protophloem


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protophloem

[¦prōd·ə′flō·əm]
(botany)
The initial primary phloem developed from the procambium.
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"Very early-stage phloem tissues (protophloem) are helping to guide the behaviour of cells and establish patterns of developmental potential that impact on future radial growth," says Professor Helariutta.
protophloem: first phloem to differentiate in a plant or part of it.