I wonder what they're conspiring.

A couple of flagellated protists found in a garden soil.

Soil protozoa, such as these flagellates, generally feed on unicellular bacteria using some kind of catching device - a flagellum for instance.

"Most soil protozoa are bacterial feeders, although some species have developed means to get proteins from other, often larger, organisms such as fungal spores, algae, nematodes and other protozoa."

It has been observed that protozoan grazing on bacteria increased the abundance of bacterial strains capable of producing the plant growth hormone, indolyl acetic acid.

"Indole-3-acetic acid (IAA) is the main auxin in plants, controlling many important physiological processes including cell enlargement and division, tissue differentiation, and responses to light and gravity" - Leveau, J.H.J., Lindow SE

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