Hydraulic Conductance as a Factor Limiting Leaf Expansion of Phosphorus-Deficient Cotton Plants

Radin, John W.; Eidenbock, Marie P.

doi:10.1104/pp.75.2.372

Cited by 221 publications

(141 citation statements)

References 22 publications

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“…Hydraulic conductivity through detached root systems increases with increased P levels in nutrient solutions (Radin & Eidenbock, 1984) or tissue (Andersen et al, 1989). Increases in tissue P concentrations have been shown to account for a large amount of the VA mycorrhizal effect measured in Lp (Graham & Syvertsen, 1984) or whole plant water relations (Nelsen & Safir, 1982;Koide, 1985;Fitter, 1988), with some exceptions (Auge, Schekel & Wample, 1986).…”

Section: Phosphorus Nutrition and Lpmentioning

confidence: 99%

Root hydraulic conductivity and xylem sap levels of zeatin riboside and abscisic acid in ectomycorrhizal Douglas fir seedlings

1990

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SUMMARYMechanistic hypotheses to explain mycorrhizal enhancement of root hydraulic conductivity (Lp) suggest that phosphorus (P) nutrition, plant growth substances and/or altered morphology may be responsible. Such ideas are based on work with VA (vesicular-arbuscular) mycorrhizas. Since VA mycorrhizas and ectomycorrhizas differ m many respects, they may alter host plant water uptake via different mechanisms. This paper examines Lj, in various ectomycorrhizal associations while considering factors which are important to the VA mycorrhizal effect on Lp. Douglas fir Pseudotsuga menziesii (Mirb.) Franco] seedlings inoculated with the ectomycorrhizal fungi Laccaria bicolor (Maire) Orton and Hebeloma crustuliniforme (Bull, ex St. Amans) Quel. and non-inoculated seedlings infected naturally with Thelephora were grown under three low levels of P fertilization (1, 10 and 100/^M P). Seedling morphology, tissue P levels, Lp and plant growth substance levels in xylem sap were measured after nine months growth. Increased tissue P and decreased root/shoot ratio correlated with increased L^, in each of the mycorrhizal treatments. When adjusted for the effect of these two factors, Lp of Laccaria and Hebeloma seedlmgs was still lower than the Thelephora seedlings. In a subsequent experiment, the Lp of seedlings with Hebeloma and Rhizopogon vinicolor Smith mycorrhizas was compared to the Lp of non-mycorrhizal seedlings (grown at 100 mM P) and no differences were found among treatments. The lack of an ectomycorrhizal effect on Lp is quite different from the enhancement of host Lp by VA mycorrhizas. Zeatin riboside concentrations of Thelephora-and Hebeloma-infected seedlings were similar, yet higher than with Laccarta. There was no relationship between plant growth substances and Lp in ectomycorrhizal Douglas fir, despite lower zeatin riboside concentrations for Laccar/a-inoculated plants.

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Section: Phosphorus Nutrition and Lpmentioning

confidence: 99%

Root hydraulic conductivity and xylem sap levels of zeatin riboside and abscisic acid in ectomycorrhizal Douglas fir seedlings

1990

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“…Perhaps nutrient-induced reductions in root hydraulic conductivity, which have often been reported (Radin & Boyer 1982;Radin & Eidenbock 1984;Chapin et al 1988), can generate changes in xylem tension which then act as a signal for initiating the onset of regulated cell wall changes in growing leaf tissues (cf.…”

Section: ±1 14±3mentioning

confidence: 99%

“…For example, reductions in leaf accumulation of potassium ions have been associated with reductions in cell osmotic potential which apparently caused reductions in turgor pressure, cell expansion and leaf area development (Marschner 1986). Alternatively, Radin & Boyer (1982) and Radin & Eidenbock (1984) showed that deficiencies in nitrogen or phosphorus induced reductions in root hydraulic conductivity in sunflower (Helianthus annuus L.) and cotton (Gossypium hirsutum L) plants. These reductions appeared to cause reductions in leaf turgor and leaf area.…”

Section: Introductionmentioning

confidence: 99%

Mineral nutrient supply, cell wall adjustment and the control of leaf growth

Snir

Neumann

1997

Plant Cell & Environment

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The possibility that changes in the plasticity of expanding cell walls are involved in regulating early leaf growth responses to nutrient deficiencies in monocot plants was investigated. Intact maize seedlings (Zea mays L.) which were hydroponically grown with their roots in low-nutrient solution (1 mol m"^ CaCl2) showed early inhibition of first-leaf growth, as compared with seedlings on complete nutrient solution. This early inhibition of leaf growth was not associated with reduced cell production. However, segmental elongation along the cell expansion zone at the base of the leaf and the lengths of mature epidermal cells were reduced by the low-nutrient treatment. Solute (osmotic) potentials in the expanding leaf tissues were unchanged. In contrast, low-nutrient treatments significantly altered leaf plasticity, i.e. the irreversible extension caused by applying a small force in the direction of leaf growth. For example, in vivo plasticity decreased, along with leaf growth, after transfer of seedlings from complete nutrient solution to low-nutrient solution for 15 h. Conversely, in vivo plasticity increased, along with leaf growth, after transfer of plants previously grown on low-nutrient solution to complete nutrient solution for 15 h. The nutrient treatments also induced similar changes in the in vitro plasticity of the expanding leaf cell walls. There were no consistent changes in elasticity. Thus, reductions in the plasticity of expanding leaf cell walls appear to be involved in controlling the early inhibition of maize leaf growth by root imposition of nutrient stress.

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“…1 B). Secondary responses to P stress include change in the hydraulic conductivity of roots, and the resulting lower water potential may be a major reason for the reduced cell expansion in leaves (Radin and Eidenbock, 1984). Other possible reasons for the P limitation-induced growth inhibition could be lower cytokinin contents or decreased cell wall elasticity (Ei-D et al, 1979; A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT 9 Horgan and Wareing, 1980).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Physiological and molecular alterations in plants exposed to high [CO2] under phosphorus stress

Pandey

Zinta

AbdElgawad

et al. 2015

Biotechnology Advances

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Physiological and molecular alterations in plants exposed to high [CO 2 ] under phosphorus stress, Biotechnology Advances (2015Advances ( ), doi: 10.1016Advances ( /j.biotechadv.2015 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. This is the author's version of a work that was accepted for publication in Biotechnology Advances (Ed. Elsevier). Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Pandey, Renu et al. Fax: +91-11-25846420] has increased substantially in recent decades and will continue to do so, whereas the availability of phosphorus (P) is limited and unlikely to increase in the future. P is a non-renewable resource, and it is essential to every form of life. P is a key plant nutrient controlling the responsiveness of photosynthesis to [CO 2 ]. Increases in [CO 2 ] typically results in increased biomass through stimulation of net photosynthesis, and hence enhance the demand for P uptake. However, most soils contain low concentrations of available P.Therefore, low P is one of the major growth-limiting factors for plants in many agricultural and natural ecosystems. The adaptive responses of plants to [CO 2 ] and P availability encompass alterations at morphological, physiological, biochemical and molecular levels. In general low P reduces growth, whereas high [CO 2 ] enhances it particularly in C 3 plants. Photosynthetic capacity is often enhanced under high [CO

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Hydraulic Conductance as a Factor Limiting Leaf Expansion of Phosphorus-Deficient Cotton Plants

Cited by 221 publications

References 22 publications

Root hydraulic conductivity and xylem sap levels of zeatin riboside and abscisic acid in ectomycorrhizal Douglas fir seedlings

Root hydraulic conductivity and xylem sap levels of zeatin riboside and abscisic acid in ectomycorrhizal Douglas fir seedlings

Mineral nutrient supply, cell wall adjustment and the control of leaf growth

Physiological and molecular alterations in plants exposed to high [CO2] under phosphorus stress

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