drought tolerances of 55 indigenous strains of pseudomonas fluorescens were evaluated. to assess the tolerance rate of the strains to various levels of water deficit, their growth rate in nb medium containing concentrations of 40.587, 438.838 and 548.838 g of polyethylene glycol 6000 per liter of medium were utilized. water potentials of aforesaid levels were estimated as 0, - 10, - 20 and -30 ...

smirnovia iranica (sabeti) synonym: smirnovia turkestana (bunge) is a deciduous perennial bushy species of the fabaceae (papilionaceae) family. the species grow on sand dunes of desert areas, having a deep vertical root and very long horizontal or lateral roots. they have an important role in natural vegetation of desert and sand dune stabilization. limited growing areas, grazing due to good pa...

susceptibility of eggs, nymphs and adults of greenhouse whitefly (trialeurodes vaporariorum westwood) and adults of green peach aphid (myzus persicae sulzer) to pirimicarb (pirimor®) and citowett oil alone vs. in combination was evaluated under greenhouse conditions. the glass vial and leaf dipping methods were employed for bioassay of adults vs. the immature stages (egg, nymph and pupa) of gre...

in order to evaluate salinity tolerance in 20 sugar bee genotypes, an experiment was conducted in two fields with salinity (ec= 12 ds/m, ph= 7.6) and non-salinity stress, in the form of rcbd at miandoab agricultural research station. different morphological and physiological traits such as root yield, sugar percentage, white sugar percentage, molasses, n, na, k, syrup purity and green cover per...

the antagonistic effects of rhizobium spp. isolates against rhizoctonia solani (ag-4), the causal agent of bean damping-off were compared with each other in either of the in vitro and in vivo conditions. also their potential to produce such secondary antifungal metabolites as hcn, siderophore and protease were evaluated. the results indicated that, isolate rh3 reduced mycelial growth of r. sola...

Ammodendron persicum (Bunge & Boiss.)is a desert shrub specie which grows on some sand dunes and sandy areas of South Khorasan and Sistan-va-Baluchestan provinces in east of Iran. Low distribution and narrow ecological range have put this species under threat. In order to evaluate the possibility of long-term preservation of A. persicum seeds in cryogenic conditions (-196°C), the seeds of speci...