EurekaMag.com logo
+ Site Statistics
References:
48,253,228
Abstracts:
22,798,842
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

The use of lanthanum to delineate the aluminium signalling mechanisms functioning in the roots of Zea mays L


, : The use of lanthanum to delineate the aluminium signalling mechanisms functioning in the roots of Zea mays L. Environmental & Experimental Botany 32(4): 365-376

Controlled environment studies involving the treatment of intact roots with Al (5mg/dm-3) and La-3+ (25 mg/dm-3) have identified some notable similarities in the early reactions by primary roots to these ions. These included root growth inhibition, changes in cap size and construction as well as a marked decline in cap secretory activity. The effects of La-3+ nevertheless appeared to be less damaging to the root than comparable Al treatments (shorter lag periods and faster growth rates). Moreover, roots subjected to "continuous" La-3+ treatments resumed growth with times gtoreq 6 days whereas roots subjected to "continuous" Al treatment did not. These similarities and differences in the response of root cells to La-3+ and Al are discussed with a view to the possible development of La-3+ as an ultrastructural tracer for Al. Roots which had previously been treated with La-3+ or Al but which received Ca-2+ during the recovery phase resumed growth during the course of the experiment (8 days). In contrast Ca-2+ deprivation of roots initially subjected to Al or La-3+ treatments delayed and in some cases prevented recovery. The effects of Ca-2+ deprivation on the stages involved in recovery are discussed in relation to identifying an external (apoplasmic) Ca-2+ requirement which influences the activity of the root cap and mediates the reversal of growth inhibition attributed to the effects of La-3+ and Al. The requirement for an exogenous Ca-2+ supply is combined with data pertaining to Al- and La-3+-induced ultrastructural changes in the apoplasm of peripheral root cap cells to identify components of a stimulus-response system functioning in the root which is responsive to La-3+ and Al. Changes in La-3+- and Al-treated roots deprived of Ca-2+ during recovery also coincided with a re-orientation of shoot growth. These effects are considered in relation to a possible external requirement, by the root, for Ca-2+ which interacts with an endogenous programme involved in modulating shoot expansion and development.

Order PDF Full Text

Close
Close

Click here to order any other PDF Full Text


Accession: 002530409

DOI: 10.1016/0098-8472(92)90049-8

PDF Full Text: The use of lanthanum to delineate the aluminium signalling mechanisms functioning in the roots of Zea mays L


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Other references

Gøtzsche-Astrup, O.; Moskowitz, A., 2016: Personality disorders and the DSM-5: Scientific and extra-scientific factors in the maintenance of the status quo. The aim of this study was to review and discuss the evidence for dimensional classification of personality disorders and the historical and sociological bases of psychiatric nosology and research. Categorical and dimensional conceptualisations of...

Merritt, J.E.; Sullivan, J.A.; Drew, L.; Khan, A.; Wilson, K.; Mulqueen, M.; Harris, W.; Bradshaw, D.; Hill, C.H.; Rumsby, M.; Warr, R., 1999: The bisindolylmaleimide protein kinase C inhibitor, Ro 32-2241, reverses multidrug resistance in KB tumour cells. Ro 32-2241 is a bisindolylmaleimide that selectively inhibits protein kinase C (PKC) as compared with other protein kinases. Experiments were carried out to examine its potential as a multidrug resistance-reversing agent. Ro 32-2241 inhibited effl...

Husák, V., 1972: New methods for calculation of absorbed dose from radiopharmaceuticals. Radiobiologia, Radiotherapia 13(4): 459-469

Sanders Albert E.; Weems R.E.; Lemon E.M.J.., 1982: Chandler Bridge Formation; a new Oligocene stratigraphic unit in the lower coastal plain of South Carolina. U S

Dekhnik, T..; Sinyukova, I., 1976: A study of food supply as a factor determining the survival of larval marine fish. The literature on possible correlations between food supply and the survival of larvae in Azov kilka (Clupeonella delicatula delicatula), Azov anchovy (Engraulis encrasicholus maeoticus), Black Sea anchovy (E. e. ponticus), Black Sea scad (Trachur...

Balasch Cortina, J., 1983: Evaluation of the sterile couple. Medicina Clinica 80(20): 906-911

Spornitz U.M.; Makabe S.; Hafez E.S.E.; Van O.W.A.A., 1984: Scanning electron microscopy of the intra uterine device tail. The surface ultrastructure of the tails of various IUD [intrauterine device] (Multiload, Cu-7, Cu-T, Nova-T, FDI, Lippes Loop and Dalkon-Shield) was studied with the scanning electron microscope [with respect to safety and side effects]. The parts...

Gasparetto, C.; Gasparetto, M.; Morse, M.; Rooney, B.; Vredenburgh, J.J.; Long, G.D.; Rizzieri, D.A.; Loftis, J.; Chao, N.J.; Smith, C., 2002: Mobilization of dendritic cells from patients with breast cancer into peripheral blood stem cell leukapheresis samples using Flt-3-Ligand and G-CSF or GM-CSF. Treatment with myeloablative chemotherapy and autologous peripheral blood stem cell (PBSC) transplantation followed by vaccination with autologous dendritic cells (DCs) treated with tumor antigens is a promising therapeutic strategy for several ty...

Jiang, H.Y., 1991: Osteitis pubis as a similarity with prostatitis. Twenty-eight male patients with osteitis pubis are reported. The clinical symptoms of this disease are very similar to those of chronic prostatitis. The authors think that if the patients with symptoms of prostatitis (prostatodynia) and the clinic...

Yamada, D.; Morita, T., 1998: Purification and characterization of a Ca2+ -dependent prothrombin activator, multactivase, from the venom of Echis multisquamatus. We previously found a novel Ca2+-dependent prothrombin activator, designated as carinactivase-1, in Echis carinatus leucogaster venom [D. Yamada, F. Sekiya, and T. Morita (1996) J. Biol. Chem. 271, 5200-5207]. Of the Viperidae snake venoms examine...