<span style="font-size: 19.0pt;mso-bidi-font-size:14.0pt;font-family:"Times New Roman","serif"">Influence of lead in soil on myconhizal development and plant growth of <i><span style="font-size:19.5pt;mso-bidi-font-size:14.5pt;font-family:"Times New Roman","serif"">Cyamopsis tetragonoloba </span></i><span style="font-size:19.0pt;mso-bidi-font-size:14.0pt; font-family:"Times New Roman","serif"">(Linn.) Taub </span></span>

Abstract

<span style="font-size: 14.0pt;mso-bidi-font-size:9.0pt;font-family:" times="" new="" roman","serif""="">Growth of <span style="font-size:14.5pt;mso-bidi-font-size:9.5pt;font-family: " times="" new="" roman","serif""="">C. <i><span style="font-size:13.5pt; mso-bidi-font-size:8.5pt;font-family:" times="" new="" roman","serif""="">tetragonoloba </span></i><span style="font-size:14.0pt;mso-bidi-font-size:9.0pt;font-family:" times="" new="" roman","serif""="">suffered with increase in concentration of Pb in soil. Plant biomass declined significantly at concentrations above 60 ppm of Pb. Roots showed more pronounced impact as compared to shoots. At highest applied

<span style="font-size: 14.0pt;mso-bidi-font-size:9.0pt;font-family:" times="" new="" roman","serif""="">concentration of lead (100 ppm), fresh weight of fruits decreased by 33% and dry weight by 52% as compared to control. No significant impact was noticed on the development of mycorrhiza at lower concentrations ( 15-45 ppm) of lead contamination. At higher concentrations of Pb (60 and 75 ppm), there was a decrease in VAM colonization. VAM hyphae had irregular size and terminated abruptly in outer cortex of root. Number of VAM fungal spores in rhizosphere also decreased with increase in the edaphic Pb concentration.

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