Leguminous species

Soybean leaf extracts have not previously been reported to be phytotoxic however many other leguminous species have been shown to be active (1,17). The possible allelopathic activity of soybean indicated by these bloassays is potentially economically important, since soybean is a major crop world wide. 

Morris and Walker (2002) mixed dried ground plant tissues from 20 leguminous species with Meloidogyne incognita-infested soil at 1, 2 or 2.5, and 5% (w/w) and incubated for 1 week at room temperature (21 to 27°C). Tomato ( Rutgers ) seedlings were transplanted into infested soil to determine nematode viability. Most tissues... 

Naturally high nitrate concentrations may occur in groundwater in semiarid or arid areas where there is widespread termite activity, or where natural vegetation is dominated by leguminous species such as acacias. However, nitrate is usually found in groundwater and surface water due to agricultural activity or leaking effluent from on-site sanitation. 

The molybdenum (Mo) is the one of the most important trace elements, being essential for plants and animals. The most important biogeochemical role of this metal is related to the process of biological fixation of molecule nitrogen (N2) from the atmosphere, since Mo is the obligatory constituent of the relevant biochemical ferment at N-fixing leguminous species. 

In the first year, under conditions of low precipitation and low hydrological flow, N accumulation was substantial, about 134 kg/ha/year. Accumulated N decreased up to 97 kg/ha/year with greater runoff outflow during the second year, while in the third year, high water flow leached 50 kg/ha/year, but the agroecosystem still accumulated nitrogen due to a leguminous species in crop rotation. 

Table 15.2. Mo uptake by several leguminous species as influenced by liming of acid soils...

Electroporation-Mediated DNA Delivery to Embryos of Leguminous Species... 

The electric conditions given in this protocol are the result of optimizations for a particular genotype of P. vulgaris (Admires). These conditions permit gene delivery in all Phaseolus cultivars tested, as well as in a number of other leguminous species. For optimal results, however, pulse amplitude and pulse length should be optimized for the species and genotype under study. 

IsofLavones-. These flavonoids are among the less-widely distributed flavonoids in nature, but they are the compounds most frequently tested for in humans [13]. The only important amount of these compounds were found in leguminous species, especially in soybeans, black beans, and green peas, the most common isoflavones being genistein, daidzein, and glycitein. In addition, these compounds undergo various reactions such as methylation, hydroxylation, or polymerization that lead from simple (isoflavanones, isoflavans, and isoflavanols) to more complex structures (rotenoids, pterocarpans, and coumestans) [12]. 

Canavanine (23) is a well-known constituent of Leguminosae. " Its degradation product, canaline (24), has also been identified in several leguminous species. Fission of canavanine in Caragana spinosa to canaline and urea has been studied both in vivo and in vitro. Part of the canaline is further degraded... 

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