Stomatal vs. genome size in angiosperms: the somatic tail wagging the genomic dog?

被引：126

作者：

Hodgson, J. G.

Sharafi, M. ^{[1
]}

Jalili, A. ^{[2
]}

Diaz, S. ^{[3
,4
]}

Montserrat-Marti, G. ^{[5
]}

Palmer, C. ^{[6
]}

Cerabolini, B. ^{[7
]}

Pierce, S. ^{[7
]}

Hamzehee, B. ^{[2
]}

Asri, Y. ^{[2
]}

Jamzad, Z. ^{[2
]}

Wilson, P. ^{[8
]}

Raven, J. A. ^{[9
,10
]}

Band, S. R. ^{[8
]}

Basconcelo, S. ^{[11
]}

Bogard, A. ^{[6
]}

Carter, G. ^{[6
]}

Charles, M. ^{[6
]}

Castro-Diez, P. ^{[5
]}

Cornelissen, J. H. C. ^{[12
]}

Funes, G. ^{[3
,4
]}

Jones, G. ^{[6
]}

Khoshnevis, M. ^{[2
]}

Perez-Harguindeguy, N. ^{[3
,4
]}

Perez-Rontome, M. C. ^{[5
]}

Shirvany, F. A. ^{[2
]}

Vendramini, F. ^{[3
,4
]}

Yazdani, S. ^{[2
]}

Abbas-Azimi, R. ^{[2
]}

Boustani, S. ^{[2
]}

Dehghan, M. ^{[2
]}

Guerrero-Campo, J. ^{[3
,4
]}

Hynd, A. ^{[6
]}

Kowsary, E. ^{[2
]}

Kazemi-Saeed, F. ^{[2
]}

Siavash, B. ^{[2
]}

Villar-Salvador, P. ^{[5
]}

Craigie, R. ^{[6
]}

Naqinezhad, A. ^{[1
]}

Romo-Diez, A. ^{[13
]}

de Torres Espuny, L. ^{[5
]}

Simmons, E. ^{[6
]}

机构：

[1] Univ Mazandaran, Fac Sci, Dept Biol, Babol Sar, Iran

[2] Res Inst Forests & Rangelands, Tehran, Iran

[3] Univ Nacl Cordoba, CONICET, Inst Multidisciplinario Biol Vegetal, RA-5000 Cordoba, Argentina

[4] Univ Nacl Cordoba, FCEFyN, RA-5000 Cordoba, Argentina

[5] CSIC, Inst Pirenaico Ecol, Dept Ecol Func & Biodiversidad, E-50080 Zaragoza, Spain

[6] Univ Sheffield, Dept Archaeol, Sheffield S1 4ET, S Yorkshire, England

[7] Univ Insubria, Dipartimento Biol Strutturale & Funz, Unita Anal & Gest Biocenosi, I-21100 Varese, Italy

[8] Univ Sheffield, Dept Anim & Plant Sci, Unit Comparat Plant Ecol, Sheffield S10 2TN, S Yorkshire, England

[9] Scottish Crop Res Inst, Dundee DD2 5DA, Scotland

[10] Univ Dundee, Div Plant Sci, Dundee DD2 5DA, Scotland

[11] Univ Nacl Cordoba, Fac Ciencias Agropecuarias, RA-5000 Cordoba, Argentina

[12] Vrije Univ Amsterdam, Fac Earth & Life Sci, Dept Syst Ecol, NL-1081 HV Amsterdam, Netherlands

[13] Inst Bot Barcelona, Barcelona 08038, Spain

来源：

ANNALS OF BOTANY | 2010年 / 105卷 / 04期

关键词：

Stomatal size; genome size; seed size; life history; photosynthesis; allometry; ecology; evolution; SLA; leaf structure; CAM; C-4; NUCLEAR-DNA CONTENT; RELATIVE GROWTH-RATE; LINEAR SEQUENCE; SELFISH DNA; SEED SIZE; CELL-SIZE; LEAF-AREA; EVOLUTION; PLANT; PHYLOGENY;

D O I：

10.1093/aob/mcq011

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Background and Aims Genome size is a function, and the product, of cell volume. As such it is contingent on ecological circumstance. The nature of 'this ecological circumstance' is, however, hotly debated. Here, we investigate for angiosperms whether stomatal size may be this 'missing link': the primary determinant of genome size. Stomata are crucial for photosynthesis and their size affects functional efficiency. Methods Stomatal and leaf characteristics were measured for 1442 species from Argentina, Iran, Spain and the UK and, using PCA, some emergent ecological and taxonomic patterns identified. Subsequently, an assessment of the relationship between genome-size values obtained from the Plant DNA C-values database and measurements of stomatal size was carried out. Key Results Stomatal size is an ecologically important attribute. It varies with life-history (woody species, herbaceous species < vernal geophytes) and contributes to ecologically and physiologically important axes of leaf specialization. Moreover, it is positively correlated with genome size across a wide range of major taxa. Conclusions Stomatal size predicts genome size within angiosperms. Correlation is not, however, proof of causality and here our interpretation is hampered by unexpected deficiencies in the scientific literature. Firstly, there are discrepancies between our own observations and established ideas about the ecological significance of stomatal size; very large stomata, theoretically facilitating photosynthesis in deep shade, were, in this study (and in other studies), primarily associated with vernal geophytes of unshaded habitats. Secondly, the lower size limit at which stomata can function efficiently, and the ecological circumstances under which these minute stomata might occur, have not been satisfactorally resolved. Thus, our hypothesis, that the optimization of stomatal size for functional efficiency is a major ecological determinant of genome size, remains unproven.

引用

页码：573 / 584

页数：12

共 81 条

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