Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Przeglądasz jako GOŚĆ
Tytuł pozycji:

Cutting xylem under tension or supersaturated with gas can generate PLC and the appearance of rapid recovery from embolism.

Tytuł :
Cutting xylem under tension or supersaturated with gas can generate PLC and the appearance of rapid recovery from embolism.
Autorzy :
Wheeler JK; Department of Organismic & Evolutionary Biology, Harvard University, Cambridge, MA, 02138, USA.
Huggett BA
Tofte AN
Rockwell FE
Holbrook NM
Pokaż więcej
Źródło :
Plant, cell & environment [Plant Cell Environ] 2013 Nov; Vol. 36 (11), pp. 1938-49. Date of Electronic Publication: 2013 Jun 20.
Typ publikacji :
Journal Article; Research Support, U.S. Gov't, Non-P.H.S.
Język :
English
Imprint Name(s) :
Publication: Hoboken, NJ : John Wiley & Sons Ltd.
Original Publication: Oxford, UK : Blackwell Scientific Publications
MeSH Terms :
Gases/*metabolism
Xylem/*physiology
Acer/physiology ; Air ; Betula/physiology ; Circadian Rhythm/physiology ; Pressure ; Trees/physiology ; Water
Contributed Indexing :
Keywords: air injection; bench drying; diurnal recovery; refilling; xylem cavitation
Substance Nomenclature :
0 (Gases)
059QF0KO0R (Water)
Entry Date(s) :
Date Created: 20130525 Date Completed: 20140509 Latest Revision: 20131007
Update Code :
20210623
DOI :
10.1111/pce.12139
PMID :
23701011
Czasopismo naukowe
We investigated the common assumption that severing stems and petioles under water preserves the hydraulic continuity in the xylem conduits opened by the cut when the xylem is under tension. In red maple and white ash, higher percent loss of conductivity (PLC) in the afternoon occurred when the measurement segment was excised under water at native xylem tensions, but not when xylem tensions were relaxed prior to sample excision. Bench drying vulnerability curves in which measurement samples were excised at native versus relaxed tensions showed a dramatic effect of cutting under tension in red maple, a moderate effect in sugar maple, and no effect in paper birch. We also found that air injection of cut branches (red and sugar maple) at pressures of 0.1 and 1.0 MPa resulted in PLC greater than predicted from vulnerability curves for samples cut 2 min after depressurization, with PLC returning to expected levels for samples cut after 75 min. These results suggest that sampling methods can generate PLC patterns indicative of repair under tension by inducing a degree of embolism that is itself a function of xylem tensions or supersaturation of dissolved gases (air injection) at the moment of sample excision. Implications for assessing vulnerability to cavitation and levels of embolism under field conditions are discussed.
(© 2013 John Wiley & Sons Ltd.)
Comment in: Plant Cell Environ. 2013 Nov;36(11):1916-8. (PMID: 23763611)

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies