to evaluate the effect of water stress on yield and water use efficiency (wue) of lallemantia sp, an experiment was conducted as split plot factorial in randomized complete block design with three replications in the field of medicinal plants research center of shahed university, tehran in 1390-91. the first factor was irrigation system including 40 and 60 percent depletion of available soil wa...

abstract in order to investigate the freezing tolerance of field grown fennel (fueniculum vulgare mill) under controlled conditions, a factorial experiment based on completely randomized design was conducted with three replications in agricultural college, ferdowsi university of mashhad in 2004. treatments were two fennel ecotypes (khorasan and kerman), two planting dates (oct 8th and 29th ) an...

  Background: Garlic is a valuable medicinal plant with variability in desirable morphological and physiological characteristics. The analysis of genetic diversity plays an important role in breeding programs. The RAPD technique could be very effective in detecting genetic variation in garlic.  Objective: The objective of the present work was to detect molecular polymorphism among Iranian garli...

knowledge about genetic diversity is an essential step towards conservation of genetic resources and developing further strategies for plant improvement. the objective of this research was to evaluate the agronomical and morphological traits and determine the level of variation within wild barley ecotypes especially for acclimation traits. in this study 188 ecotypes of wild barley (hordeumspont...

The cyanobacterium Prochlorococcus is the most abundant photosynthetic cell on Earth and contributes to global ocean carbon cycling food webs. known for its extensive diversity that falls into two groups of ecotypes, low-light (LL) high-light (HL) adapted ecotypes. Previous work has shown niche partitioning very HL ecotypes subecotypes across oceanographic gradients including temperature, nutri...

Investigation of Some Physiological Traits in Dracocephalum Moldavica L. Ecotypes under Salt Stress Condition

Morphologically cryptic taxa must be accounted for when quantifying biodiversity and implementing effective conservation measures. Some orchids pollinated by sexual deception of male insects contain morphologically ecotypes, such as the warty hammer orchid Drakaea livida (Orchidaceae). This species is comprised three pollination which can distinguished based on differences in pollinator floral ...

Eavesdropping, the detection of communication signals by unintended receivers, can be beneficial in predator-prey interactions, competition, and cooperation. The cosmopolitan killer whale Orcinus orca has diverged into several ecotypes which exhibit specialised diets different vocal behaviours. These have diverse ecological relationships with other marine mammal species, sound could a reliable ...