Photosynthetic rate in nodulating and non nodulating lines of Arachis hypogaea L.

Abstract

Photosynthetic rates in field-grown nodulating and non-nodulating lines of groundnut (Arachis hypogaea L.), were similar. However, in vivo nitrate reductase activity was significantly higher in leaves of the non-nodulating line compared to that its nodulating parental lines. It has been suggested that in the absence of nodule sink, diversion of photosynthates towards nitrate assimilation may to some extent relieve feedback control on photosynthesis.