Abstract Details
(2020) Earth's Natural Fertilizer: Foliar Uptake of Insoluble Phosphorus from Desert Dust Stimulate Plant Growth
Gross A
https://doi.org/10.46427/gold2020.885
The author has not provided any additional details.
13d: Room 4, Wednesday 24th June 08:09 - 08:12
Avner Gross
View abstracts at 5 conferences in series
Listed below are questions that have been submitted by the community that the author will try and cover in their presentation. To submit a question, ensure you are signed in to the website. Authors or session conveners approve questions before they are displayed here.
Submitted by Julie Pett-Ridge on Wednesday 24th June 03:17
Super interesting presentation! thanks for sharing. -Julie Pett-Ridge
Thanks Julie! Our next step is to look if tropical plants, which often grow on extremely P deficient soils, can make use of dust P via foliar uptake (in relation to the mega Saharan dust storm in the Caribbean this week!). We plan to do a field + green house experiment. First indications shows that some tropical plants can accumulate 2-3 times more dust on their leaves than the average Mediterranean plants.
Super interesting presentation! thanks for sharing. -Julie Pett-Ridge
Thanks Julie! Our next step is to look if tropical plants, which often grow on extremely P deficient soils, can make use of dust P via foliar uptake (in relation to the mega Saharan dust storm in the Caribbean this week!). We plan to do a field + green house experiment. First indications shows that some tropical plants can accumulate 2-3 times more dust on their leaves than the average Mediterranean plants.
Submitted by Mengqiang Zhu on Wednesday 24th June 08:03
Hi Avner, I agree with Julie. It is an excellent work and very interesting study. I have couple of questions. 1) Could you explain why the residual P was almost completely removed on the chickpea leaves? What would be the possible mechanisms? 2) How was the pH of the leaf surface was measured. Best, Mike
Hi Avner, I agree with Julie. It is an excellent work and very interesting study. I have couple of questions. 1) Could you explain why the residual P was almost completely removed on the chickpea leaves? What would be the possible mechanisms? 2) How was the pH of the leaf surface was measured. Best, Mike
Submitted by avner gross on Wednesday 24th June 08:52
Hi Mike, 1.) We see that the pH on the leaf surface is very low, around 3, which may explain some of the dissolution of residual P. Also P solubilizing organic acids were released to the leaf surface which also had an impact. We think that most of the P taken by the plant came from more labile forms, not necessarily from the residual P, but part of the residual P was released and moved to the Ca-P fraction to "fill in" the place of the P that was taken by the plant. 2.) We measured the pH with flat top pH electrode with attached to a solid interface below the leaf to hold it flat and steady. It is very simple and work well!
Hi Mike, 1.) We see that the pH on the leaf surface is very low, around 3, which may explain some of the dissolution of residual P. Also P solubilizing organic acids were released to the leaf surface which also had an impact. We think that most of the P taken by the plant came from more labile forms, not necessarily from the residual P, but part of the residual P was released and moved to the Ca-P fraction to "fill in" the place of the P that was taken by the plant. 2.) We measured the pH with flat top pH electrode with attached to a solid interface below the leaf to hold it flat and steady. It is very simple and work well!
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