Paper Information

Journal:   IRANIAN JOURNAL OF HORTICULTURAL SCIENCES (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)   2010 , Volume 41 , Number 2; Page(s) 179 To 188.
 
Paper: 

STUDY OF SOME PHYSIOLOGICAL CHARACTERISTICS IN 'SAHANI', 'BIDANE-SEFID' AND 'FARKHII' GRAPES DURING DROUGHT STRESS AND THEIR SUBSEQUENT RECOVERY

 
 
Author(s):  GHADERI NASER*, TALAEI ALI REZA, EBADI ALI, LESANI HOSSEIN
 
* UNIVERSITY COLLEGE OF AGRICULTURE AND NATURAL RESOURCES, UNIVERSITY OF TEHRAN
 
Abstract: 

In order to evaluate the effect of different levels of drought stress on some physiological parameters in grapevine, a potted experiment with Iranian grapevine cultivars 'Sahani', 'Bidane-sefid' and 'Parkhii' was conducted in summer of 2008.
The experiment was performed while employing four drought stress (water potential of soil,
Ys=-0.2, -0.6, -1, -1.5 MPa) treatments each in three replications. The experimental design was a factorial one on the basis of a randomized complete block design. Such physiological parameters as: leaf Relative Water Content (RWC), Membrane Stability Index (MSI), net photosynthesis (A), stomatal conductance (g), transpiration (E), sub stomatal CO2 concentration (Ci) and water use efficiency (Algs), were assessed in grape leaves subjected to different drought stress conditions and recovery of these parameters following rewatering. The study shows that RWC, MSI, A, gs, E, were decreased as soil water content was reduced. AIgs was maximum in all cultivars under -1 MPa. 'Sahani' benefitted from a higher photosynthesis, than 'Bidane-sefid' and 'Parkhii' under control as well as under -1 MPa treatments.
'Sahani' had a higher stability in gas exchange as compared with other cultivars. Ci value was first reduced and then increased in the three cultivars. Water use efficiency (Algs) increased with increase in drought stress severity until -1 MPa. There was a close relationship observed between A and gs in all the cultivars. Results of the present experiment showed that gas exchange recovery (following rewatering) was fast under mild and moderate drought stress conditions, while under severe drought stress conditions, gas exchange recovery needed at least four days.

 
Keyword(s): GRAPEVINE, DROUGHT, PHOTOSYNTHESIS, STOMATAL CONDUCTANCE, WATER USE EFFICIENCY
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 46
 
Latest on Blog
Enter SID Blog