Glutamine synthetase of roots, etiolated cotyledons and green leaves from mustard plants cannot all clearly be separated by DEAE-Sephacel chromatography. However, the enzyme of the roots, etiolated cotyledons and green leaves, respectively, differed in the kinetic properties deter­ mined in the crude extract. The root enzyme showed a pH-optimum of about 6.9, a Km value of 3 m M for glutamate an...

The anthocyanin (Anth) content in leaves provides valuable information about the physiological status of plants. Thus, there is a need for accurate, efficient, practical methodologies to estimate this biochemical parameter. Ref lectance measurement is a means of quickly and nondestructively assessing leaf Anth content in situ. The objective of this study was to test the overall performance and ...

tolerance of two apple rootstocks (gami and m26) was evaluated at different concentrations of sodium chloride in vitro conditions. micro plants grown under ms medium culture were transferred to knoudson–c culture medium devoid of na and cl ions. concentrations of nacl in the knoudson-c culture medium were 0, 20, 40, 60, 80 and 100 mm/l. six weeks after culturing, data were collected. the result...

A study was undertaken of the physical and chemical characteristics and insecticide properties of melia (Melia azedarach L.) (Meliaceae) fruit and leaves; melia has been introduced in Chile for ornamental purposes. The physical and chemical properties were evaluated in two stages of fruit and leaf maturity, i.e., green /mature, and mature/juvenile, respectively. Laboratory bioassays were carrie...

As a spice and medicinal plant, Aloysia citriodora Palau (Family, Verbenaceae) is applied in nutritional and pharmacological purposes. According to the findings, many parameters relating to growth location and cultivation conditions, may affect on the secondary metabolites of the herb and result in different percentage of concerned constituents. Accordingly, present study was performed to compa...

Environmental stresses not only influence production of plant metabolites but could also modify their resorption during leaf senescence. The production-resorption dynamics of polyphenolic tannins, a class of defense compound whose ecological role extends beyond tissue senescence, could amplify the influence of climate on ecosystem processes. We studied the quantity, chemical composition, and ti...

Legumes are used as fodder and green manures, because of fix nitrogen biologically. The objective this study was to determine the emergence capacity early growth four legume species treated with different NaCl-stress concentrations. experiment established in a completely randomized design factorial arrangement, where first factor legumes’ (Vigna unguiculata L. Walp., Lablab purpureus (L.) Sweet...

The diurnal variations in volume and in specific weight were determined for green stems and leaves of Crassulacen acid metabolism (CAM) plants. Volume changes were measured by a water displacement method. Diurnal variations occurred in the volume of green CAM tissues. Their volume increased early in the light period reaching a maximum about mid-day, then the volume decreased to a minimum near m...