Ion and Water Uptake in Relation to Root Development in Norway Spruce (Picea abies (L.) Karst.)

Häussling, M.; Jorns, C. A.; Lehmbecker, G.; Hecht‐Buchholz, Ch.; Marschner, H.

doi:10.1016/s0176-1617(88)80042-7

Cited by 137 publications

(48 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For castor bean, there was no significant change in S. ROMEIRO et al this ratio, which was about 0.65 regardless of Pb concentrations, thus suggesting parallel changes in growth of both roots and shoots. The inhibition of root growth may be due to a decrease in calcium in root tips, leading to a decrease in cell division or cell elongation (Haussling et al, 1988;Eun et al, 2000). The inhibition of growth of shoot may be due to a decrease in photosynthesis, in upsets mineral nutrition and water balance, changes hormonal status and affects membrane structure and permeability (Sharma and Dubey, 2005).…”

Section: Resultsmentioning

confidence: 99%

Lead uptake and tolerance of Ricinus communis L.

Romeiro¹,

Lagôa²,

Furlani

et al. 2006

Braz. J. Plant Physiol.

View full text Add to dashboard Cite

Phytoextraction is an important technique used for the decontamination of areas polluted by lead. Consequently, an understanding of the physiological responses to tolerance of tropical species subjected to increasing levels of contamination is fundamental before considering their use as phytoextractors in contaminated areas. The objective of this study was to assess the lead (Pb) uptake and the tolerance of Ricinus communis L. The plants were cultivated in nutrient solution in a greenhouse under controlled conditions. Lead was tested at concentrations of 0, 100, 200 and 400 µmol L -1 . The experimental set-up was a block design, using a 4 x 1 factorial scheme, with three replicates. Biometric analyses, photosynthesis rates, and Pb content in the nutritive solution as well as in roots and shoots were performed. In conclusion, R. communis L is a hyperaccumulator species for Pb and presents tolerance properties in lead light concentration. Lead uptake and tolerance of Ricinus communis L. Pontencial fitoextrator de Ricinus communis L. para chumbo:A fitoextração é uma técnica remediadora importante para áreas contaminadas por chumbo (Pb), sendo importantes os estudos que relacionam a tolerância de espécies de clima tropical, desenvolvidas em níveis crescentes de contaminação, com a sua fisiologia, para que possam ser cultivadas como fitoextratoras em áreas contaminadas. Este trabalho teve o objetivo de estudar a espécie Ricinus communis L. como potencial fitoextratora de Pb. As plantas foram cultivadas em solução nutritiva, em casa de vegetação, sob condições semi-controladas. Testaram-se as concentrações 0, 100, 200 e 400 µmol Pb L -1 . Os experimentos foram instalados em blocos ao acaso, em esquema fatorial 4 x 1, com três repetições. Foram realizadas análises biométricas e medidas as taxas de fotossíntese, bem como as concentrações de Pb na solução nutritiva, nas raízes e na parte aérea das plantas. Concluiu-se que R. communis L é uma espécie hiperacumuladora e apresenta tolerância ao Pb em baixas concentrações.Palavras-chave: chumbo, fitorremediação, mamona, metal pesado

show abstract

Section: Resultsmentioning

confidence: 99%

Lead uptake and tolerance of Ricinus communis L.

Romeiro¹,

Lagôa²,

Furlani

et al. 2006

Braz. J. Plant Physiol.

View full text Add to dashboard Cite

show abstract

“…Study of water and ion uptake by tree roots is complicated by the variety of roots that they possess, including taproots, various kinds of lateral roots, and mycorrhizal roots. This is illustrated by the differences in uptake observed by Haussling et al (3).…”

mentioning

confidence: 90%

Observation of a water-depletion region surrounding loblolly pine roots by magnetic resonance imaging.

MacFall

Johnson

Kramer

1990

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

Magnetic resonance imaging was used to study sand containing various amounts of water and roots of loblolly pine planted into similar sand. Spin-lattice (Ti) relaxation times of sand with water contents ranging from 0 to 25% (wt/wt) ranged from 472 to 1265 ms and increased with water content. Spin-spin (T2) relaxation times ranged from 54 to 76 ms and did not change in a discernible pattern with water content. Based on water content and measured Ti and 72 values, the signal intensity ofsand/water images was predicted to increase with water content in a linear fashion, with the slope of the lines increasing with the time of acquisition repetition (TR). Measured signal intensity from images of sand with various water contents was found to follow a similar pattern.

show abstract

“…Uptake of Ca2+, and less distinctly of Mg2+, is confined to the growing root zones ( 12), which is also where the primary accumulation of Al occurs (4,20). Short-term uptake experiments showed that Al directly affected Mg and Ca absorption in sorghum (14), while kinetic analysis indicated that All' competitively inhibited net Mg2" uptake by intact annual ryegrass roots (23).…”

mentioning

confidence: 99%

Competitive Al³⁺ Inhibition of Net Mg²⁺ Uptake by Intact Lolium multiflorum Roots

Rengel¹

1990

Plant Physiol.

View full text Add to dashboard Cite

Uptake of Ca2+, and less distinctly of Mg2+, is confined to the growing root zones ( 12), which is also where the primary accumulation of Al occurs (4, 20). Short-term uptake experiments showed that Al directly affected Mg and Ca absorption in sorghum (14), while kinetic analysis indicated that All' competitively inhibited net Mg2" uptake by intact annual ryegrass roots (23).No satisfactory explanation was offered for the observation that plants at younger stages are more sensitive to Al stress (27). It is known, however, that changes of the membrane structure during senescence result in higher permeability and the loss of selectivity (21). Consequently, the pattern of mineral uptake also changes with the plant age (7): internal accumulation of K decreases and that of Ca and Mg increases (3,24). It was also shown that the extent of Al interference with ion relationships in the Donnan free space of ryegrass roots decreased with plant age (22). Kinetic analysis of Al effects on the nutrient uptake process by plants of various ages does not appear to have been described previously.The objective of this study was to elucidate the effect of plant age on Al-related competitive inhibition of net Mg2' uptake by two ryegrass cultivars differing in Al tolerance.MATERIALS AND METHODS Seeds of two cultivars of annual ryegrass (Lolium multiflorum Lam., cv Wilo, relatively Al-sensitive, and Gulf, relatively Al-tolerant) were surface-sterilized, germinated, and grown in complete nutrient solution in the growth chamber as described earlier (24, 25). Nutrient solution (pH 6.0) was re-

show abstract

Ion and Water Uptake in Relation to Root Development in Norway Spruce (Picea abies (L.) Karst.)

Cited by 137 publications

References 23 publications

Lead uptake and tolerance of Ricinus communis L.

Lead uptake and tolerance of Ricinus communis L.

Observation of a water-depletion region surrounding loblolly pine roots by magnetic resonance imaging.

Competitive Al³⁺ Inhibition of Net Mg²⁺ Uptake by Intact Lolium multiflorum Roots

Contact Info

Product

Resources

About

Ion and Water Uptake in Relation to Root Development in Norway Spruce (Picea abies (L.) Karst.)

Cited by 137 publications

References 23 publications

Lead uptake and tolerance of Ricinus communis L.

Lead uptake and tolerance of Ricinus communis L.

Observation of a water-depletion region surrounding loblolly pine roots by magnetic resonance imaging.

Competitive Al3+ Inhibition of Net Mg2+ Uptake by Intact Lolium multiflorum Roots

Contact Info

Product

Resources

About

Competitive Al³⁺ Inhibition of Net Mg²⁺ Uptake by Intact Lolium multiflorum Roots