Paper Information

Journal:   JOURNAL OF PLANT PROCESS AND FUNCTION   SUMMER 2016 , Volume 5 , Number 16; Page(s) 165 To 179.
 
Paper: 

THE EFFECT OF SPRAYING AUXINE AND CYTOKININE HORMONES ON PHOTOSYNTHETIC PIGMENTS AND LEAF PROLINE AMINO ACID IN MAIZE HYBRID 704 UNDER DROUGHT STRESS CONDITION

 
 
Author(s):  MAHROKH ALI, NABIPOUR MAJID*, ROSHANFEKR DEZFULI HABIB ALAH, CHOUKAN RAJAB
 
* DEPARTMENT OF AGRONOMY, FACULTY OF AGRICULTURE, SHAHID CHAMRAN UNIVERSITY, AHVAZ, IRAN
 
Abstract: 

This study was conducted to determine some physiological parameters of maize cultivar KSC 704 affected auxin and cytokinin hormones concentration variations under drought stress condition. The experiment was carried out in three environments separately including nondrought stress environment, drought stress in vegetative stage and drought stress in reproductive stage. Cytokinin hormone in three concentrations (control, 50 and 100 mg/lit) in V8-V10 stage and auxin hormone in three concentrations (control, 10 and 20 mg/lit) in silk emergence stage was laid out as a factorial design based on randomized complete block with three replications in each environment at Seed and Plant Improvement Institute, Karaj in 2014. Drought stress in reproductive stage decreased chlorophyll a and b respectively %28.13 and %37.93. The use of cytokinine hormone in concentration 50 mg/lit increased %37.73 chlorophyll a and decreased % 16.58 proline amino acid and also auxine hormone in concentration 10 and 20 mg/lit increased %22.78 chlorophyll a and decreased %18.02 proline. The results of this experiment show that, probably the best concentration of cytokinine and auxine hormones are 50 and 20 mg/lit respectively for increasing tolerance to drought stress because the proline was produced in minimum level with average 92.08 m mol /gr in this condition.

 
Keyword(s): CAROTENOIDS, CHLOROPHYLL A, CHLOROPHYLL B, REPRODUCTIVE STAGE, VEGETATIVE STAGE
 
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