Ryan, Annette C and Hewitt, C Nicholas and Possell, Malcolm and Vickers, Claudia E and Purnell, Anna and Mullineaux, Philip M and Davies, William J and Dodd, Ian C (2014) Isoprene emission protects photosynthesis but reduces plant productivity during drought in transgenic tobacco (<i>Nicotiana tabacum</i>) plants. New Phytologist, 201 (1). pp. 205-216. DOI https://doi.org/10.1111/nph.12477
Ryan, Annette C and Hewitt, C Nicholas and Possell, Malcolm and Vickers, Claudia E and Purnell, Anna and Mullineaux, Philip M and Davies, William J and Dodd, Ian C (2014) Isoprene emission protects photosynthesis but reduces plant productivity during drought in transgenic tobacco (<i>Nicotiana tabacum</i>) plants. New Phytologist, 201 (1). pp. 205-216. DOI https://doi.org/10.1111/nph.12477
Ryan, Annette C and Hewitt, C Nicholas and Possell, Malcolm and Vickers, Claudia E and Purnell, Anna and Mullineaux, Philip M and Davies, William J and Dodd, Ian C (2014) Isoprene emission protects photosynthesis but reduces plant productivity during drought in transgenic tobacco (<i>Nicotiana tabacum</i>) plants. New Phytologist, 201 (1). pp. 205-216. DOI https://doi.org/10.1111/nph.12477
Abstract
<jats:title>Summary</jats:title><jats:p> <jats:list list-type="bullet"> <jats:list-item><jats:p>Isoprene protects the photosynthetic apparatus of isoprene‐emitting plants from oxidative stress. The role of isoprene in the response of plants to drought is less clear.</jats:p></jats:list-item> <jats:list-item><jats:p>Water was withheld from transgenic isoprene‐emitting and non‐emitting tobacco (<jats:italic>Nicotiana tabacum</jats:italic>) plants, to examine: the response of isoprene emission to plant water deficit; a possible relationship between concentrations of the drought‐induced phytohormone abscisic acid (<jats:styled-content style="fixed-case">ABA</jats:styled-content>) and isoprene; and whether isoprene affected foliar reactive oxygen species (<jats:styled-content style="fixed-case">ROS</jats:styled-content>) and lipid peroxidation levels.</jats:p></jats:list-item> <jats:list-item><jats:p>Isoprene emission did not affect whole‐plant water use, foliar <jats:styled-content style="fixed-case">ABA</jats:styled-content> concentration or leaf water potential under water deficit. Compared with well‐watered controls, droughted non‐emitting plants significantly increased <jats:styled-content style="fixed-case">ROS</jats:styled-content> content (31–46%) and lipid peroxidation (30–47%), concomitant with decreased operating and maximum efficiencies of photosystem <jats:styled-content style="fixed-case">II</jats:styled-content> photochemistry and lower leaf and whole‐plant water use efficiency (<jats:styled-content style="fixed-case">WUE</jats:styled-content>). Droughted isoprene‐emitting plants showed no increase in <jats:styled-content style="fixed-case">ROS</jats:styled-content> content or lipid peroxidation relative to well‐watered controls, despite isoprene emission decreasing before leaf wilting.</jats:p></jats:list-item> <jats:list-item><jats:p>Although isoprene emission protected the photosynthetic apparatus and enhanced leaf and whole‐plant <jats:styled-content style="fixed-case">WUE</jats:styled-content>, non‐emitting plants had 8–24% more biomass under drought, implying that isoprene emission incurred a yield penalty.</jats:p></jats:list-item> </jats:list> </jats:p>
Item Type: | Article |
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Uncontrolled Keywords: | abscisic acid (ABA); drought; hydrogen peroxide; isoprene; lipid peroxidation; Nicotiana tabacum (tobacco); oxidative stress; water use efficiency |
Subjects: | Q Science > QK Botany Q Science > QP Physiology S Agriculture > SB Plant culture |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Life Sciences, School of |
SWORD Depositor: | Unnamed user with email elements@essex.ac.uk |
Depositing User: | Unnamed user with email elements@essex.ac.uk |
Date Deposited: | 08 Nov 2013 14:52 |
Last Modified: | 30 Oct 2024 19:51 |
URI: | http://repository.essex.ac.uk/id/eprint/8213 |
Available files
Filename: Ryan et al New Phytol isoprene.pdf