Plants That Are Efficient at Taking Iron Up from a Calcareous

Multiple Choice

Plants that are efficient at taking iron up from a calcareous soil are known to employ which of the following methods?

A) lower pH of their rhizosphere
B) produce reducing agents that reduce Fe³⁺ to Fe²⁺ in the rhizosphere.
C) produce organic compounds that can form stable chelates with iron.
D) all of the above
E) none of the above