Interesting question. Stage of growth is important to collect root exudates. It may vary from plant to plant.

Steven L. Larson, Suresh K Malhotra thank you for your contributions, they are noted. I hope more researchers can join in the discussion.

I think, it would be best to collect soil samples and root exudates at critical growth period of the crops. Normally it comes between 4 and 8 weeks of the crop growth depends on the type of crop and cultivar.

I'm going to collect the root exudates of rice during the flowering stage, but I don't know whether it si right.

Sería interesante que recogiera los datos antes y después de la floración para que pueda comparar.

How can i collect the root exudates in the lab ?

Soha Sabry I would suggest to get a Rhizon sampler. Then this would depend on your experimental set up. There are studies that outline ways of collecting root exudates.

The same work and still searching for the best technique on cucumber resistant rootstocks

Interesting questions and stage will be decided as per the hypothesis and plan but exudates are easily collected directly from the trees with no harm to the plant and leaving no doubt about their botanical identity. Occasionally we use more forceful methods, such as carefully microwaving wood slabs to extract the exudates, then letting them resolidify. Root exudates contain a wide variety of molecules released by the plant into the soil. They act as a signaling messenger that allows for communication between soil microbes and plant roots. Exudates influence several factors within the soil such as nutrient availability, soil pH, and recruitment of bacteria and fungi. hanges in the volume and nature of exudate provide information on the underlying state of the wound and may give an indication of an increasing bacterial load and the presence of infection, and if a wound is likely to proceed to healing.