RESPONSE OF MAIZE GENOTYPES TO MANGANESE AND CHROMIUM APPLICATION | PLANT CELL BIOTECHNOLOGY AND MOLECULAR BIOLOGY

 Maize is a staple food in many European countries, and it is also used to make corn syrups, corn starch, and corn ethanol, among other things. Our climate has become contaminated as a result of human activities. The majority of heavy metals that affect crop production have been removed from industrial areas. The aim of this research was to look into the accumulation of Mn and Cr in the root, stem, and leaf, as well as the effects of metals on photosynthetic pigments in various maize genotypes, in order to figure out which genotype is best for phytoremediation. For this study, five different maize genotypes (30Y87, 31R88, Neelum, Pak afghoi, and White Corn) were chosen. To access the metal accumulation and photosynthetic parameters, different concentrations (0, 0.25M, and 0.50M) of Cr and Mn in the form MnCl2 and CrCl3 were added independently and in combination. During the study, three replications of each treatment were carried out. The accumulation of Cr and Mn in roots was found to be higher than in stems and leaves, according to the findings. Variety 31R88 accumulated more Cr, while the Neelum variety accumulated very little Cr and Mn. The statistical tools used to compare treatment means were analysis of variance (ANOVA) and Tukey's rang test (p 0.05). The differences between five different genotypes and different treatments for all parameters were substantial, according to ANOVA. Under heavy metal treatments, white corn and the Neelum variety were more tolerant and had higher phosynthetic pigment levels. As a result, both varieties are suitable for phytoremediation. Treatments of 0.25M CrCl3 resulted in high photosynthetic pigments, while treatments of 0.5M MnCl2 + 0.25M CrCl3 and 0.5M MnCl2 + 0.50M CrCl3 resulted in low photosynthetic pigments. The stem had the highest metal accumulation, while the roots had the lowest (stem>leaves>roots). Our research showed that heavy metals had an adverse effect on maize growth, but that maize crop plants could be used to remediate heavy metals from soils. The ability of maize genotypes to accumulate Cr and Mn is also dependent on the genetic behaviour of plant species, according to the findings.

Please see the link :- https://www.ikprress.org/index.php/PCBMB/article/view/5581

THE EFFECT OF Azotobacter chroococcum (A22 ISOLATE) ON IMPROVING THE GROWTH AND NUTRIENTS ABSORPTION OF MAIZE PLANTS TREATED WITH DIFFERENT LEVELS OF NITROGEN AND GROWN UNDER DIFFERENT SALT LEVELS | PLANT CELL BIOTECHNOLOGY AND MOLECULAR BIOLOGY

During the 2018 season, the pots experiment was performed in the canopy wired, College of Agriculture, University of Basrah, to determine the impact of Azotobacter chroococcum (A22 isolate) to boost the growth of maize grown in salt-affected soils, the experiment included four nitrogen levels 0, 50, 75 and 100 percent of the 150 kg N.ha-1 recommendation of nitrogen fertiliser, with three nitrogen levels. The results showed that A22 isolation inoculate increased dry weight by 22.25 percent and N, P and K absorbed by 37.04, 89.4 and 27.6 percent, respectively, compared to control un inoculates, inoculation with this isolate A22 decreased the recommendation for nitrogen fertiliser by 25 percent and improved maize growth under conditions of salt stress.

Please see the link :- https://www.ikprress.org/index.php/PCBMB/article/view/5376

IMPACTS OF MOLYBDENUM ON DROUGHT TOLERANCE OF SOME MAIZE (Zea mays L.) CULTIVARS AT SEEDLING STAGE | PLANT CELL BIOTECHNOLOGY AND MOLECULAR BIOLOGY

 One of the factors that inflict drastic effects on maize growth and productivity is drought stress. The harmful effects of drought stress on many crops have been proven to mitigate molybdenum (Mo). This paper presents the results of experiments on the effects of Mo on drought tolerance at the seedling stage of three varieties of maize, namely CP333, HN45, and HN68. Two experimental formulations were used: the control group was watered (F I) and the treatment group was sprayed from sowing to the stage of two true leaves with Mo liquid 0.03 percent (F II). After that, 1-day, 3-day, and 5-day artificial drought treatment was provided by stopping watering and spraying. The results show that, compared to the control group, Mo increased the drought resistance of three maize varieties. CP333 with its drought tolerance indices of 3207.10 in F I and 3613.37 in F II was the most drought tolerant line, followed by HN45 with 2790.62 in F I and 3213.14 in F II, and HN68 with drought tolerance indices of only 2621.79 in F I and 3012.53 in F II was the least drought tolerant cultivar. In addition, Mo was also shown to have a direct effect on the drought tolerance of maize varieties. The findings of the research serve as a theoretical basis for proposals to increase the resistance of certain maize cultivars in Vietnam to drought.

Please see the link :- https://www.ikprress.org/index.php/PCBMB/article/view/5252