Journal Title
Title of Journal: Ann Bot
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Abbravation: Annals of Botany
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Authors: Schmidt AnnaMary Ormrod Douglas P Livingston Nigel J Misra Santosh
Publish Date: 2000/04/01
Volume: 85, Issue: 4, Pages: 571-575
Abstract
AnnaMary Schmidt Douglas P Ormrod Nigel J Livingston Santosh Misra The Interaction of UltravioletB Radiation and Water Deficit in Two Arabidopsis thaliana Genotypes Annals of Botany Volume 85 Issue 4 April 2000 Pages 571–575 https//doiorg/101006/anbo19991085It has been demonstrated in both herbaceous and woody species that tissue hydration resulting from exposure to drought is less pronounced if plants are concurrently exposed to ultravioletB radiation UVB An explanation for the mechanisms underlying this phenomenon has been elusive Arabidopsis thaliana L Heynh genotypes defective in specific defences against UVB exposure may permit more insightful study of droughtUVB interactions than is possible with genetically uniform plants Arabidopsis has a rosette stature and has predominantly abaxial stomata Thus it is difficult to investigate its stomatal behaviour and gas exchange using conventional techniques and instrumentation In this study the relative abundance of 13 C and 12 C in leaf tissue δ 13 C was used as a means of determining water use efficiency WUE and the relative balance at the site of carbon fixation between CO 2 supply and demand UVB insensitive L er and sensitive fah1 Arabidopsis genotypes were raised in a growth chamber and exposed to 6 kJ m −2 d −1 UVB irradiation and subjected to drought In both genotypes leaf desiccation was less pronounced than that of control plants that were subjected to drought but not exposed to UVB The relatively low more negative leaf δ 13 C values indicating low WUE but high dry matter production of the UVB exposed plants suggest that their higher leaf water content was not primarily due to stomatal closure We propose that the mechanisms underlying the maintenance of higher leaf water content involved UVB and water stress induced biosynthesis of stress proteins and compatible osmolytes Copyright 2000 Annals of Botany Company
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- Cross-validation of Non-linear Growth Functions for Modelling Tree Height–Diameter Relationships
- Effects of Light and CO2 on Net Photosynthesis Rates of Stands of Aubergine and Amaranthus
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- Ultrastructural Responses of the Lichen Bryoria fuscescens to Simulated Acid Rain and Heavy Metal Deposition
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- The Structure and Fungal Associates of Mycorrhizas in Leucopogon parviflorus (Andr.) Lindl.
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- Latitudinal Differences in Coconut Foliar Spiral Direction: A Re-evaluation and Hypothesis
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