Soybean (Glycine max [L.] Merr.) plants were nodulated (Bradyrhizobium japonicum) and either inoculated with the vesicular-arbuscular mycorrhizal (VAM) fungus Glomus mosseae (Nicol. & Gerd.) Gerd. and Trappe or left uncolonized. All plants were grown unstressed for 21 days initially. After this period, some VAM and non-VAM plants were exposed to four 8-day drought cycles while others were kept ...

The objective of this study was to examine the influence of N(2) fixation and NO(3) (-)-N and urea-N assimilation on ion balance, uptake, and transport processes in soybean (Glycine max L. Merr.).Inoculated plants were grown in Perlite supplied daily with nutrient solutions which contained zero-N, 10 and 20 millimolar NO(3) (-)-N, and 10 and 20 millimolar urea-N, and they were sampled 41, 76, a...

eaf plants normally consume coal and coke as reactants, alloying elements, or fuel. the price of these materials varies from € 0.20-0.35/kg. this is while nearly 10 million pieces of tires are annually discarded in iran. the present study shows that scrap tires can be used as a substitute for coal and coke in eaf plants. thirteen grades of steel including low, medium, and high carbon steels as ...

BACKGROUND AND AIMS Water limitations can inhibit photosynthesis and change gene expression in ways that diminish or prevent reproductive development in plants. Sucrose fed to the plants can reverse the effects. To test whether the reversal acts generally by replacing the losses from photosynthesis, sucrose was fed to the stems of shaded maize plants (Zea mays) during reproductive development. ...

Plant quality of dioecious hydrilla was studied as a factor that may influence larval survival, growth, and development of the biological control agent Bagous hydrillae. Nitrogen content and stem toughness of hydrilla varied among the five sites studied and between summer and fall collections. The nitrogen content of hydrilla collected during summer ranged from 1.2 to 3.6% (dry weight) and duri...

Angiotensin-converting enzymes (ACEs) are key components of the renin-angiotensin system in mammals. However, the function of ACE homologs in insect saliva is unclear. Aphids presumably deliver effector proteins via saliva into plant cells to maintain a compatible insect-plant interaction. In this study, we showed that ACE modulates aphid-plant interactions by affecting feeding behavior and sur...

Carrot purple leaf disease was first reported in 2006 in the state of Washington and was associated with Spiroplasma citri. The disease also was reported in California in 2008. The objectives of this work were to fulfill Koch's postulates and to determine 1) whether the beet leafhopper, Circulifer tenellus (Baker) (Hemiptera: Cicadellidae), transmits carrot [Daucus carota L. subsp. Sativus (Hof...