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Paper Information

Journal:   JOURNAL OF DEVELOPMENTAL BIOLOGY   WINTER 2009 , Volume 1 , Number 1; Page(s) 41 To 48.
 
Paper: 

AIR POLLUTIONS EFFECTS ON ANATOMICAL STRUCTURE OF ENGLISH IVY (HEDERA HELIX. L)

 
 
Author(s):  MIRZAYI MASOOME, BABALOO FATEMEH*
 
* BIOLOGY DEPARTMENT OF ISLAMIC AZAD UNIVERSITY, TEHRAN, NORTH BRANCH
 
Abstract: 

In this study anatomical structure of organogenic and vegetative organ ofHedera helix.L was studied by the use of common methods of cello histology and optic microscopy.
Hedera helix.L has epidermis in its stem and beneath it collenchyma layer is located to improve the plants fortification; which has 7 vascular bundles consist of wood vessels and phloemes and some fibers around them.
Around the fibers secretary ducts of the plants are located.
To study the impacts of air pollution, the plants were collected from 9 different regions of Tehran which they had stations to measure the air pollution. Then we have made some sections of all the samples and the histology studies were done. Because of the impacts of air pollution on the stem, leaf blade and petiole these tissues were studied.
Studies over 4 stations of Fatemi, Bazzar, Mehrabad and Jeophisic which were the most polluted stations shows that the numbers of vascular bundles were usually the same but the width of the vessels specially the wood vessels has been increased and the amount of fiber specially in the stem was increased either.
In addition of the stem structure, in the leaf structure we have also saw the increase in the number and width of wood vessels especially in the mid-rib of the leaf. It seems that the most effective air pollution role belongs to Nitrogen oxidants.

 
Keyword(s): HEDERA HELIX. L, AIR POLLUTIONS, FIBERS, XYLEM
 
References: 
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