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Paper Information

Journal:   JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)   WINTER 2007 , Volume 16 , Number 62/1 (BIOLOGY ISSUE); Page(s) 1 To 11.
 
Paper: 

THE EFFECT OF DROUGHT AND EXOGENOUS ABSCISIC ACID ON THE ONTOGENY OF OILSEED RAPE (BRASSICA NAPUS L.)

 
 
Author(s):  MAJD A.*, JAFARIEH YAZDI E., FALAHIAN F.A., KHAVARINEZHAD RAMEZAN ALI, BERNARD F., JAVIDFAR F.
 
* BIOLOGY DEPARTMENT, TEACHER TRAINING UNIVERSITY OF TEHRAN
 
Abstract: 

The effect of drought stress and exogenous abscisic acid on the ontogeny of vegetative and reproductive organs of Brassica napus L. was studied. Treatments were: irrigated plants without exogenous abscisic acid, droughted without exogenous abscisic acid and with 3 different concentrations (5, 10 and 15 mgr-1) of abscisic acid. The experiment was designed in a randomized complete blocks with 3 replications. Samples of shoots, leaves, buds, flowers and siliques were fixed according to the common cyto-histological methods and studied. Frequency of stomata was determined in 1mm2 of leaf area. Shoots and leaves of plants under drought stress plus higher concentrations of abscisic acid showed higher level of lignifications, reduction in cortex diameter and dehydratation of some of the parenchyma cells. The frequency of stomata tended to reduce. In this study, premature ovules and embryos observed in plants under drought stress and exogenous abscisic acid.

 
Keyword(s): DROUGHT, ABSCISIC ACID, ONTOGENY, BRASSICA NAPUS L.
 
References: 
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