Rice roots can release phytosiderophores such as MA in response to Fe deficiency. Is it possible to inhibit either the synthesis or the release of such compounds?
I am not specialist in this field; you may ask to my niece: Camille Larue, specialist in vegetal physiology
You can treat the plants by aminooxyacetic acid, an inhibitor of nicotianamine aminotransferase which is an essential enzyme for biosynthesis of phytosiderophore.
I think that treatment with aminooxyacetic acid have also effect on ethylene production, as well as on activity of many difefrent enzymes. I would suggest to use medium with low nitrogen contents to inhibit phytosiderophores realization.
Many thanks for your replies, both suggestions seem very promising. Which treatment would least interfere with Zn uptake, in your opinion?
ethylene it acts as a inhibitor to plant growth. As its level increses on aging of sesonal plants or on maturation of fruits of perrenial fruit plants.
In barley and maize 2h root incubation of roots in solutions of 100 µM anthracene-9-carboxylic acid (anion channel inhibitor) or the vesicle transport inhibitor Brefeldin A (barley only) were able to inhibit PS release by more than 90%
One response asked about effects on Zn uptake. In rice, there are two membrane Zn transporters which accumulate Zn. These is little evidence that phytosiderophores play a significant role in Zn uptake by grasses, especially in rice where must of the Fe uptake is ferrous uptake from reduced/flooded soils.
If you need a specific response more than already listed, you should contact Dr. N.K. Nishizawa who leads the research team in Japan which has published much work on phytosiderophore production, secretion, uptake and utilization. Her email is: Nishizawa, Naoko
Rufus Chaney
Beltsville, MD
- Badges
- Science topic
- Similar topics
- Biological Science
- Anatomy
- Tissue