Yield uplift technology for seed

Key benefits of Symiro

• Significant yield increase of 5.6% demonstrated in field trials
• Increases nodule numbers, leading to improved nitrogen fixation
• Promotes plant cell division and expansion
• Improves photosynthesis
• Safe for germination

How does Symiro work?

Symiro contains a naturally occurring compound known to be secreted by rhizobia for plant signalling. This has several effects.

Firstly, the plant cells make more sugars available to the rhizobia. Secondly, the plant increases root respiration, which in turn increases CO2 availability for the rhizobia. Other compounds thought to be useful to the rhizobia are also synthesised by the plant. As a result of these processes, nodulation, and therefore nitrogen fixation, is increased.

As well as benefitting the rhizobia, Symiro is also thought to enhance plant growth more directly, through the promotion of cell division and expansion, as well as through the enhancement of leaf photosynthesis. These effects can be particularly beneficial during the growing phase of the plant, improving overall plant health and development.

Proven yield uplift in soybean

Symiro technology has been tested across four years of rigorous field trials, both as a standalone compound and incorporated into our finished product InSync™ Plus. Field trials conducted in Brazil showed that InSync Plus gave a 241 kg/ha (5.6%) yield uplift compared to the control when averaged over 15 locations, each with 6 replications. The difference was statistically significant (P<0.001).

Symiro effect on nodule number

Nodule formation is an important factor in legume productivity, directly impacting nitrogen uptake and yield. The effect of incorporating Symiro technology onto soybean seeds has been shown to significantly (P<0.001) affect nodule number. However, the effect is very concentration-dependent. At the optimal concentration (labelled C on the graph), nodulation was increased by 40%. The overall biomass also increased, showing that Symiro can improve nitrogen fixation and therefore stimulate plant growth.