Document Details

Document Type : Article In Journal 
Document Title :
Relationships of External Osmotic Potentials with Water Saturation Deficit and Some N Compounds inTwo Maize Cultivars
علاقة الجهد الاسموزي الخارجي بعجز الامتلاء وبعض مركبات النيتروجين في صنفين من الذرة
 
Subject : Botany 
Document Language : English 
Abstract : The percentage water saturation deficit (WSD) and the content of nitrogenous compounds free amino acids, proline and soluble proteins were studied in two Egyptian cultivars (Composite 5 and Giza 2) of maize (Zea mays, L) under varying osmotic potentials (0, -I, -2, -4, -6, -8 and -10 MPa) and varying times (from 1 to 7 days of exposure to 0.0, -2.02 and -4.04 MPa osmotic potentials. The obtained relationships were linear and showed significantly different rates of increase in WSD of the two cultivars with the decrease in external water potential or increase in time of stress. Composite 5 cultivar exhibited greater WSD than Giza 2, and the two cultivars showed dissimilar rates of daily increase in WSD under osmotic stress. Free amino acids, proline and soluble proteins accumulated but with greater rates from 0.0 to -2.02 than under from -2.02 to -4.04 MPa in both cultivars. Free proline and amino acids continued to accumulate with time of stress. Proteins accumulation was inhibited after the third day of stress. Proline and amino acids accumulated by greater rates with the increase in WSD in Giza 2. The increase in proline was by about 15 and 8 mg/g D. wt. per MPa decrease in osmotic potential in Composite 5 and Giza 2 cultivar respectively. 
ISSN : 1012-1319 
Journal Name : Science Journal 
Volume : 8 
Issue Number : 1 
Publishing Year : 1416 AH
1996 AD 
Number Of Pages : 13 
Article Type : Article 
Added Date : Sunday, October 11, 2009 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
محمود ابو اليزيد عبدالحق M. A. ELHAAKResearcher  
حميدة احمد السيدH. A. EL-SAYEDResearcher  

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