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Effect of Root-Knot Nematode, Meloidogyne graminicola on the Nutrients and Heavy Metal Uptake and Growth of Rice, Oryza sativa

KrishiKosh

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Title Effect of Root-Knot Nematode, Meloidogyne graminicola on the Nutrients and Heavy Metal Uptake and Growth of Rice, Oryza sativa
Ph.D.
 
Creator M. Venkatesan
 
Contributor Gaur, H. S.
 
Subject planting, rice, vegetative propagation, biological phenomena, biological interaction, meloidogyne graminicola, biological development, land resources, nutrients, concentrates
 
Description Investigations have been carried out on the effect of the root-knot nematode,
Meloidogyne graminicola, a serious pest of rice, on the content of the major plant
nutrients, viz., Nitrogen (N), Phosphorus (P) and Potassium (K) and the heavy metal,
Arsenic (As), Lead (Pb) and Cadmium (Cd) and growth of the basmati rice, Oryza
sativa, cv. Pusa 1121. The results show that the content of N, P and K in rice shoot
were significantly reduced and were negatively correlated to the nematode inoculum
level. The content of NPK after 45 and 110 days of transplanting was significantly
lower in the shoot of rice inoculated with 2 and 8 J2 cm-3 soil compared to nematodefree
plants, the reduction being more at the higher inoculum level. The plant height
and shoot and root dry weights were also decreased with increasing nematode
inoculum level. A field trial was also carried out at two sites at the IARI farm which
received the waste water from city drains having high levels of Arsenic and Lead.
The heavy metal Arsenic uptake by plants was positively correlated to the nematode
infestation level. Similar trend was also seen in Lead (Pb) uptake by root. The heavy
metals, As and Pb concentration in rice generally followed a pattern of root > shoot >
grains. The plant height, shoot dry weight and root dry weight showed strong
negative correlation to the nematode infestation level. Root-knot indices were
significantly increased at high inoculum levels. The results have revealed differences
in the uptake of plant nutrients versus heavy metals from soil infested with root-knot
nematode, M. graminicola infecting rice roots. The results have indicated to possible
increased health hazards to consumers besides the crop losses due to reduction in the
quantity, product quality and nutritional values if plant parasitic nematodes are not
managed.
 
Date 2016-03-09T14:17:27Z
2016-03-09T14:17:27Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/65002
 
Language en_US
 
Format application/pdf
 
Publisher IARI, DIVISION OF NEMATOLOGY,NEW DELHI