Effect of foliar treatment with boron and zinc on physiological responses of cow pea [vigna sinensis Cv. cream 7]: I Growth parameters, auxins, growth inhibitor contents, yield components, mineral composition of the harvested seeds and their protein pattern

In the present investigation Vigna sinensis plants cv. Cream 7 were sprayed with 10, 50 and 250 mgL[-1] of boron or zinc. The effect of the two elements on growth, endogenous auxins and growth inhibitor levels of shoots and roots and activities of certain related enzymes, mineral composition of the harvested seeds and their protein pattern were investigated too. The results revealed that the low concentration of boron or zinc caused high significant increases in most of the growth parameters and yield components concomitantly with increases in auxin contents, catalase activity and reductions in growth inhibitor level and activities of IAA-oxidase and peroxidase while the highest concentration induced a reverse pattern. The phosphorus, potassium, sodium and calcium, iron, manganese, zinc, copper and boron contents were increased in the harvested seeds when Vigna sinensis plants were sprayed with boron or zinc. The scanning profiles for the banding pattern of each protein sample extracted from Vigna sinensis seeds harvested from plants previously sprayed with boron or zinc and extracted in Tris-Hcl buffer [pH 8.0] or Tris-Glycine buffer [pH 8.2] were studied. All concentrations applied of zinc and the highest concentration of boron induced de novo synthesis of a polypeptide with a molecular mass of 59 KD

interactive effect of water stress and each of ABA, alar and proline on certain metabolic activities in red radish plants

The interactions between each of ABA; 2 ppm [growth inhibitor], alar; 500 ppm [growth retardant] and proline; 100 ppm [amino acid] and water stress were undertaken in a trial to find out the best means in overcoming the injurious effect of soil drought on red radish plant. Under drought condition, the different treatments mentioned above caused remarkable increases in soluble sugars [reducing sugars and sucrose], polysaccharides, total sugars, 2-oxo-acids, amino-N, total soluble-N, total-N and protein-N above those of the untreated stressed plants, except that ABA-treated leaves contained less amounts of sucrose, at the later two ages, as compared with the untreated stressed ones. Moreover, foliar spraying of the stressed plants with both alar and proline resulted in the accumulation of each of P, Mg, Ca, Fe, B and Cu, with the exception that alar reduced the Cu values below the control amounts. In response to ABA treatment, P, Fe and B levels were elevated while Mg, Ca and Cu levels were decreased as being compared with those of the stressed untreated plants. Alar was found to be, the most effective applied chemicals for alleviating the adverse effect of drought on most of the metabolic activities of red radish plant