Effect of pressmud amended pyrite on symbiotic N₂‐fixation, active iron contents of nodules, grain yield and quality of chick pea(cicer arietinumLinn.) Genotypes in calcareous soil

Abstract

Pressmud amended pyrite (8 q pyrite + 50 q/ha pressmud or 16 q pyrite + 50 q pressmud/ha) resulted in significantly higher nodule number/ plant, their dry-weight/plant, N 2 ase activity, active iron content of nodules, grain yield, acetone soluble content of leaves, iron content of seeds, methionine and cysteine contents of seeds than pyrite or pressmud alone. Differential response of genotypes to different treatment was observed in the order of C 235 > H 208 > BR 77 and their interactions with pyrite and pressmud were also found significant. Maximum yield was observed in variety C 235 followed by H 208 and BR 77. In the contrast maximum acetone soluble content of leaves was found in genotype BR 77 followed by H 208 and C 235. Pressmud is sugarcane waste.

Inadequate iron supply and high bicarbonate impair the symbiosis of peanuts (Arachis hypogaea L.) with different Bradyrhizobium strains

“…Secondly, increasing iron supply markedly increased both specific acetylene reduction activity and total activity of peanut nodules. Increased acetylene reduction activity by iron supplementation was also previously reported for peanut (O'Hara et al, 1988a), mungbean (Chahal and Chahal, 1988), chickpea (Rai et al, 1982) and lentil (Rai et al, 1984). Moreover, in the present study, nodules had higher iron concentrations than either roots or shoots of host plants, implying that nodule function may require higher internal iron concentrations than host plant growth.…”

Symbiotic response of common bean (Phaseolus vulgaris L.) to iron deficiency

“…These results are in agreement with other studies conducted on chickpea (Rai et al 1982), lentil (Rai Table 2 Iron use efficiency for superoxide dismutase activity (FeUE SOD, U SOD/lg Fe) defined as the ratio of SOD activity (U SOD g nod DW À1 , one unit of SOD activity was defined as the volume of sample causing 50% inhibition in colour development, see Materials and methods) to nodule Fe-concentration (lg Fe (mg DW) À1 ), Fe-use efficiency for peroxidase activity (FeUE POD, mmol oxidized dianizidine mn À1 /lg Fe) defined as the ratio of POD activity (mmol oxidized dianizidine mn À1 g nod DW À1 ) to nodule Fe-concentration (lg Fe (mg DW) À1 ), Fe-use efficiency for catalase activity (FeUE CAT, mmol H 2 O 2 mn À1 /lg Fe) defined as the ratio of CAT activity (mmol H 2 O 2 mn À1 g nod DW À1 ) to nodule Fe-concentration (lg Fe (mg DW) À1 ) and Fe-use efficiency for leghaemoglobin accumulation (FeUE Lb, lg Lb/lg Fe) defined as the ratio of leghaemoglobin concentration (mg g nod DW À1 ) to nodule Fe-concentration (lg Fe (mg DW) À1 ). Lower case letters indicates differences (P < 0.05, Ducan test) between treatments Fig.…”

A study on the improvement iron nutrition of peanut intercropping with maize on nitrogen fixation at early stages of growth of peanut on a calcareous soil

“…Nodule initiation and development are strongly dependent on Fe supply, but the stage of nodule initiation or development most sensitive to Fe deficiency appears likely to vary with legume species (Tang et al 1992;Pike et al 1997). Iron deficiency resulted in decreased nodule number and nodule mass in chickpea, lentil (Rai et al 1982(Rai et al , 1984, French bean (Hemantaranjan 1988), andpeanut (O'Hara et al1988a). Iron deficiency generally decreases nodule formation, leghemoglobin production, and nitrogenase activity, leading to low N concentrations in the shoots in some legumes.…”