Lenticel

Lenticel

bark are the lenticels. [ [http://dictionary.reference.com/browse/lenticel "Lenticel"] . "The American Heritage Science Dictionary", Houghton Mifflin Company, via dictionary.com. Retrieved on 2007-10-11] ] A lenticel is a spongy area present in the cork surfaces of the stems, roots, and other parts of vascular plants. It appears on the surface as a lenticular (lens-shaped) spot, which acts as a pore. These structures allow for the exchange of gases between the internal tissues and atmosphere to occur across the periderm, which would otherwise prevent this exchange of gases. The name lenticel, pronounced with a soft "c", derives from its lenticular shape. The shape of lenticels is one of the characteristics used for tree identification.

Formation

Lenticel formation begins during the development of the first periderm. In the stem, they usually appear below a stoma or group of stomata. Lenticels are found as raised circular, oval, or elongated areas on stems and roots. As stems and roots mature lenticel development continues in the newly forming periderm found at the bottom of cracks in the bark.Clearhello

Fruits

Lenticels are also present on many fruits, quite noticeably on many apples and pears. On European pears, they can serve as an indicator of when to pick the fruit, as light lenticels on immature fruit darken and become brown. [Pyzner, John. (2005-04-19.) [http://www.lsuagcenter.com/news_archive/2004/News+You+Can+Use/Pick+Pears+Before+Completely+Ripe+Advises+LSU+AgCenter+Horticulturist.htm "Pick pears before completely ripe, advises LSU AgCenter horticulturist"] . Louisiana State University Agricultural Center website. Retrieved on 2007-10-11.] Certain bacterial and fungal infections can penetrate fruits through their lenticels, with susceptibility sometimes increasing with its age. [Irtwange, S. V. (February, 2006.) [http://cigr-ejournal.tamu.edu/submissions/volume8/Invited%20overview%20Irtwange(2)%2027Feb2006.pdf "Application of modified atmosphere packaging and related technology in postharvest handling of fresh fruits and vegetables"] . Agricultural Engineering International: the CIGR Ejournal. Invited Overview No. 4. Vol. VIII, page 8. Retrieved on 2007-10-11.]

Notes

References

*cite book | last =Raven | first =Peter H. | coauthors =Ray F. Evert, Susan E. Eichorn | title =Biology of Plants 7th Ed. | publisher =W.H. Freeman and Company Publishers | date =2005 | pages =586-587 | id =ISBN 0-7167-1007-2


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Look at other dictionaries:

  • Lenticel — Len ti*cel (l[e^]n t[i^]*s[e^]l), n. [F. lenticelle, dim. fr. L. lens, lentis, a lentil. Cf. {Lentil}.] (Bot.) (a) One of the small, oval, rounded spots upon the stem or branch of a plant, from which the underlying tissues may protrude or roots… …   The Collaborative International Dictionary of English

  • lenticel — [len′ti sel΄] n. [ModL lenticella, dim. < L lens (gen. lentis), lentil] a spongy area in the bark of a woody plant, serving as a pore to permit the exchange of gases between the stem and the atmosphere lenticellate [len΄tisel′it] adj …   English World dictionary

  • lenticel — noun Etymology: New Latin lenticella, diminutive of Latin lent , lens lentil Date: circa 1864 a loose aggregation of cells which penetrates the surface (as of a stem) of a woody plant and through which gases are exchanged between the atmosphere… …   New Collegiate Dictionary

  • lenticel — lenticellate /len teuh sel it/, adj. /len teuh sel /, n. Bot. a body of cells formed on the periderm of a stem, appearing on the surface of the plant as a lens shaped spot, and serving as a pore. [1850 55; < NL lenticella, dim. of L lenticula… …   Universalium

  • lenticel — noun a) One of the small, oval, rounded spots upon the stem or branch of a plant, from which the underlying tissues may protrude or roots may issue, either in the air, or more commonly when the stem or branch is covered with water or earth. b) A… …   Wiktionary

  • lenticel — len·ti·cel (lenґtĭ sel) a lens shaped gland, especially one of those at the base of the tongue …   Medical dictionary

  • lenticel·la — len|ti|cel|·la Mot Pla Nom femení …   Diccionari Català-Català

  • lenticel — [ lɛntɪsɛl] noun Botany one of many raised pores in the stem of a woody plant allowing gas exchange between the atmosphere and the internal tissues. Origin C19: from mod. L. lenticella, dimin. of L. lens, lent lentil …   English new terms dictionary

  • lenticel —   Gas exchange tissue in cycad coralloid roots …   Expanded glossary of Cycad terms

  • lenticel — len·ti·cel …   English syllables

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