Nitrogen Fixation in Leguminous Plants

Effects of Phytohormones on Nodulation and Nitrogen Fixation in Leguminous Plants

Leguminous plants form root nodules, in which symbiotic rhizobia fix atmospheric nitrogen. The nodulation process in the legume-rhizobium symbiosis consists of a series of events initiated by an exchange of specific signaling compounds between the two partners. The roots of leguminous plants secrete flavonoids, which trigger the synthesis of lipochitin-oligosac‐ charide signaling molecules, Nod...

On Photosynthesis and Free Nitrogen Assimilation by Leguminous Plants.

The Use of Nitrogen-15-depleted Ammonium Sulfate for Estimating Nitrogen Fixation by Leguminous Trees

The feasibility of using N-depleted (NH4)2S04 for assessing biological N2 fixation of leguminous trees was investigated. A slowgrowing species, lebbeck [Albizia lcbbeck (L.) Benthl, and a fastgrowing species, leucaena [Leucaena leucocephala (Lam.) de Wit] were inoculated with appropriate Rkizobium strains and grown under four different levels of N. Each week, 0, 5, 12.5, or 25 mg of Ndepleted (...

[Root nodule bacteria on leguminous plants].

Nitrogen Fixation

Plant growth is directly dependent upon an adequate supply of fixed nitrogen. Water and fixed nitrogen are the most common limiting factors for plant growth.There is an abundance of nitrogen in the atmosphere, but it is in the form of the relatively inert gas, N2, and this must be converted chemically or biologically into a more active form before plants can utilize it. Chemical fixation most c...