Recovery performance in xylem hydraulic conductivity is correlated with cavitation resistance for temperate deciduous tree species

Mayumi Ogasa, Naoko Miki, Yuki Murakami, Ken Yoshikawa

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

Woody species hydraulically vulnerable to xylem cavitation may experience daily xylem embolism. How such species cope with the possibility of accumulated embolism is unclear. In this study, we examined seven temperate woody species to assess the hypothesis that low cavitation resistance (high vulnerability to cavitation) is compensated by high recovery performance via vessel refilling. We also evaluated leaf functional and xylem structural traits. The xylem recovery index (XRI), defined as the ratio of xylem hydraulic conductivity in plants rewatered after soil drought to that in plants under moist conditions, varied among species. The xylem water potential causing 50% loss of hydraulic conductivity (Ψ50) varied among the species studied, whereas only a slight difference was detected with respect to midday xylem water potential (Ψmin), indicating smaller hydraulic safety margins (Ψmin50) for species more vulnerable to cavitation. Cavitation resistance (|Ψ50|) was negatively correlated with XRI across species, with cavitation-vulnerable species showing a higher performance in xylem recovery. Wood density was positively correlated with cavitation resistance and was negatively correlated with XRI. These novel results reveal that coordination exists between cavitation resistance and xylem recovery performance, in association with wood functional traits such as denser wood for cavitation-resistant xylem and less-dense but water-storable wood for refillable xylem. These findings provide insights into long-term maintenance of water transport in tree species growing under variable environmental conditions.

Original languageEnglish
Pages (from-to)335-344
Number of pages10
JournalTree Physiology
Volume33
Issue number4
DOIs
Publication statusPublished - Apr 2013

Fingerprint

Xylem
hydraulic conductivity
xylem
xylem water potential
embolism
Water
Embolism
margin of safety
wood density
xylem vessels
Droughts
fluid mechanics
water
drought

Keywords

  • gas exchange
  • vessel refilling
  • water stress
  • water transport
  • xylem embolism
  • xylem structure

ASJC Scopus subject areas

  • Plant Science
  • Physiology

Cite this

Recovery performance in xylem hydraulic conductivity is correlated with cavitation resistance for temperate deciduous tree species. / Ogasa, Mayumi; Miki, Naoko; Murakami, Yuki; Yoshikawa, Ken.

In: Tree Physiology, Vol. 33, No. 4, 04.2013, p. 335-344.

Research output: Contribution to journalArticle

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