Paper Information

Journal:   PLANT AND ECOSYSTEM   FALL 2010 , Volume 6 , Number 23; Page(s) 39 To 52.
 
Paper: 

THE AMOUNT OF CHLOROPHYLL A+B , EXTINCTION COEFFICIENT AND LEAF AREA INDEX AMOUNTS OF WINTER RAPESEED (BRASSICA NAPUS L.) BY BORIC ACID APPLICATION 1

 
 
Author(s):  MONEM R., PAZOUKI ALI REZA*, SHIRANIRAD AMIR HOSSEIN, HABIBI D., PAKNEJAD FARZAD, MOHIMANI M.
 
* ISLAMIC AZAD UNIVERSITY SHAHR-E-REY BRANCH AND YOUNG RESEARCHERS CLUB
 
Abstract: 

The study chlorophyl a+b amount and extinction coefficient are very important elements of photosynthesis amount and efficiency. In order to study the Effect of Boric acid spraying levels on chlorophyll a+b content and extinction coefficient of winter rapeseed (Brassica napus L.) cultivars an experiment carried out in factorial design in the basis of randomized complete blocks with 4 replications in 2007. Bor spraying treatments from Boric acid source in three levels: 0 , 1.5/1000 and 3.0/1000 and Rapeseed cultivars in 3 levels : Licord, Modena and SLM046 were considered. The Results showed that simple effect of cultivars , bor spraying element and interaction effect of them on chlorophyll a+b content and extinction coefficient had significant difference. In this case Licord cultivar with 6.62 mg/lit produced maximum amount of chlorophyll a+b content and with 0.46 highest amounts of extinction coefficient and SLM046 cultivar with 5.54 mg/lit and 0.34 showed the lowest amounts of chlorophyll a+b content and extinction coefficient in three average bor spraying amounts alternatively.
The effect of bor element spraying amounts on mentioned characters showed that 1.5/1000 and 3/1000 Bor spraying with 6.54 and 6.51 mg/lit had the highest amounts of chlorophyll a+b content and with 0.46 and 0.41 produced minimum amounts of extinction coefficient.
The interaction effect of experimental factor on mentioned characters showed that, 3/1000 bor spraying in Licord with 7.25 mg/lit and 0.52 gained the highest amount of chlorophyll a+b and extinction coefficient.

 
Keyword(s): BORIC ACID, CHLOROPHYLL A+B, EXTINCTION COEFFICIENT, LEAF AREA INDEX, RAPESEED, SPRAYING
 
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