phloem

noun
phlo·​em | \ ˈflō-ˌem How to pronounce phloem (audio) \

Definition of phloem

: a complex tissue in the vascular system of higher plants that consists mainly of sieve tubes and elongated parenchyma cells usually with fibers and that functions in translocation and in support and storage — compare xylem

Examples of phloem in a Sentence

Recent Examples on the Web Just inside the bark is a cylinder of tissue known as the phloem. Neil Sperry, ExpressNews.com, "Neil Sperry: Cure for lanky hibiscus is a big trim, a new pot and some fertilizer," 16 Apr. 2020 When the phloem is lost all the way around by injury like this (or by weed trimmer damage at ground line), the roots will die and the tree will die. Neil Sperry, ExpressNews.com, "Neil Sperry: Cure for lanky hibiscus is a big trim, a new pot and some fertilizer," 16 Apr. 2020 If the tree is still creating foliage, then water and nutrients are being transported from the roots to the tree canopy, so the phloem and xylem are still functional. oregonlive, "Will this wounded weeping willow survive? Ask an expert," 9 Feb. 2020 Christopher Vincent, a physiologist at the University of Florida who studies citrus greening, said the waxy coating on the leaves of orange trees has been an impediment to delivering oxytetracycline into the plant’s phloem, or vascular system. Andrew Jacobs, New York Times, "Spraying Antibiotics to Fight Citrus Scourge Doesn’t Help, Study Finds," 16 Aug. 2019 The part of the circulatory system (called the vascular system in plants) that carries the food (basically sugar water) is located just below the bark and is called the phloem. Dan Gill, NOLA.com, "How to care for a damaged tree trunk," 18 May 2019 The beetles, just a quarter-inch long, can each lay up to 150 eggs in the phloem layer beneath a tree's bark on top of the wood. Zaz Hollander, Anchorage Daily News, "Voracious spruce bark beetles are back in force in Southcentral Alaska," 10 June 2018 The beetles chewed and fed on the tree’s phloem, conduits just below the bark for the tree’s life-giving juices. Lynda V. Mapes, The Seattle Times, "Farewell, giant pine: Climate change kills a champion at Washington Park Arboretum," 13 May 2017 Cane bark (phloem) and wood (xylem) damage can occur in grapevines at temperatures from minus 4 to minus 13. Eric Degerman, idahostatesman, "Harsh winter takes heavy toll on Treasure Valley vines," 14 Apr. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'phloem.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of phloem

1872, in the meaning defined above

History and Etymology for phloem

German, from Greek phloios, phloos bark; perhaps akin to Greek phlein to teem, abound, phlyein, phlyzein to boil over — more at fluid

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Time Traveler for phloem

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The first known use of phloem was in 1872

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Last Updated

13 May 2020

Cite this Entry

“Phloem.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phloem. Accessed 2 Jul. 2020.

More from Merriam-Webster on phloem

Rhyming Dictionary: Words that rhyme with phloem

Britannica.com: Encyclopedia article about phloem

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