Differentiation in light energy dissipation between hemiepiphytic and non-hemiepiphytic Ficus species with contrasting xylem hydraulic conductivity
Hemiepiphytic Ficus species (Hs) possess traits of more conservative water use compared with non-hemiepiphytic Ficus species (NHs) even during their terrestrial growth phase, which may result in significant differences in photosynthetic light use between these two growth forms. Stem hydraulic conduc...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_0829318X_v31_n6_p626_Hao |
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todo:paper_0829318X_v31_n6_p626_Hao2023-10-03T15:40:04Z Differentiation in light energy dissipation between hemiepiphytic and non-hemiepiphytic Ficus species with contrasting xylem hydraulic conductivity Hao, G.-Y. Wang, A.-Y. Liu, Z.-H. Franco, A.C. Goldstein, G. Cao, K.-F. chlorophyll fluorescence non-photochemical quenching photorespiration photosynthesis water use efficiency chlorophyll water carbon dioxide chlorophyll developmental stage ecophysiology election energy dissipation epiphyte gas exchange growth form growth rate hydraulic conductivity irradiance life cycle life history trait photochemistry photosynthesis respiration stem stomatal conductance water use efficiency woody plant xylem article China electron transport Ficus metabolism photosynthesis plant leaf plant stem plant stoma sunlight transport at the cellular level xylem Biological Transport China Chlorophyll Electron Transport Ficus Photosynthesis Plant Leaves Plant Stems Plant Stomata Sunlight Water Xylem Hemiepiphytic Ficus species (Hs) possess traits of more conservative water use compared with non-hemiepiphytic Ficus species (NHs) even during their terrestrial growth phase, which may result in significant differences in photosynthetic light use between these two growth forms. Stem hydraulic conductivity, leaf gas exchange and chlorophyll fluorescence were compared in adult trees of five Hs and five NHs grown in a common garden. Hs had significantly lower stem hydraulic conductivity, lower stomatal conductance and higher water use efficiency than NHs. Photorespiration played an important role in avoiding photoinhibition at high irradiance in both Hs and NHs. Under saturating irradiance levels, Hs tended to dissipate a higher proportion of excessive light energy through thermal processes than NHs, while NHs dissipated a larger proportion of electron flow than Hs through the alternative electron sinks. No significant difference in maximum net CO 2 assimilation rate was found between Hs and NHs. Stem xylem hydraulic conductivity was positively correlated with maximum electron transport rate and negatively correlated with the quantum yield of non-photochemical quenching across the 10 studied Ficus species. These findings indicate that a canopy growth habit during early life stages in Hs of Ficus resulted in substantial adaptive differences from congeneric NHs not only in water relations but also in photosynthetic light use and carbon economy. The evolution of epiphytic growth habit, even for only part of their life cycle, involved profound changes in a suite of inter-correlated ecophysiological traits that persist to a large extent even during the later terrestrial growth phase. © The Author 2011. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0829318X_v31_n6_p626_Hao |
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Universidad de Buenos Aires |
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I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
chlorophyll fluorescence non-photochemical quenching photorespiration photosynthesis water use efficiency chlorophyll water carbon dioxide chlorophyll developmental stage ecophysiology election energy dissipation epiphyte gas exchange growth form growth rate hydraulic conductivity irradiance life cycle life history trait photochemistry photosynthesis respiration stem stomatal conductance water use efficiency woody plant xylem article China electron transport Ficus metabolism photosynthesis plant leaf plant stem plant stoma sunlight transport at the cellular level xylem Biological Transport China Chlorophyll Electron Transport Ficus Photosynthesis Plant Leaves Plant Stems Plant Stomata Sunlight Water Xylem |
| spellingShingle |
chlorophyll fluorescence non-photochemical quenching photorespiration photosynthesis water use efficiency chlorophyll water carbon dioxide chlorophyll developmental stage ecophysiology election energy dissipation epiphyte gas exchange growth form growth rate hydraulic conductivity irradiance life cycle life history trait photochemistry photosynthesis respiration stem stomatal conductance water use efficiency woody plant xylem article China electron transport Ficus metabolism photosynthesis plant leaf plant stem plant stoma sunlight transport at the cellular level xylem Biological Transport China Chlorophyll Electron Transport Ficus Photosynthesis Plant Leaves Plant Stems Plant Stomata Sunlight Water Xylem Hao, G.-Y. Wang, A.-Y. Liu, Z.-H. Franco, A.C. Goldstein, G. Cao, K.-F. Differentiation in light energy dissipation between hemiepiphytic and non-hemiepiphytic Ficus species with contrasting xylem hydraulic conductivity |
| topic_facet |
chlorophyll fluorescence non-photochemical quenching photorespiration photosynthesis water use efficiency chlorophyll water carbon dioxide chlorophyll developmental stage ecophysiology election energy dissipation epiphyte gas exchange growth form growth rate hydraulic conductivity irradiance life cycle life history trait photochemistry photosynthesis respiration stem stomatal conductance water use efficiency woody plant xylem article China electron transport Ficus metabolism photosynthesis plant leaf plant stem plant stoma sunlight transport at the cellular level xylem Biological Transport China Chlorophyll Electron Transport Ficus Photosynthesis Plant Leaves Plant Stems Plant Stomata Sunlight Water Xylem |
| description |
Hemiepiphytic Ficus species (Hs) possess traits of more conservative water use compared with non-hemiepiphytic Ficus species (NHs) even during their terrestrial growth phase, which may result in significant differences in photosynthetic light use between these two growth forms. Stem hydraulic conductivity, leaf gas exchange and chlorophyll fluorescence were compared in adult trees of five Hs and five NHs grown in a common garden. Hs had significantly lower stem hydraulic conductivity, lower stomatal conductance and higher water use efficiency than NHs. Photorespiration played an important role in avoiding photoinhibition at high irradiance in both Hs and NHs. Under saturating irradiance levels, Hs tended to dissipate a higher proportion of excessive light energy through thermal processes than NHs, while NHs dissipated a larger proportion of electron flow than Hs through the alternative electron sinks. No significant difference in maximum net CO 2 assimilation rate was found between Hs and NHs. Stem xylem hydraulic conductivity was positively correlated with maximum electron transport rate and negatively correlated with the quantum yield of non-photochemical quenching across the 10 studied Ficus species. These findings indicate that a canopy growth habit during early life stages in Hs of Ficus resulted in substantial adaptive differences from congeneric NHs not only in water relations but also in photosynthetic light use and carbon economy. The evolution of epiphytic growth habit, even for only part of their life cycle, involved profound changes in a suite of inter-correlated ecophysiological traits that persist to a large extent even during the later terrestrial growth phase. © The Author 2011. |
| format |
JOUR |
| author |
Hao, G.-Y. Wang, A.-Y. Liu, Z.-H. Franco, A.C. Goldstein, G. Cao, K.-F. |
| author_facet |
Hao, G.-Y. Wang, A.-Y. Liu, Z.-H. Franco, A.C. Goldstein, G. Cao, K.-F. |
| author_sort |
Hao, G.-Y. |
| title |
Differentiation in light energy dissipation between hemiepiphytic and non-hemiepiphytic Ficus species with contrasting xylem hydraulic conductivity |
| title_short |
Differentiation in light energy dissipation between hemiepiphytic and non-hemiepiphytic Ficus species with contrasting xylem hydraulic conductivity |
| title_full |
Differentiation in light energy dissipation between hemiepiphytic and non-hemiepiphytic Ficus species with contrasting xylem hydraulic conductivity |
| title_fullStr |
Differentiation in light energy dissipation between hemiepiphytic and non-hemiepiphytic Ficus species with contrasting xylem hydraulic conductivity |
| title_full_unstemmed |
Differentiation in light energy dissipation between hemiepiphytic and non-hemiepiphytic Ficus species with contrasting xylem hydraulic conductivity |
| title_sort |
differentiation in light energy dissipation between hemiepiphytic and non-hemiepiphytic ficus species with contrasting xylem hydraulic conductivity |
| url |
http://hdl.handle.net/20.500.12110/paper_0829318X_v31_n6_p626_Hao |
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