期刊
PLANT CELL AND ENVIRONMENT
卷 39, 期 10, 页码 2185-2197出版社
WILEY
DOI: 10.1111/pce.12785
关键词
Arundo donax; Hakonechloa macra; abscisic acid; chloroplast ultrastructure; isoprene; leaf anatomy; xanthophylls
资金
- Autonomous Province of Trento (Italy) through the MAN-VIP project [2902]
- Ecogenomics group
- EU FP7 project 'Effects of Climate Change on Air Pollution Impacts and Response Strategies for European Ecosystems' (ECLAIRE) [282910]
- Ministry of Education and Science (Bulgaria) [D01-168/14.07.2014]
Physiological, biochemical and morpho-anatomical traits that determine the phenotypic plasticity of plants under drought were tested in two Arundinoideae with contrasting habitats, growth traits and metabolism: the fast-growing Arundo donax, which also is a strong isoprene emitter, and the slow-growing Hakonechloa macra that does not invest on isoprene biosynthesis. In control conditions, A. donax displayed not only higher photosynthesis but also higher concentration of carotenoids and lower phenylpropanoid content than H. macra. In drought-stressed plants, photosynthesis was similarly inhibited in both species, but substantially recovered only in A. donax after rewatering. Decline of photochemical and biochemical parameters, increased concentration of CO2 inside leaves, and impairment of chloroplast ultrastructure were only observed in H. macra indicating damage of photosynthetic machinery under drought. It is suggested that volatile and non-volatile isoprenoids produced by A. donax efficiently preserve the chloroplasts fromtransient drought damage, while H. macra invests on phenylpropanoids that are less efficient in preserving photosynthesis but likely offer better antioxidant protection under prolonged stress.
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