<span style="font-size: 20.0pt;mso-bidi-font-size:15.0pt;font-family:"Times New Roman","serif"">Lipochitooligosaccharides and legume <i><span style="font-size:18.5pt;mso-bidi-font-size:13.5pt; font-family:"Arial","sans-serif"">Rhizobium </span></i><span style="font-size: 20.0pt;mso-bidi-font-size:15.0pt;font-family:"Times New Roman","serif"">symbiosis-A new concept </span></span>

Abstract

<i><span style="font-size:14.0pt;mso-bidi-font-size:9.0pt;font-family:" times="" new="" roman","serif""="">Legume-Rhizobium </span></i><span style="font-size:14.0pt;mso-bidi-font-size:9.0pt;font-family: " times="" new="" roman","serif""="">symbiosis is a multistep process characterized by the formation of root nodules on the host plant. A number of genes from both symbiotic partners share information during the interaction process. Nodulation genes <i>(nod. Nol </i>and <i>noe) </i>have been classified as common nodulation genes and host specific <i>(hsn) </i>nodulation genes. Though common nodulation genes are enough to form root nodules, host specific nodulation genes are needed for specific interaction leading

<span style="font-size: 14.0pt;mso-bidi-font-size:9.0pt;font-family:" times="" new="" roman","serif""="">to formation of functional nodules. Core lipochitooligosaccharides (LCOs), the products of common nodulation genes are modified by the action of host specific nodulation genes. LCOs seem to <span style="font-size:13.0pt;mso-bidi-font-size: 8.0pt;font-family:" arial","sans-serif""="">be <span style="font-size:14.0pt; mso-bidi-font-size:9.0pt;font-family:" times="" new="" roman","serif""="">present in legumes as well as nonlegume and are known to act as a morphogen by acting as auxin-transport inhibitor. The understanding of Nod factor may contribute to reveal complex biological functions such as developmental regulation, signal transduction and plant morphogenesis.

</span></span></span></span>