+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Differential toxicity of heavy metals to growth and nitrate reductase activity of Sesamum indicum seedlings

, : Differential toxicity of heavy metals to growth and nitrate reductase activity of Sesamum indicum seedlings. Phytochemistry (Oxford) 35(5): 1153-1156

The response observed for biomass accumulation in Sesamum indicum L cv PB-1 seedlings during early growth phase induced by 1.0 mM Ph-2+ supply in our earlier studies was not persistent when 1.0 mM Cu-2+ and Cd-2+ were supplied either alone or in the various combinations of Ph-2+, Cu-2+ and Cd-2+. Root and leaf fresh weights of the seedlings were hardly affected due to supply of 1.0 mM Ph-2+, whereas Cu-2+ and Cd-2+ caused a drastic decrease in the tissue fresh weight which was more pronounced in the roots. The dry weight of the roots showed a similar effect, however, leaf dry weight was increased with the metal supply. In vivo nitrate reductase activity (NRA, EC was significantly inhibited in roots in the order Pb-2+ gt Cu-2+ gt Cd-2+. Leaf NRA was inhibited with Cu-2+ supply and with the combinations of the metals. The in vitro enzyme activity, on the other hand, was increased in most of the cases due to the metal supply. Further, total organic nitrogen of the young roots and in several cases in the leaves also increased with the metal supply, possibly because of increased translocation of nitrogen from seed to growing seedlings. The results show that growth and nitrate reduction of this cultivar of sesame respond differentially to Pb-2+, Cu-2+ and Cd-2+, and the effect was specific to the tissue examined.


DOI: 10.1016/s0031-9422(00)94812-x

Other references

Vasilevskaya, N.L., 2010: Desamination of certain amino acids in the organism (angio-chemical examination). Biulleten' Eksperimental'noi Biologii i Meditsiny 19(3): 63-66

Pedersen, O.Lederballe., 2004: Dual blockade of the renin-angiotensin system--is it of clinical significance?. Ugeskrift for Laeger 166(43): 3797-3797

Shchelko, L.G.; Guseva, K.A., 1979: Racial composition of loose smut of barley in the north-western area and evaluation of initial material for resistance to the disease. A study of 17 geographical populations of Ustilago nuda showed that race 3 is most widely distributed in the Komi ASSR and in Leningrad and Vologda provinces on the varieties Pirkka and Moskovskii 121 [Moscow 121]. In Arkhangel'sk province, t...

Loerbroks, C.; Rinaldi, R.; Thiel, W., 2014: The electronic nature of the 1,4-β-glycosidic bond and its chemical environment: DFT insights into cellulose chemistry. The molecular understanding of the chemistry of 1,4-β-glucans is essential for designing new approaches to the conversion of cellulose into platform chemicals and biofuels. In this endeavor, much attention has been paid to the role of hydrogen bo...

El-Gaby, M.; Zhang, Y.; Wolf, K.; Schwiening, C.J.; Paulsen, O.; Shipton, O.A., 2016: Archaerhodopsin Selectively and Reversibly Silences Synaptic Transmission through Altered pH. Tools that allow acute and selective silencing of synaptic transmission in vivo would be invaluable for understanding the synaptic basis of specific behaviors. Here, we show that presynaptic expression of the proton pump archaerhodopsin enables r...

Roufflac, R.; Lattes, A.; Valdiguie, P., 1963: Estimation of ioniza-tion constants by paper chromatography. Theoretical bases of estimation of ionization constants (pKa) by calculations from Rf values at different pH levels are developed mathematically. Ionization constants found for quinine, 8.1; codeine, 7.9; thebaine, 8.5; morphine, 7.7; cocaine, 8.6...

Ellis N.R., 1991: Automatic and effortful processes in memory for spatial location. According to Hasher and Zacks (1979), memory for spatial location is automatically encoded and cannot be improved by intent. In this study, groups of subjects viewed 124 photographs on posters (4 on each) with instructions to remember the location...

Cabanillas, A.M.; Masini-Repiso, A.M.; Costamagna, M.E.; Pellizas, C.; Coleoni, A.H., 1994: Thyroid iodide transport is reduced by administration of monoamine oxidase A inhibitors to rats. The present work was addressed to study a possible relationship between monoamine oxidase (MAO) and the thyroid iodide transport mechanism. Normal rats treated with clorgyline (a selective MAO-A inhibitor) or tranylcypromine (a non-selective MAO i...

Pitz, M.; Schmid, O.; Heinrich, J.; Birmili, W.; Maguhn, Jüurgen.; Zimmermann, R.; Wichmann, H.Erich.; Peters, A.; Cyrys, J., 2008: Seasonal and diurnal variation of PM2.5 apparent particle density in urban air in Augsburg, Germany. The apparent particle density of particulate matter with aerodynamic diameter < 2.5 microm (rho2.5) was determined at an urban site in Augsburg, Germany and its correlation with chemical composition and meteorological conditions was investigate...

Inama, G., 1999: Apropos the reuse of catheters in electrophysiology. Giornale Italiano di Cardiologia 29(3): 321-322