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Experimental study of the types of cavitation by air seeding using light microscopy.
- Source :
- Tree Physiology; Dec2015, Vol. 35 Issue 12, p1325-1332, 8p
- Publication Year :
- 2015
-
Abstract
- Recently, three types of cavitation: (i) expanding gradually; (ii) expanding-exploding, becoming a long-shaped bubble-lengthening by degrees; (iii) suddenly exploding and fully filling the conduit instantly, were proposed. Directed by this theory, experiments were performed using light microscopy to study the natural drying processes of xylem sections of Platycladus orientalis (L.) Franco. Three different phenomena of gas filling process in conduits were captured by replaying recorded videos. The first phenomenon is that a bubble emerging in a conduit expands and elongates gradually to fill the conduit. The second phenomenon is that a bubble emerging in a conduit expands gradually, and then suddenly becomes long-shaped, and extends continuously. The third phenomenon is that a bubble instantly fully fills a conduit. This paper suggests in these experiments that after losing the bulk water of a section, as the water stress of that section became more severe, the water pressures of different conduits of the section were not necessarily the same, and as time went on, the water pressures decreased constantly. Considering some practical factors, the three phenomena captured in our experiment are explained by our theory. [ABSTRACT FROM AUTHOR]
- Subjects :
- CAVITATION (Botany)
MICROSCOPY
XYLEM
WATER pressure
GAS exchange in plants
Subjects
Details
- Language :
- English
- ISSN :
- 0829318X
- Volume :
- 35
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Tree Physiology
- Publication Type :
- Academic Journal
- Accession number :
- 111916985
- Full Text :
- https://doi.org/10.1093/treephys/tpv060