Black nightshade and herbicide
Two droplets of 5 microliter of metribuzin (non-systemic herbicide) are applied on two different leaves of Black Nighshade. Within 6 hours the effect of the herbicide can be observed in the Fv/Fm image (right side). Even after 70 hours the interaction of the herbicide and the leaf is not detectable in the color image (right side). The CropReporter can detect and quantify the effects of the herbicide in an early stage, which have a strong correlation with the total biomass of the plant after 14 days.
Cabbage and Xanthomonas
This cabbage seedling is exposed to the bacteria Xanthomonas. Via gutation the bacteria enters the leaf. Within 48 hours the CropReporter shows the presence of the bacteria. Visually (left image) no interaction of bacteria and leaf can be observed. The cotyledons show a low photosynthetic effiency and will not contribute much to the plant energy production.
Phytophthora and potato leaves
This example movie shows chlorophyll fluorescence images top left, color images top right, calculated Fv/Fm bottom left and calculated area with low Fv/Fm at the bottom right side of a potato leaf. The leaves were spot inoculated with phytophthora spores. The images are taken at the top side through a petri dish.
Phytophthora spot inoculation on potato leaf
This example movie shows chlorophyll fluorescence images top left, color images top right, calculated Fv/Fm bottom left and calculated area with low Fv/Fm at the bottom right side of a potato leaf. The leaf was spot inoculated with phytophthora spores at the bottom side single droplet, the images are taken at the top side through a glass cover. The color image shows necrosis around the inoculation spot, the Fv/Fm images shows a enlarged damaged area, clearly shown light blue colored at the bottom right side.
These potato leafs are infected with a fungus. You can see the fungus is spreading throughout the leafs within several hours. Whit the CropReporter you can automate these measurements and measure in real time.
Strawberry in time
These strawberries where measured over time to see if there was a difference in photosynthesis between greenhouse grown and field grown strawberries. The two strawberries on the right are grown in the greenhouse.
As the video shows even red strawberries contain chlorophyll and so you can measure these fruits to assess the ripeness by using photosynthesis measurements.