PyankovKondratchukShipley1999

Référence

Pyankov, V.I., Kondratchuk, A.V. and Shipley, B. (1999) Leaf structure and specific leaf mass: The alpine desert plants of the Eastern Pamirs, Tadjikistan. New Phytologist, 143(1):131-142.

Résumé

This study examines interrelationships between eight leaf attributes (specific leaf mass, area, dry mass, lamina thickness, mesophyll cell number per cm2, mesophyll cell volume, chloroplast volume, and number of chloroplasts per mesophyll cell) in field-grown plants of 94 species from the Eastern Pamir Mountains, at elevations between 3800 and 4750 m. Unlike most other mountain areas, the Eastern Pamirs, Karakorum system, Tadjikistan provide localities where low temperatures and radiation combine with moisture stress at high altitudes. For all the attributes measured, significant differences were found between plants with different mesophyll types. Leaves with dorsiventral palisade structure (dorsal palisade, ventral spongy mesophyll cells) had thicker leaves with larger but fewer mesophyll cells, containing more and larger chloroplasts. These differences in mesophyll type are reflected in differences in the total surface of mesophyll cells per unit leaf area (A(mes)/A) or volume (A(mes)/V). Plants with isopalisade leaf structure (palisade cells under both dorsal and ventral surfaces) are more commonly xerophytes and their increased values of A(mes)/A and A(mes)/V decrease CO2 mesophyll resistance, which is an important adaptation to drought. Path analysis shows the critical importance of mesophyll cell volume in leading to the covariance between the different leaf attributes and hence to specific leaf mass (SLM), even though mesophyll cell volume is not itself strongly correlated with SLM. This is because mesophyll cell volume increases SLM through its effects on leaf thickness and chloroplast number per cell, but decreases SLM through its negative effect on mesophyll cell density.

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@ARTICLE { PyankovKondratchukShipley1999,
    AUTHOR = { Pyankov, V.I. and Kondratchuk, A.V. and Shipley, B. },
    TITLE = { Leaf structure and specific leaf mass: The alpine desert plants of the Eastern Pamirs, Tadjikistan },
    JOURNAL = { New Phytologist },
    YEAR = { 1999 },
    VOLUME = { 143 },
    PAGES = { 131-142 },
    NUMBER = { 1 },
    NOTE = { 0028646X (ISSN) Cited By (since 1996): 22 Export Date: 26 April 2007 Source: Scopus CODEN: NEPHA doi: 10.1046/j.1469-8137.1999.00435.x Language of Original Document: English Correspondence Address: Shipley, B.; Department of Biology; University of Sherbrooke Sherbrooke, Que. J1K 2R1, Canada; email: bshipley@courrier.usherb.ca References: Araus, J., Alegre, L., Tapia, L., Calafel, R., Serret, M., Relationships between photosynthetic capacity and leaf structure in several shade plants (1986) American Journal of Botany, 73, pp. 1760-1770; Barinov, M.G., (1988) Mesostructure of Photosynthetic Apparatus of Plants from Different Climatic Zones, , Syvktyvkar: Komi Sientific Center of Urlas Branch Academy of Sciences of the USSR; Bentler, P.M., (1995) EQS Structural Equations Program Manual, , Encino, CA, USA: Multivariate Software, Inc; Bollen, K.A., (1989) Structural Equations with Latent Variables, , New York, USA: Wiley; Choong, M.F., Lucas, P.W., Ong, J.S.Y., Pereira, B., Tan, H.T.W., Turner, I.M., Leaf fracture toughness and sclerophylly: Their correlations and ecological implications (1992) New Phytologist, 121, pp. 597-610; Czerepanov, S.K., (1995) Vascular Plants of Russia and Adjacent States (The Former USSR), , Cambridge, UK: Cambridge University Press; Ellsworth, D.S., Reich, P.B., Leaf mass per area, nitrogen content and photosynthetic carbon gain in Acer saccharum seedlings in contrasting forest light environments (1992) Functional Ecology, 6, pp. 423-435; Evans, J., Von Caemmerer, S., Carbon dioxide diffusion inside leaves (1996) Plant Physiology, 110, pp. 339-346; Evans, J., Von Caemmerer, S., Setchell, B.A., Hudson, G.S., The relationships between CO2 transfer conductance and leaf anatomy in transgenic tobacco leaves (1994) Australian Journal of Plant Physiology, 21, pp. 475-495; Field, C., Mooney, H.A., The photosynthesis-nitrogen relationship in wild plants (1986) On the Economy of Plant Form and Function, pp. 25-55. , Givnish J, ed. 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Consequences for photosynthesis (1979) Plant Physiology, 63, pp. 700-703; Lucas, P.W., Pereira, B., Estimation of the fracture toughness of leaves (1990) Functional Ecology, 4, pp. 819-822; Maranon, T., Grubb, P.J., Physiological basis and ecological significance of the seed size - relative growth rate relationship in Mediterranean annuals (1993) Functional Ecology, 7, pp. 591-599; Meziane, D., Shipley, B., Interacting determinants of specific leaf area in 22 herbaceous species: Effects of irradiance and nutrient availability (1999) Plant, Cell and Environment, 22. , In press; Miroslavov, E.A., Kravkina, I.M., Comparative anatomy of leaves of mountain plants at different elevations (1990) Botanicheskii Zhurnal, 75, pp. 368-375. , in Russian; Miroslavov, E.A., Kravkina, I.M., The structural adaptation of chloroplasts and mitochondria to high mountain and extreme northern conditions (1990) Soviet Journal of Ecology, 21, pp. 36-42. , in Russian; Miroslavov, E.A., Kravkina, I.M., Comparative analysis of chloroplasts and mitochondria in leaf chlorenchyma from mountain plants grown at different altitudes (1991) Annals of Botany, 68, pp. 195-200; Mokronosov, A.T., Mesostructure and functional activity of photosynthetic apparatus (1978) Mesostructure and Functional Activity of Photosynthetic Apparatus, pp. 5-31. , Mokronosov AT, ed. Sverdlovsk, Russia. Urals State University, (in Russian); Mooney, H.A., Ferrer, P.J., Slatyer, R.P., Photosynthetic capacity and carbon allocation patterns in diverse growth forms of Eucalyptus (1978) Oecologia, 50, pp. 109-112; Nobel, P.S., Walker, D.B., Structure of photosynthetic leaf tissue (1985) Photosynthetic Mechanisms and the Environment, pp. 501-536. , Barber J, Baker NR, eds. Amsterdam, The Netherlands: Elsevier Science; Nobel, P.S., Zaragoza, L.J., Smith, W.K., Relation between mesophyll surface area, photosynthetic rate and illumination level during development of Plectrantus parviflorus Henkel (1975) Plant Physiology, 55, pp. 1067-1070; Patton, L., Jones, M.B., Some relationships between leaf anatomy and photosynthetic characteristics of willow (1989) New Phytologist, 111, pp. 657-661; Poorter, H., Remkes, C., Leaf area ratio and net assimilation rate of 24 wild species differing in relative growth rate (1990) Oecologia, 83, pp. 553-559; Pyankov, V.I., Ivanova, L.A., Lambers, H., Quantitative anatomy of photosynthetic tissues of plant species of different functional types in arboreal vegetation (1998) Inherent Variation in Plant Growth, Physiological Mechanisms and Ecological Consequences, pp. 71-87. , Lambers H, Poorter H, Van Vuuren MMI, eds. 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Leiden, The Netherlands: Backhuys Publishers; Shipley, B., Keddy, P.A., Moore, D.R.J., Lemky, K., Regeneration and establishment strategies of emergent macrophytes (1989) Journal of Ecology, 77, pp. 1093-1110; Tselniker, Y.L., (1978) The Physiological Basis of Tolerance of Tree Plants to Shadow., , Moscow, Russia: Nauka (in Russian); Wiltkowski, E.T.F., Lamont, B.B., Leaf specific mass confounds leaf density and thickness (1991) Oecologia, 88, pp. 486-493. },
    ABSTRACT = { This study examines interrelationships between eight leaf attributes (specific leaf mass, area, dry mass, lamina thickness, mesophyll cell number per cm2, mesophyll cell volume, chloroplast volume, and number of chloroplasts per mesophyll cell) in field-grown plants of 94 species from the Eastern Pamir Mountains, at elevations between 3800 and 4750 m. Unlike most other mountain areas, the Eastern Pamirs, Karakorum system, Tadjikistan provide localities where low temperatures and radiation combine with moisture stress at high altitudes. For all the attributes measured, significant differences were found between plants with different mesophyll types. Leaves with dorsiventral palisade structure (dorsal palisade, ventral spongy mesophyll cells) had thicker leaves with larger but fewer mesophyll cells, containing more and larger chloroplasts. These differences in mesophyll type are reflected in differences in the total surface of mesophyll cells per unit leaf area (A(mes)/A) or volume (A(mes)/V). Plants with isopalisade leaf structure (palisade cells under both dorsal and ventral surfaces) are more commonly xerophytes and their increased values of A(mes)/A and A(mes)/V decrease CO2 mesophyll resistance, which is an important adaptation to drought. Path analysis shows the critical importance of mesophyll cell volume in leading to the covariance between the different leaf attributes and hence to specific leaf mass (SLM), even though mesophyll cell volume is not itself strongly correlated with SLM. This is because mesophyll cell volume increases SLM through its effects on leaf thickness and chloroplast number per cell, but decreases SLM through its negative effect on mesophyll cell density. },
    KEYWORDS = { Alpine vegetation Mesophyll structure Path analysis SLA SLM Specific leaf area Specific leaf mass Structural equation modelling },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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