Water consumption and biomass production of protoplast fusion lines of poplar hybrids under drought stress

2015 | journal article. A publication with affiliation to the University of Göttingen.

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​Water consumption and biomass production of protoplast fusion lines of poplar hybrids under drought stress​
Hennig, A.; Kleinschmit, J. R. G.; Schoneberg, S.; Löffler, S.; Janßen, A. & Polle, A. ​ (2015) 
Frontiers in Plant Science6(1) art. 330​.​ DOI: https://doi.org/10.3389/fpls.2015.00330 

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Authors
Hennig, Anne; Kleinschmit, Jörg R. G.; Schoneberg, Sebastian; Löffler, Sonja; Janßen, Alwin; Polle, Andrea 
Abstract
Woody crops such as poplars (Populus) can contribute to meet the increasing energy demand of a growing human population and can therefore enhance the security of energy supply. Using energy from biomass increases ecological sustainability as biomass is considered to play a pivotal role in abating climate change. Because areas for establishing poplar plantations are often confined to marginal sites drought tolerance is one important trait for poplar genotypes cultivated in short rotation coppice. We tested 9-month-old plants of four tetraploid Populus tremula (L.) × P. tremuloides (Michx.) lines that were generated by protoplast fusion and their diploid counterpart for water consumption and drought stress responses in a greenhouse experiment. The fusion lines showed equivalent or decreased height growth, stem biomass and total leaf area compared to the diploid line. The relative height increment of the fusion lines was not reduced compared to the diploid line when the plants were exposed to drought. The fusion lines were distinguished from the diploid counterpart by stomatal characteristics such as increased size and lower density. The changes in the stomatal apparatus did not affect the stomatal conductance. When exposed to drought the carbohydrate concentrations increased more strongly in the fusion lines than in the diploid line. Two fusion lines consumed significantly less water with regard to height growth, producing equivalent or increased relative stem biomass under drought compared to their diploid relative. Therefore, these tetraploid fusion lines are interesting candidates for short rotation biomass plantation on dry sites.
Issue Date
2015
Journal
Frontiers in Plant Science 
Organization
Fakultät für Forstwissenschaften und Waldökologie ; Büsgen-Institut ; Abteilung Forstbotanik und Baumphysiologie 
ISSN
1664-462X
eISSN
1664-462X
Language
English
Sponsor
Open Access Publikationsfonds 2015

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