Cotton is a globally important fiber crop, but many elite cultivars are recalcitrant to in vitro regeneration. We developed a callus-mediated plant regeneration protocol for the local
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Plant Growth Promoting Rhizobacteria (PGPR) were used in many previous studies for increasing plant growth and productivity. Some mechanisms were used to enhance the soil productivity such as mineral phosphate solubilization, siderophore production, biological nitrogen fixation, induced systemic resistance and indole acetic acid (IAA) production. Some of the related researches adopted the phosphate solubilization in organisms which was repressed in the presence of succinate resembling the phenomenon of catabolite repression. In addition, the sugar utilization pattern (monosaccharide, disaccharide, and trisaccharide), organisms showed the characteristics like slow and fast-growing rhizobia respectively. Whole-genome sequencing has been used for identifying unique genes in Fast-growing Rhizobia. Existing literature in PGPR studies has been considered and mechanisms for increasing plant growth and productivity have been identified. The review tries to analyse the mechanism of phosphate solubilization and sugar utilization in fast growing Rhizobia. On the contrary, repression due to various carbon sources such as succinate has been reported, leading to succinate mediated catabolite repression.
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Plant breeders have accumulated hybrid effects to increase food production in order to counteract the loss of arable land. Hybrids may possess novel genetic potential to increase agricultural productivity; however, the relationships between genetic resources for optimizing crop productivity remain mostly unclear. In this study, we recorded heterosis effects of genetically inherited traits by reciprocal hybridization of the
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Drought is one of the major abiotic factors that have a serious effect on the production of cereals crops including maize, which is grown widely in the world. Screening based on drought facilitates selection of inbred lines and an understanding of drought-tolerant traits. The effect of drought stress and rescue after stress on maize inbred lines was investigated in this study. Different plant growth attributes namely plant height, leaf area and weight, stem weight, root length, shoot and root fresh and dry weight, and total leaf chlorophyll content were measured. Six flint inbred lines (FLD 12, FLD 23, FLD 24, FLD 33, FLD 35, and FLD 37) were screened as drought-tolerant lines, whereas another six flint inbred lines (FLD 01, FLD 13, FLD 16, FLD 18, FLD 29, and FLD 31) were screened as drought susceptible lines. Growth attributes under different drought conditions were subjected to a correlation test and analysis of variance and showed highly significant relationships with each other. The drought effect differed with different inbred lines, indicating a wide variability of drought response at the early growth stage of maize plants. The results obtained from this study will be useful for selecting maize inbred lines in future breeding programs for enhancing drought tolerance.
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