Occurrence of reaction wood in some primitive dicotyledonous species

Some Eocene Dicotyledonous Woods from Eden Valley, Wyoming

The Occurrence and Intensity of Eustrongylides excisus (Nematoda; Dioctophymidae) in Some Bony Fish Species of Caspian Sea and Its Basin

The fishery of bony fishes has an economic important in southern part of Caspian Sea ,but there are few reports about the pathogens of them in this area .Eustrongylides excisus , a parasite (Nematoda: Dioctophymidae) can damage the muscles of bony fishes . So, consumers avoid to buy the infected fish. Hence , the parasite can cause economic loss.In order to determine the occurance and intensity...

ENDOPHYTIC SPECIES OF NEOTYPHODIUM ON SOME GRAMINEOUS SPECIES IN IRAN

Some members of the familyClavicipitaceae are endophytic and have mutualistic relationship with the plant family Poaceae. Their relationship is beneficial for both host and fungus. In the present investigation, endophytic fungi were isolated from seed and leaf sheath of hosts Festuca arundinacea, F. ovina, F. pratensis, Bromus tomentellus, Melica persica and Lolium prenne. Morphological charact...

New species of wood inhabiting discomycetes of Helotilaes for Iran

Four species of wood inhabiting cup fungi belonging to order Helotiales are reported for the first time in Iran. Species are described and illustrated with photographs and drawings. Three genera Arachnopeziza, Hymenoscyphus and Lachnum are new records for Iran.

A review on structures of secondary wall in reaction wood fiber of hardwood species

Due to a non-vertical orientation of the stem or branch, which may begin as responses of prevailing winds, snow, slope, or asymmetric crown shape, a specialized wood tissue forms, is called “reaction wood”. In hardwood species, the reaction wood tends to form on the upper side of a leaning stem or branch, is known to as “tension wood”. It is usually related with eccentric growth and changes in ...