[Physiological and agrochemical properties of different symbiotic genotypes of pea (Pisum sativum L.)].
Physiological characters of symbiotic mutants of pea were studied: nodulation, activities of nitrogenase and nitrate reductase, chlorophyll content in leaves and their water-holding capacity, biomass accumulation, and nitrogen forms. The parameters reflecting the genotype state of the macrosymbiont under soil conditions considerably varied. Supernodulation mutants stood out against symbiotic pea genotypes by high contents of chlorophyll and nonprotein nitrogen compounds, high nitrogenase activity, and low nitrate reductase activity. The efficiency of the legume-rhizobium symbiosis was largely mediated by the macrosymbiont genotype. The highest atmospheric nitrogen fixation (50-80%) was observed in the parental pea varieties. Despite the highest nitrogenase activity in the nodules, the supernodulation mutants were inferior to the parental varieties by the nitrogen fixation capacity (40-60%), which was due to their low productivity.
Nazariuk
V M
VM
Sidorova
K K
KK
Shumny
V K
VK
Kallimullina
F R
FR
Klenova M I
D005838:Genotype; D009586:Nitrogen Fixation / Q000235:genetics*; D018532:Pisum sativum / Q000235:genetics* / Q000382:microbiology; D012231:Rhizobium / Q000254:growth & development*; D053204:Root Nodules, Plant / Q000235:genetics* / Q000382:microbiology; D012988:Soil Microbiology; D013045:Species Specificity; D013559:Symbiosis / Q000235:genetics*