期刊
ENVIRONMENTAL AND EXPERIMENTAL BOTANY
卷 119, 期 -, 页码 87-95出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.envexpbot.2015.04.010
关键词
Arundineae; Isoprene; Photosynthesis; Monocotyledons; Water use Efficiency; Atmosphere; Chloroplast ultrastructure
资金
- Ministry of Education and Science (Bulgaria) [D01-168/14.07.2014]
- Autonomous Province of Trento (Italy) through MAN-VIP project
- EU FP7 project Effects of Climate Change on Air Pollution Impacts and Response Strategies for European Ecosystems (ECLAIRE) [282910]
Several plant species emit isoprene, a compound able to protect plants against high temperatures and oxidative stresses, and to affect the oxidative capacity of the atmosphere. The emission of isoprene in monocots is much less investigated than in dicots. We explored the emission of isoprene among members of the Poaceae tribe Arundineae, and its potential impact on plant performance. Our results confirm, also in monocots, the existence of a significant correlation between photosynthesis and isoprene emission and further suggest that isoprene inversely correlates to habitat xericity in unstressed Arundineae. Isoprene emission capacity developed rapidly in unfolding leaves, implying some developmental differences in the control of this biosynthetic pathway with respect to dicots. Among Arundineae, marked species-specific differences in several parameters related to plant productivity (photosynthesis, carbon lost as isoprene, water use efficiency, biomass and chloroplast ulrastructure) were observed. Isoprene presence improved structural organization of thylakoid membrane system and decreased the heat dissipation at physiological temperature. Our results demonstrate that, as in dicots, also in monocots isoprene could contribute to improve photosynthesis performance, although this was not necessarily reflected in higher yields, at least in unstressed conditions. (C) 2015 Elsevier B.V. All rights reserved.
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