EurekaMag
+ Most Popular
Cunninghamia lanceolata plantations in China
Mammalian lairs in paleo ecological studies and palynology
Studies on technological possibilities in utilization of anhydrous milk fat for production of recombined butter-like products
Should right-sided fibroelastomas be operated upon?
Large esophageal lipoma
Apoptosis in the mammalian thymus during normal histogenesis and under various in vitro and in vivo experimental conditions
Poissons characoides nouveaux ou non signales de l'Ilha do Bananal, Bresil
Desensitizing efficacy of Colgate Sensitive Maximum Strength and Fresh Mint Sensodyne dentifrices
Administration of fluid by subcutaneous infusion: revival of a forgotten method
Tundra mosquito control - an impossible dream?
Schizophrenia for primary care providers: how to contribute to the care of a vulnerable patient population
Geochemical pattern analysis; method of describing the Southeastern limestone regional aquifer system
Incidence of low birth weights in a hospital of Mexico City
Tabanidae
Graded management intensity of grassland systems for enhancing floristic diversity
Microbiology and biochemistry of cheese and fermented milk
The ember tetra: a new pygmy characid tetra from the Rio das Mortes, Brazil, Hyphessobrycon amandae sp. n. (Pisces, Characoidei)
Risk factors of contrast-induced nephropathy in patients after coronary artery intervention
Renovation of onsite domestic wastewater in a poorly drained soil
Observations of the propagation velocity and formation mechanism of burst fractures caused by gunshot
Systolic blood pressure in a population of infants in the first year of life: the Brompton study
Haematological studies in rats fed with metanil yellow
Studies on pasteurellosis. I. A new species of Pasteurella encountered in chronic fowl cholera
Dormancy breaking and germination of Acacia salicina Lindl. seeds
therapy of lupus nephritis. a two-year prospective study

Ontogenetic scaling of phloem sieve tube anatomy and hydraulic resistance with tree height in Quercus rubra


Ontogenetic scaling of phloem sieve tube anatomy and hydraulic resistance with tree height in Quercus rubra



American Journal of Botany 107(6): 852-863



ISSN/ISBN: 1523-1739

PMID: 32468597

DOI: 10.1002/ajb2.1481

The dimensions of phloem sieve elements have been shown to vary as a function of tree height, decreasing hydraulic resistance as the transport pathway lengthens. However, little is known about ontogenetic patterns of sieve element scaling. Here we examine within a single species (Quercus rubra) how decreases in hydraulic resistance with distance from the plant apex are mediated by overall plant size. We sampled and imaged phloem tissue at multiple heights along the main stem and in the live crown of four size classes of trees using fluorescence and scanning electron microscopy. Sieve element length and radius, the number of sieve areas per compound plate, pore number, and pore radius were used to calculate total hydraulic resistance at each sampling location. Sieve element length varied with tree size, while sieve element radius, sieve pore radius, and the number of sieve areas per compound plate varied with sampling position. When data from all size classes were aggregated, all four variables followed a power-law trend with distance from the top of the tree. The net effect of these ontogenetic scalings was to make total hydraulic sieve tube resistance independent of tree height from 0.5 to over 20 m. Sieve element development responded to two pieces of information, tree size and distance from the apex, in a manner that conserved total sieve tube resistance across size classes. A further differentiated response between the phloem in the live crown and in the main stem is also suggested.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 072245634

Download citation: RISBibTeXText

Related references

Height-related scaling of phloem anatomy and the evolution of sieve element end wall types in woody plants. New Phytologist 214(1): 245-256, 2017

Mineral and organic nutrients in sieve tube exudate and xylem vessel sap of Quercus rubra L. Acta botanica Neerlandica 24(2): 237-239, 1975

Mineral and organic elements in sieve tube exudate and xylem vessel sap of Quercus rubra L. Acta Botanica Nederlandica 24(2): 237-239, 1975

Contribution to the knowledge of the sieve-tube disease (phloem necrosis) of the Coffee tree in Surinam. II. Phytopath. Zeitschr 4(5): 539-544, 1932

Contribution to the knowledge of the sieve-tube disease (phloem necrosis) of the Coffee tree in Surinam. III. Phytopath. Zeitschr 6(4): 335-357, 1933

Ontogenetic differences in physiology of Quercus rubra in response to prolonged drought A prelude to scaling ecosystem physiology. Bulletin of the Ecological Society of America 77(3 Suppl Part 2): 74, 1996

The relation between tree vigor of Prunus mahaleb L. types and sieve tube size in phloem tissue. Acta Horticulturae 410: 227-232, 1996

Contribution to the knowledge of the sieve-tube disease (phloem necrosis) of the Coffee tree in Surinam. I. Microscopic investigations and inoculation experiments. Phytopath. Zeitschr 4(1): 65-82, 1931

Water Flow Across the Sieve-Tube Boundary: Estimating Turgor and Some Implications for Phloem Loading and Unloading. Iii. Phloem in the Leaf. Annals of Botany 63(5): 561-570, 1989

Water flow across the sieve tube boundary estimating turgor and some implications for phloem loading and unloading ii. phloem in the stem. Annals of Botany 63(5): 551-560, 1989

Water flow across the sieve tube boundary estimating turgor and some implications for phloem loading and unloading iii. phloem in the leaf. Annals of Botany 63(5): 561-570, 1989

Sieve tube unloading and post-phloem transport of fluorescent tracers and proteins injected into sieve tubes via severed aphid stylets. Plant Physiology 123(1): 125-138, 2000

Growth and hydraulic (not mechanical) constraints govern the scaling of tree height and mass. Proceedings of the National Academy of Sciences of the United States of America 101(44): 15661-15663, 2004

Scaling of phloem hydraulic resistance in stems and leaves of the understory angiosperm shrub Illicium parviflorum. American Journal of Botany 106(2): 244-259, 2019

Height increment of 1-year shoots of the English oak (Quercus robur L.) and the northern red oak (Quercus borealis Michx. = Quercus rubra L.) on 4-year-old roots of seedlings raised from acorns stored over 1-5 winters. Arboretum Kornickie 7(27): 357-365, 1982