Phosphorus solubilizing bacteria and rice straw biochar consequence on maize pigments synthesis

Abstract

To determine the effect of phosphorus solubilizing bacteria and biochar various application rates on fresh and dry weight, photosynthetic and accessory pigments production in maize plants a pot experiment was conducted. There were 4 doses of Rice straw biochar (0, 1, 2 and 3%) with and without phosphorus solubilizing bacteria (PSB) making 8 treatments with 4 replications (CRD). After 40, days of seeds sowing plants were harvested and pigments (chlorophyll a, chlorophyll b, total chlorophyll, lycopene, carotenoids and anthocyanin) analysis was done in maize shoot as well as pH, EC (µS/cm) and OM (%) in post harvested soil. Results indicated a significant increase in soil pH, EC and OM due to addition of 1%, 2% and 3% rice straw biochar (RSB) which helps in enhancing the activity of photosynthesis by providing nutrients. PSB significantly reduced the pH of soil through organic secretions and OM by decomposition. Interactive effect of PSB and biochar was significant for chlorophyll (a, b, total) while it changed the lycopene, carotenoids and anthocyanin synthesis non significantly. In case of lycopene the maximum synthesis was noted in control (B0P0) treatment plants. The plants cultivated in a soil having treatment 3% rice straw biochar + PSB showed maximum production of pigments as compared to the control (B0P0) treatment plants.The main and interactive effects of RSB as well as PSB were significant on maize plants fresh and dry weight. An increasing rate of biochar enhanced the fresh and dry weight gain in combination with PSB.

Drought Stress Alleviation by ACC Deaminase Producing Achromobacter xylosoxidans and Enterobacter cloacae, with and without Timber Waste Biochar in Maize

“…Roots secrete organic acids, sugars, vitamins, phytosiderophores, nucleosides amino acids and mucilage, that attract PGPRs and resulted in better colonization of PGPRs, uptake of water and nutrients [85][86][87]. However, it is well documented that the colonization of PGPR is also improved when PGPR are inoculated with biochar [47]. In current study inoculation of E. cloacae and A. xylosoxidans TWBC significantly decreased electrolyte leakage over control is another solid evidence of less ethylene accumulation under drought stress.…”

“…A lot of work on the sole application of BC and drought-tolerant ACCD containing PGPRs has been done [43][44][45][46][47][48][49][50], but little investigation has been made regarding the cumulative use of drought-tolerant ACCD containing PGPR with timber waste biochar (TWBC) to alleviate the drought stress in maize. It is hypothesized that the use of drought-tolerant ACCD containing PGPR and TWBC may be an effective and environmentally friendly approach to mitigate drought stress in maize.…”

Regulation of Phosphorus and Zinc Uptake in Relation to Arbuscular Mycorrhizal Fungi for Better Maize Growth

“…It also regulates cell signaling processes and phosphorylation [19]. Uptake of P is highly affected by root growth due to its immobility in the soil medium [20][21][22][23][24]. Its deficiency is most common during the early growth of plants and under cold soil conditions [19,25].…”

Sustainable Management with Mycorrhizae and Phosphate Solubilizing Bacteria for Enhanced Phosphorus Uptake in Calcareous Soils

“…Dual inoculations of beneficial soil microorganisms, including rhizobacteria and AMF have been observed to enhance nutrients' uptake and production of different crops to a greater extent than single inoculation even under stress environment [22][23][24][25][26][27][28][29]. Research shows that the interaction of AMF with certain plant growth-promoting rhizobacteria enhances the activity of AMF in the rhizosphere, resulting in increases in P, Zn, and Cu uptake by maize plants [17,30].…”