Volume No. 2 Issue No.: 3 Page No.: 314-319 January-March 2008

 

PHYSIOLOGICAL - MORPHOLOGICAL AND ANATOMICAL CHARACTERISTIC CHANGES OF Stipa barbata UNDER WATER DEFICIENCY CONDITIONS

 

A. Tavili

Department of Arid and Mountainous Regions Reclamation, Faculty of Natural Resources, University of Tehran, Karaj (Iran)

 

Received on : July 13, 2007

 

ABSTRACT

 

The aim of this research was to assess the changes of Stipa barbata when facing with water stress. The study was carried out at the greenhouse condition. The experiment was based on a completely randomized design of one species, three irrigation periods (3 days as control, 6 days and 12 days) and four replications. During study period morphological and physiological characteristics such as wilting percentage, leaf water potential, shoot and root dry weight, root:shoot ratio and amount of soluble carbohydrate were measured. Anatomical changes of leaf such as epiderm, paranchima and stomata condition were assessed too. Results showed that increase of irrigation periods intervals resulted in changes in some characteristics such as root weight, shoot weight, root:shoot ratio, soluble carbohydrae amount and stomata condition. In fact, these changes could be considered as drought resistance mechanisms of Stipa barbata.

 

Keywords : Physiological characteristics, Morphological characteristics, Anatomy, Water stress, Water defficiency, Stipan barbata

 

 

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