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Juvenile and adult leaves of heteroblastic Eucalyptus globulus vary in xylem vulnerability
Citation
Lucani, CJ and Brodribb, TJ and Jordan, GJ and Mitchell, P, Juvenile and adult leaves of heteroblastic Eucalyptus globulus vary in xylem vulnerability, Trees, 33 pp. 1167-1178. ISSN 0931-1890 (2019) [Refereed Article]
Copyright Statement
© Springer-Verlag GmbH Germany, part of Springer Nature 2019
DOI: doi:10.1007/s00468-019-01851-4
Abstract
Key message
Comparing juvenile and adult shoots of Eucalyptus globulus reveals that juvenile leaves are more vulnerable to hydraulic failure than adults while stems show no significant differences.
Abstract
Understanding variation in the susceptibility for xylem tissue to cavitate and lose its function during water stress exposure is critical for predicting plant mortality during drought. An increasing number of studies examine variation in xylem vulnerability to water-stress-induced damage among species, but very few studies explore variation associated with ontogeny and development. Here, we assess stem and leaf vulnerability to cavitation in the heteroblastic tree species Eucalyptus globulus using a non-invasive optical technique to measure the accumulation of air embolisms during dehydration. No significant difference between the vulnerability of stem xylem was found between juvenile and adult stems, but the xylem of juvenile leaves was more susceptible to cavitation during dehydration than adult leaves. Analysis of vessel diameters indicates differences in maximum vessel diameter but little differences in hydraulically weighted mean vessel diameter. The results are discussed in context of similar studies that compare juvenile and adult plants, as well as potential anatomical and functional trade-offs associated with phase change and growth in E. globulus, which presents a complex relationship across its broad distribution.
Item Details
Item Type: | Refereed Article |
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Keywords: | heteroblasty, Eucalyptus globulus, ontogenetic variation, xylem vulnerability, optical method |
Research Division: | Biological Sciences |
Research Group: | Plant biology |
Research Field: | Plant physiology |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the biological sciences |
UTAS Author: | Lucani, CJ (Mr Christopher Lucani) |
UTAS Author: | Brodribb, TJ (Professor Tim Brodribb) |
UTAS Author: | Jordan, GJ (Professor Greg Jordan) |
UTAS Author: | Mitchell, P (Dr Patrick Mitchell) |
ID Code: | 148531 |
Year Published: | 2019 |
Web of Science® Times Cited: | 10 |
Deposited By: | Plant Science |
Deposited On: | 2022-01-20 |
Last Modified: | 2022-04-22 |
Downloads: | 0 |
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