Interactive effects of plant hormones (GA3 or ABA) and salinity on growth and some metabolites of wheat seedlings

Germination response of black and yellow seed coated canola (Brassica napus) lines to chemical treatments under cold temperature conditions

“…Canola seeds primed with ABA germinated earlier and showed a higher final percentage germination than un-primed seed, particularly under salt and osmotic stresses at low temperatures (Zheng et al 1998). In contrast to priming, pre-soaking wheat seeds in GA 3 increased the germination potential at moderate levels of salinity; however, ABA did not (Radi et al 2001).…”

Perspectives of phytohormones application to enhance salinity tolerance in plants

“…GA3-priming reduces ions (Na + , Cl − ) uptake and their partitioning in plant root and shoot under salinity stress that improved wheat germination [150]. Salt stress Perspectives of Phytohormones Application to Enhance Salinity Tolerance in Plants DOI: http://dx.doi.org/10.5772/intechopen.1003714 disturbs the hormonal balance that impairs plant development, whereas the use of phytohormone provides an interesting stress-reduction strategy in barley cultivar [151].…”

The Role of Seed Treatment with Bacterial Biofertilizer Azotobacter, Gibberellic Acid and Kinetin Before Planting in some Biochemical Characteristics in the subsequent Growth of Psidium guajava L. Seedlings

“…Increasing the concentration of nitrogen in the leaves leads to an increase in its content of chlorophyll pigment, because nitrogen is involved in the construction of chlorophyll pigment because it participates in the composition of porphyrin units that are included in the composition of the pigment, in addition to that, nitrogen is involved in the formation of nucleic and amino acids and proteins, as it works to increase the building of chloroplasts [11], as increasing the concentration of chlorophyll pigment in leaves positively affects physiological processes such as increasing the efficiency of photosynthesis in leaves and its products of carbohydrates, proteins, phenols, and enzymes [12], It is also clear from the data of the tables that gibberellic acid has a significant effect on all the individual characteristics of the studied factors, where the high concentrations of gibberellic acid significantly affected the content of leaves of carbohydrates, proteins, phenols and the activity of the peroxidase enzyme, the reason for this may be attributed to the physiological role that gibberellic acid plays in the absorption and redistribution of nutrients in the plant , Gibberellic acid also has an important role in activating some genes in cell chromosomes, which stimulates and activates deoxyribonucleic acid (DNA) and the formation of mRNA and thus leads to the construction of proteins, Also, gibberellic acid has an important role in stimulating the enzyme Amylase, which converts starch into simple sugars and thus leads to an increase in the carbohydrate content of the leaves [13], Also, gibberellic acid has an effect on increasing the number of ribosomes in the cell, which leads to an increase in building amino acids and total phenols [14]. Likewise, for kinetin, it had a significant effect on the studied traits, and this may be due to the fact that kinetin has an important role in increasing the rate of photosynthesis and the transfer of its products from construction sites to storage sites, which leads to an increase in the effective materials for the products of carbon metabolism represented by carbohydrates, phenols and proteins [9], in addition, kinetin works to stimulate nitrate reductase (NR) genes, converting enzymes, transport sugars, reduce the synthesis of proteolytic enzymes and build some enzymes necessary for carbon metabolism [15], [6] reported that kinetin contributes to delaying leaf senescence as a result of its role in increasing nitrogen accumulation in old leaf sites and decreasing its accumulation in new leaves, which leads to the accumulation of amino acids and increased protein synthesis.…”