorophyll, leaf senescence, linear regression
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
