abstract salinity tolerance is one of the major factor influencing crop productivity in arid and semi-arid areas. the salinity tolerance of fruit trees can be enhanced through the use of tolerant rootstocks. this experiment was conducted to investigate the effects of salinity stress and rootstock on the growth, photosynthetic rate and nutrient concentrations of almond (prunus dulcis miller.) cv...

Ion concentrations in the roots of two barley (Hordeum vulgare) varieties that differed in NaCl tolerance were compared after exposure to NaCl. Triple-barreled H(+)-, K(+)-, and Na(+)-selective microelectrodes were used to measure cytosolic activities of the three ions after 5 and 8 d of NaCl stress. In both varieties of barley, it was only possible to record successfully from root cortical cel...

We report on the dynamic response of aqueous solution containing poly(N-isopropylacrylamide)-capped gold (pNIPAM-capped Au) nanoparticles to introduction NaCl. The addition NaCl increases density and prompts liquid–liquid phase separation process, confining polymer a lower-density salt-deficient phase. As pNIPAM-occupied becomes excluded from higher-density NaCl-rich bulk solution, pNIPAM-cappe...

Abstract Salinity is one of the major abiotic challenges influencing plant productivity worldwide. To examine the response of two alfalfa cultivars (Bami and Hamedani) to six levels of water salinity (0, 25, 50, 75, 100, 125 mM L-1 NaCl), a glasshouse experiment was conducted at the College of Agriculture, Shiraz University, Shiraz, Iran in 2008. The results showed that in Bami (which appeared...

Two alginate lyase isozymes, AkAly28 and AkAly33, with approximate molecular masses of 28 and 33kDa, respectively, were isolated from the digestive fluid of the common sea hare, Aplysia kurodai. Both of AkAly28 and AkAly33 were regarded as the endolytic polymannuronate (poly(M)) lyase (EC 4.2.2.3) since they preferably degraded poly(M)-rich substrate producing unsaturated tri- and disaccharides...

Homospermidine is a polyamine present in its highest concentrations in root nodule bacteria. By using the soybean rhizobia Rhizobium fredii P220 and Bradyrhizobium japonicum A1017, the effects of the pH and osmolarity of the medium on rhizobial growth and cellular polyamine contents were investigated. Elevation of medium pH repressed the growth of slowly growing B. japonicum A1017 and resulted ...

The use of seawater in horticulture is underestimated. Although pure harmful to most living plants, diluted could represent a promising integration meet the crop’s nutrient and water requirements. In current trial, we compared effects moderate high concentrations comparable NaCl solution on salt-tolerant (Tetragonia tetragonioides) salt-sensitive (Lactuca sativa) crop grown hydroponics. We test...

1.25 per cent gelatin solutions containing enough NaOH to bring them to pH 7.367 (or KOH to pH 7.203) were made up with various concentrations of NaCl, KCl and MgCl(2), alone and in mixtures, up to molar ionic strength. The effects of these salts on the pH were observed. MgCl(2) and NaCl alone lower the pH of the Na gelatinate or the K gelatinate, in all amounts of these salts. KCl first lowers...