Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2007.1243.1249Lathyrus sativus) Ecotypes under Root-Zone Temperatures]]>MahdaviB. Mahdavi Modarres SanavySeyed Ali Mohammad AghaalikhaniMajid 82007108In order to study the effect of four Root-Zone Temperatures (RZT) (5, 10, 15 and 25°C) on nodulation and nitrogen percent of four grasspea ecotypes (ardabil, zanjan, mashhad and sharkord), an experiment was conducted in a controlled-environmental chamber in 2005. There were differences (p<0.01) among ecotypes, RZT and ecotypes*RZT for root length, forage dry matter, root dry matter, nodule dry weight, nodule number, nodule cluster number, nodule cluster diameter, nodule diameter, nodule distribution (root length that has nodule) and plant nitrogen percent. Mashad and ardabil ecotypes produced the most and least nodule number at 25 and 5°C, respectively. The maximum and minimum nodule cluster number were observed in ardabil ecotype under 25 and 5°C RZT, respectively. Root distribution was the most and the least in mashhad and ardabil ecotypes under 25 and 5°C RZT, respectively. Ardabil produced the highest dry nodule weight at 25°C RZT. The least dry nodule weight was belonged to ardabil ecotype under 5°C RZT. Plant nitrogen percent was the highest in ardabile ecotype at 15°C RZT and the lowest in mashhad ecotype under 5°C RZT. This experiment showed that at low RZT (i.e., 5 and 10°C) none of ecotypes had preferred on other ecotypes in point of view measured traits except nodule diameter. Ardabile and mashhad ecotypes were better than other ecotypes at 15 and 25°C RZT respectively for most traits.]]>Amini Dehaghi, M. and S.A.M. Modarres Sanavy,20033131136Beck, D.P., L.A. Materom and F. Afandi,19931st Edn.,pp: 389pp: 389Bhuvaneswari, T.V., R.N. Goodman and W.D. Bauer,1980Glycine max L. Merr.) by Rhizobium japonicum. I. Location of infectible root cells.]]>6610271031Castillo, M., M. Flores, P. Mavingui, E. Martinez-Romero, R. Palacios and G. Hernandez,1999Sinorhizobium meliloti.]]>6527162722Christophe, R., S.T. Kholoud, O. Michel and G. Armand,200522267275Cocks, P., K. Siddiqae and C. Hambury,2000Crawford, R.M.M. and T.J. Huxter,197728917925Dart, P.J. and J.M. Day,19711971Decoteau, D.,19981998Dodds, J. and L. Roberts,19951995Duke, S.H., L.E. Schrader, M.G. Miller and R.L. Niece,1978Glycine max (L.) Merr. cc. Wells.] free amino acid pools during germination.]]>62642647Earnshaw, M.J.,198113425430Evans, H.J. and J.R.K. Savage,1959Vicia faba.]]>185161Gibson, A.H.,19672010971104Gibson, A.H.,19711971Graham, P.H.,1992Rhizobium and Brady rhizobium and nodulation under adverse soil conditions.]]>38475484Hardarson, G. and D.G. Jones,1979Rhizobium trifolii for nodulation of two white clover varieties.]]>92229236Kalinina, L.M., N.D. Alekhina and P. Primaka,19821982Kumarasinghe, R.M.K. and P.S. Nutman,1979Trifolium glomeratum by root nodule bacteria. I. The effects of constant root temperature on infection and related aspects of development.]]>30503515Layzell, D.B., P. Rochman and D.T. Canvin,198462965971Lie, T.A.,19811981pp: 104-134pp: 104-134Lynch, D.H. and D.L. Smith,1993Glycine max) nodulation and N2 fixation as affected by exposure to a low root-zone temperature.]]>88212220Matthews, D.J. and P. Hayes,198298371376McKay, I.A. and M.A. Djordjevic,1993Rhizobium leguminosarum bv. trifolii are disrupted by the same environmental factors that reduce nodulation in the field.]]>5933853392Moll, W.,1968299247251Muehlbauer, F.J. and A. Tullu,1997Lathyrus sativus L.]]>1997Papastilyanou, I.,19871042329Peltzer, S.C., L.K. Abbott and A.C. Atkins,2002Lupinus angustifolius L.).]]>53355365Prevost, D., P. Drouin and H. Antoun,19991999pp: 161-176pp: 161-176Prosperi, J.M.,19931993pp: 173-191pp: 173-191Rice, W.A. and P.E. Olsen,1988Rhizobium meliloti strains.]]>6137140Roughley, R.J. and R.A. Date,1986Trifolium semipilosum.]]>22123131SAS.,1997Sprent, J.T.,1982296387395Stevens, D.E.,19826011481152Walsh, K.B. and D.B. Layzell,198680249255Wang, F., X. Chen, Q. Chen, X.C. Qin and Z.X. Li,2000Lathyrus sativus by precolumn derivatization with 1-fluoro-2,4-dinitrobenzene.]]>883113118Webber, G.D.,19931993pp: 165-172pp: 165-172Zhang, F. and D.L. Smith,1994Glycine max (L.) Merr.] and Bradyrhizobium japonicum.]]>27914671473Zhang, F., D.H. Lynch and D.L. Smith,1995Glycine max (L.) Merr.] on nodulation and nitrogen fixation.]]>35279285Zhang, F., N. Dashti, H. Hynes and D.L. Smith, 1996Glycine max (L.) Merr.] nodulation and nitrogen fixation at suboptimal root zone temperatures.]]>77453460