| Abstract Detail
Wood: Biology of a Living Tissue Jacobsen, Anna L [1]. Xylem vessel development in the secondary xylem of woody plants. Within the secondary xylem of woody plants, vessel elements undergo a series of developmental steps, including the differentiation of vessel elements from fusiform initials, the expansion of the cells, the formation of the secondary cell wall, and the eventual opening of the end walls and lysing of cellular contents. The timing of vessel element development may be quite prolonged and varies between species. Secondary xylem vessel elements within the stems of Vitis vinifera mature over several weeks and stems maintain a large proportion of living vessel elements throughout most of the growing season. Similarly, vessel elements may take as long as 10 weeks to mature in Quercus and is also a several week process in Populus. Because of the long period of development and maturation of vessels, xylem may be able to dynamically respond throughout the season as growing conditions change through the development of structurally different vessels (most apparent in the extreme differences potentially present between early- and late-wood) or through a change in the suite of vessels that are hydraulically active. Vessel hydraulic activity may be altered both through the maturation of new vessels or through the embolism or occlusion of previously functional vessels. Although vessels are “dead” when hydraulically functional, they represent a component of the xylem that undergoes dynamic changes in hydraulic function seasonally and in response to changing conditions and hydraulic requirements.
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1 - California State University Bakersfield, 9001 Stockdale Hwy, 61 SCI, Bakersfield, CA, 93311, USA
Keywords:
xylem
vessel
Development
anatomy
hydraulics.
Presentation Type: Symposium Presentation
Session: SY09, Wood: Biology of a Living Tissue
Location: Oglethrope Auditorium/Savannah International Trade and Convention Center
Date: Wednesday, August 3rd, 2016
Time: 10:15 AM
Number: SY09006
Abstract ID:480
Candidate for Awards:None |
