Extending the generality of leaf economic design principles in the cycads, an ancient lineage

Summary: Cycads are the most ancient lineage of living seed plants, but the design of their leaves has received little study. We tested whether cycad leaves are governed by the same fundamental design principles previously established for ferns, conifers and angiosperms, and characterized the unique...

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Autores principales:	Zhang, Y.-J., Cao, K.-F., Sack, L., Li, N., Wei, X.-M., Goldstein, G.
Formato:	JOUR
Materias:	Cycas Cycadales Functional convergence Gymnosperms Leaf economic spectrum Leaf hydraulic conductance Photosynthetic capacity Trade-off concentration (composition) hydraulic conductivity leaf morphology nutrient dynamics photosynthesis physiology vascular plant Coniferophyta Cycadopsida Filicophyta Gymnospermae Magnoliophyta Spermatophyta chlorophyll nitrogen phosphorus anatomy and histology angiosperm comparative study Cycadophyta evapotranspiration gymnosperm light metabolism phenotype plant leaf Angiosperms Chlorophyll Light Nitrogen Phenotype Phosphorus Photosynthesis Plant Leaves Plant Transpiration
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_0028646X_v206_n2_p817_Zhang
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_0028646X_v206_n2_p817_Zhang
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spelling	todo:paper_0028646X_v206_n2_p817_Zhang2023-10-03T14:39:09Z Extending the generality of leaf economic design principles in the cycads, an ancient lineage Zhang, Y.-J. Cao, K.-F. Sack, L. Li, N. Wei, X.-M. Goldstein, G. Cycas Cycadales Functional convergence Gymnosperms Leaf economic spectrum Leaf hydraulic conductance Photosynthetic capacity Trade-off concentration (composition) hydraulic conductivity leaf morphology nutrient dynamics photosynthesis physiology vascular plant Coniferophyta Cycadales Cycadopsida Cycas Filicophyta Gymnospermae Magnoliophyta Spermatophyta chlorophyll nitrogen phosphorus anatomy and histology angiosperm comparative study Cycadophyta Cycas evapotranspiration gymnosperm light metabolism phenotype photosynthesis physiology plant leaf Angiosperms Chlorophyll Cycadophyta Cycas Gymnosperms Light Nitrogen Phenotype Phosphorus Photosynthesis Plant Leaves Plant Transpiration Summary: Cycads are the most ancient lineage of living seed plants, but the design of their leaves has received little study. We tested whether cycad leaves are governed by the same fundamental design principles previously established for ferns, conifers and angiosperms, and characterized the uniqueness of this relict lineage in foliar trait relationships. Leaf structure, photosynthesis, hydraulics and nutrient composition were studied in 33 cycad species from nine genera and three families growing in two botanical gardens. Cycads varied greatly in leaf structure and physiology. Similarly to other lineages, light-saturated photosynthetic rate per mass (Am) was related negatively to leaf mass per area and positively to foliar concentrations of chlorophyll, nitrogen (N), phosphorus and iron, but unlike angiosperms, leaf photosynthetic rate was not associated with leaf hydraulic conductance. Cycads had lower photosynthetic N use efficiency and higher photosynthetic performance relative to hydraulic capacity compared with other lineages. These findings extend the relationships shown for foliar traits in angiosperms to the cycads. This functional convergence supports the modern synthetic understanding of leaf design, with common constraints operating across lineages, even as they highlight exceptional aspects of the biology of this key relict lineage. © 2015 New Phytologist Trust. Fil:Goldstein, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0028646X_v206_n2_p817_Zhang
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cycas Cycadales Functional convergence Gymnosperms Leaf economic spectrum Leaf hydraulic conductance Photosynthetic capacity Trade-off concentration (composition) hydraulic conductivity leaf morphology nutrient dynamics photosynthesis physiology vascular plant Coniferophyta Cycadales Cycadopsida Cycas Filicophyta Gymnospermae Magnoliophyta Spermatophyta chlorophyll nitrogen phosphorus anatomy and histology angiosperm comparative study Cycadophyta Cycas evapotranspiration gymnosperm light metabolism phenotype photosynthesis physiology plant leaf Angiosperms Chlorophyll Cycadophyta Cycas Gymnosperms Light Nitrogen Phenotype Phosphorus Photosynthesis Plant Leaves Plant Transpiration
spellingShingle	Cycas Cycadales Functional convergence Gymnosperms Leaf economic spectrum Leaf hydraulic conductance Photosynthetic capacity Trade-off concentration (composition) hydraulic conductivity leaf morphology nutrient dynamics photosynthesis physiology vascular plant Coniferophyta Cycadales Cycadopsida Cycas Filicophyta Gymnospermae Magnoliophyta Spermatophyta chlorophyll nitrogen phosphorus anatomy and histology angiosperm comparative study Cycadophyta Cycas evapotranspiration gymnosperm light metabolism phenotype photosynthesis physiology plant leaf Angiosperms Chlorophyll Cycadophyta Cycas Gymnosperms Light Nitrogen Phenotype Phosphorus Photosynthesis Plant Leaves Plant Transpiration Zhang, Y.-J. Cao, K.-F. Sack, L. Li, N. Wei, X.-M. Goldstein, G. Extending the generality of leaf economic design principles in the cycads, an ancient lineage
topic_facet	Cycas Cycadales Functional convergence Gymnosperms Leaf economic spectrum Leaf hydraulic conductance Photosynthetic capacity Trade-off concentration (composition) hydraulic conductivity leaf morphology nutrient dynamics photosynthesis physiology vascular plant Coniferophyta Cycadales Cycadopsida Cycas Filicophyta Gymnospermae Magnoliophyta Spermatophyta chlorophyll nitrogen phosphorus anatomy and histology angiosperm comparative study Cycadophyta Cycas evapotranspiration gymnosperm light metabolism phenotype photosynthesis physiology plant leaf Angiosperms Chlorophyll Cycadophyta Cycas Gymnosperms Light Nitrogen Phenotype Phosphorus Photosynthesis Plant Leaves Plant Transpiration
description	Summary: Cycads are the most ancient lineage of living seed plants, but the design of their leaves has received little study. We tested whether cycad leaves are governed by the same fundamental design principles previously established for ferns, conifers and angiosperms, and characterized the uniqueness of this relict lineage in foliar trait relationships. Leaf structure, photosynthesis, hydraulics and nutrient composition were studied in 33 cycad species from nine genera and three families growing in two botanical gardens. Cycads varied greatly in leaf structure and physiology. Similarly to other lineages, light-saturated photosynthetic rate per mass (Am) was related negatively to leaf mass per area and positively to foliar concentrations of chlorophyll, nitrogen (N), phosphorus and iron, but unlike angiosperms, leaf photosynthetic rate was not associated with leaf hydraulic conductance. Cycads had lower photosynthetic N use efficiency and higher photosynthetic performance relative to hydraulic capacity compared with other lineages. These findings extend the relationships shown for foliar traits in angiosperms to the cycads. This functional convergence supports the modern synthetic understanding of leaf design, with common constraints operating across lineages, even as they highlight exceptional aspects of the biology of this key relict lineage. © 2015 New Phytologist Trust.
format	JOUR
author	Zhang, Y.-J. Cao, K.-F. Sack, L. Li, N. Wei, X.-M. Goldstein, G.
author_facet	Zhang, Y.-J. Cao, K.-F. Sack, L. Li, N. Wei, X.-M. Goldstein, G.
author_sort	Zhang, Y.-J.
title	Extending the generality of leaf economic design principles in the cycads, an ancient lineage
title_short	Extending the generality of leaf economic design principles in the cycads, an ancient lineage
title_full	Extending the generality of leaf economic design principles in the cycads, an ancient lineage
title_fullStr	Extending the generality of leaf economic design principles in the cycads, an ancient lineage
title_full_unstemmed	Extending the generality of leaf economic design principles in the cycads, an ancient lineage
title_sort	extending the generality of leaf economic design principles in the cycads, an ancient lineage
url	http://hdl.handle.net/20.500.12110/paper_0028646X_v206_n2_p817_Zhang
work_keys_str_mv	AT zhangyj extendingthegeneralityofleafeconomicdesignprinciplesinthecycadsanancientlineage AT caokf extendingthegeneralityofleafeconomicdesignprinciplesinthecycadsanancientlineage AT sackl extendingthegeneralityofleafeconomicdesignprinciplesinthecycadsanancientlineage AT lin extendingthegeneralityofleafeconomicdesignprinciplesinthecycadsanancientlineage AT weixm extendingthegeneralityofleafeconomicdesignprinciplesinthecycadsanancientlineage AT goldsteing extendingthegeneralityofleafeconomicdesignprinciplesinthecycadsanancientlineage
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Extending the generality of leaf economic design principles in the cycads, an ancient lineage

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