Physiological, biochemical and morpho-anatomical traits thatdetermine the phenotypic plasticity of plants under droughtwere 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-growingHakonechloa macra that does not invest on isoprene biosyn-thesis. In control conditions, A. donax displayed not onlyhigher photosynthesis but also higher concentration of caroten-oids and lower phenylpropanoid content than H. macra.Indrought-stressed plants, photosynthesis was similarly inhibitedin both species, but substantially recovered only in A. donaxafter rewatering. Decline of photochemical and biochemicalparameters, increased concentration of CO2inside leaves,and impairment of chloroplast ultrastructure were onlyobserved in H. macra indicating damage of photosyntheticmachinery under drought. It is suggested that volatile andnon-volatile isoprenoids produced by A. donax efficientlypreserve the chloroplasts from transient drought damage, whileH. macra invests on phenylpropanoids that are less efficient inpreserving photosynthesis but likely offer better antioxidantprotection under prolonged stress.
Physiological significance of isoprenoids and phenylpropanoids in drought response of Arundinoideae species with contrasting habitats and metabolism / Velikova, V; Brunetti, C; Tattini, M; Doneva, D; Ahrar, M; Tsonev, T.; Stefanova, M.; Ganeva, T.; Gori, A.; Ferrini, F.; Varotto, C.; Loreto, F.. - In: PLANT, CELL AND ENVIRONMENT. - ISSN 0140-7791. - STAMPA. - 39:(2016), pp. 2185-2197. [10.1111/pce.12785]
Physiological significance of isoprenoids and phenylpropanoids in drought response of Arundinoideae species with contrasting habitats and metabolism
GORI, ANTONELLA;FERRINI, FRANCESCO;
2016
Abstract
Physiological, biochemical and morpho-anatomical traits thatdetermine the phenotypic plasticity of plants under droughtwere 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-growingHakonechloa macra that does not invest on isoprene biosyn-thesis. In control conditions, A. donax displayed not onlyhigher photosynthesis but also higher concentration of caroten-oids and lower phenylpropanoid content than H. macra.Indrought-stressed plants, photosynthesis was similarly inhibitedin both species, but substantially recovered only in A. donaxafter rewatering. Decline of photochemical and biochemicalparameters, increased concentration of CO2inside leaves,and impairment of chloroplast ultrastructure were onlyobserved in H. macra indicating damage of photosyntheticmachinery under drought. It is suggested that volatile andnon-volatile isoprenoids produced by A. donax efficientlypreserve the chloroplasts from transient drought damage, whileH. macra invests on phenylpropanoids that are less efficient inpreserving photosynthesis but likely offer better antioxidantprotection under prolonged stress.File | Dimensione | Formato | |
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