There have been several reports on the utilization of oxygen during the cell life cycle (1-7), with particular emphasis on the question of whether there is any change during mitosis . One of the most elegant of these studies, the "Cartesian Diver" experiments of Holter and Zeuthen (1) on synchronous egg cells, indicated that the oxygen requirement was decreased in mitosis . While Scholander et ...

Plant somatic embryos are widely used in the fields of germplasm conservation, breeding for genetic engineering and artificial seed production. MicroRNAs (miRNAs) play pivotal roles in somatic embryogenesis (SE) regulation. However, their regulatory roles during various stages of SE remain unclear. In this study, six types of embryogenic samples of Lilium pumilum DC. Fisch., including organogen...

Reproduction of bats is determined by a suite of endogenous and exogenous factors. Among exogenous influences, special attention has been given to the influence of food availability. However, in highland forests, severe decreases in temperature during the cold and dry season may also play an important role. In the present study we tested the influence of ambient temperature and food availabilit...

The Solomon's lily arum mimics the odours of yeast to attract drosophilid flies as unrewarded pollinators.

lilium ledebourii (baker) boiss. (liliaceae) is a critically endangered lily species native tonorthern iran, where it is protected by law. in order to develop a cost effective method for largescalepropagation, the effects of three culture systems (solid, liquid and temporary immersion)and two types of cytokinins [6-benzyladenine (ba) and thidiazuron (tdz)] were studied onthe in vitro plant rege...