the earliest-formed elements of the primary phloem, the cells of which reach maturation before the elongation of the surrounding tissue
protophloem in American English
(ˌproutəˈflouem)
noun
Botany
the part of the primary phloem that develops first, consisting of narrow, thin-walled cells
Word origin
[1880–85; proto- + phloem]This word is first recorded in the period 1880–85. Other words that entered Englishat around the same time include: automatism, barnstorm, highball, impressionism, jackpotproto- is a combining form meaning “first,” “foremost,” “earliest form of,” used in theformation of compound words (protomartyr; protolithic; protoplasm), specialized in chemical terminology to denote the first of a series of compounds,or the one containing the minimum amount of an element
Examples of 'protophloem' in a sentence
protophloem
A new finding in terms of its association with protophloem was observed.
Garima Srivastava, Arvind M. Kayastha 2014, 'Β-Amylase from Starchless Seeds of Trigonella Foenum-Graecum and Its Localizationin Germinating Seeds', PLoS ONE10.1371/journal.pone.0088697. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Successive cambia are initiated from the pericyclic parenchyma situated three to four cell layers outside of the protophloem.
Rajput Kishore S. 2016, 'Development of successive cambia and wood structure in stem of Rivea hypocriteriformis(Convolvulaceae)', Polish Botanical Journalhttp://www.degruyter.com/view/j/pbj.2016.61.issue-1/pbj-2016-0003/pbj-2016-0003.xml?format=INT. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)