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CELL WALL DEGRADING ENZYMES OF Fusarium solani (Mart.) Sacc. INCITANT OF DECLINE OF Piper betle.

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Title CELL WALL DEGRADING ENZYMES OF Fusarium solani (Mart.) Sacc. INCITANT OF DECLINE OF Piper betle.
 
Creator SANTHA LAKSHMI, B
 
Contributor Balasubramanian, K.A
 
Subject Cell, wall, degrading, enzymes, Fusarium, solani,Sacc, incitant, decline, Piper, betle
 
Description The elaboration of cell wall degrading enzymes of F.
solani, incitant of betelvine decline and the role of
calcium in the reduction of elaboration of these enzymes we~e
studied in the present investigation.
The affected betelvine root sections showed brown
vascular discolouration. Fungal mycelium was also observed
in the xylem vessels. Isolations from those sections yielded
Fusarium solani incitant of betelvine decline. Of the two ·
methods i.e, dipping of intact roots and clipped roots in
spore suspension followed to prove pathogenicity, maximum
infection of the ·CUttings was observed when the plant roots
were clipped before dipping them in spore suspension.
In susceptible variety, the activity of
polygalacturonase and pectin methyl esterase was more. In
moderately resistant and resistant varieties the activity of
polygalacturonase and pectin methyl esterase was moderate and
less respectively.
The application of 5.0 tonnes of gypsum/ha to betelvine
plants the activity of polygalacturonase and pectin methyl
esterase was less. Less activity of polygalacturonase and
pectin ·methyl esterase was observed in plants fed with 2.5
tonnes of gypsum/ha compared to control plants. The activity
of polygalacturonase and pectin methyl esterase was low in
plants where water was drained compared to the plots for
which water was not drained. Pectin trans-eliminase was not
detected.
The calcium deficient plants showed more activity of
polygalacturonase and pectin methyl esterase and more
vascular browning. Calcium fed plants showed less
of po~ygalacturonase, pectin methyl esterase
vascular browning.
activity
and low
The present study confirms that the involvement of
Fusarium solani in the pathogenicity of betelvine decline
and the help rendered by polygalacturonase and pectin methyl
esterase to Fusarium solani to successfully colonize the
betelvine plants. Pectin trans-eliminase was not produced by
Fusarium solani. Calcium reduced the elaboration of
polygalacturonase and pectin methyl esterase. Magnesium
content in the soil contributed to the development of decline
disease. The polygalacturonase and pectin methyl esterase
produced the typical wilting and- vascular browning.
 
Date 2016-08-17T14:46:22Z
2016-08-17T14:46:22Z
1990
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/72802
 
Language en
 
Relation D3385;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD.