Abstract
Leaf movement together with growth of vegetables was continuously measured by two video cameras and a three-dimensional image processing system. In the experiment, the leaf movement of spinach (Spinacia oleracea L. cv. “Lead”) from 10 to 24 days after seeding in two different photosynthetic photon flux densities (PPFD) was observed.A diurnal movement in spinach leaves was observed of both high and low PPFD. Spinach folded all the leaves in the dark period and spread the leaves in the light period. The amplitude of the diurnal movement showed a tendency to increase with high PPFD and increasing growth of the leaf blade. An irregular falling-rising movement due to infirm growth and a periodical swing movement with 3 hours on several leaves was also observed at low PPFD.It is considered that the physiological condition of spinach affects the kind and amplitude of the movement. The experimental results indicate that the measurement of the movement is a possible method to monitor vegetable growth in environmental control systems.
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.
