Paper Information

Journal:   JOURNAL OF PLANT PROCESS AND FUNCTION   SPRING 2016 , Volume 5 , Number 15; Page(s) 123 To 131.
 
Paper: 

EFFECTS OF DROUGHT STRESS ON PHYSIOLOGICAL CHARACTERISTICS IN WHEAT RECOMBINANT INBRED LINES

 
 
Author(s):  SHAHBAZI HADIS, ARZANI AHMAD*, ESMAILZADEH MOGHADDAM MOHSEN
 
* SEED AND PLANT IMPROVEMENT INSTITUTE, KARAJ, IRAN
 
Abstract: 

Study of physiological responses of recombinant inbred lines (RlLs) to drought stress could help to understand the drought tolerance mechanisms. For this reason a field experiment was conducted to evaluate the effect of drought stress on chlorophyll content, leaf proline content, leaf length, leaf width, leaf area, peduncle length and plant height using 169 RILs, in two separate simple lattice design with four replications using two moisture regime of normal and water deficit stress, Irrigation regimes were performed based on Class A-pan of 70 and 130 mm evaporation from Class -A -pan and moisture content of soil in effected root depth. The RILs were obtained by crossing between a tolerant and sensitive wheat cultivar. The result of analysis of variance showed a significant difference among Rll.s. Drought stress caused a decrease in the chlorophyll content, leaf width, leaf length, peduncle length, leaf area but an increase in the proline content. Although drought stress increased the proline content and decreased the peduncle length and leaf area in both tolerant and sensitive line groups, these declines in tolerant lines were lower than sensitive lines. Therefore, it may be possible to use the physiological traits comprising proline amino acid content, peduncle length and leaf area as a selection tool for selecting drought tolerant lines in bread wheat.

 
Keyword(s): CHLOROPHYLL CONTENT, LEAF PROLINE CONTENT, DROUGHT STRESS, RECOMBINANT INBREED LINES, PHYSIOLOGICAL TRAITS
 
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