Arbuscular mycorrhizal status and root phosphatase activities in vegetative <Emphasis Type="Italic">Carica papaya</Emphasis> L. varieties |
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Authors: | Sharda W Khade Bernard F Rodrigues Prabhat K Sharma |
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Institution: | (1) Department of Botany, Goa University, Taleigao Plateau, Panaji, 403206, Goa, India;(2) Present address: IInd Floor, Darshan Apts, Vidhyanagar Colony, Carenzalem Post, Miramar, Panaji, 403002, Goa, India |
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Abstract: | The arbuscular mycorrhizal (AM) status and root phosphatase activities were studied in four vegetative Carica papaya L. varieties viz., CO-1, CO-2, Honey Dew and Washington. Standard techniques were used to ascertain information on spore
density and species diversity of AM fungi. Although in case of estimation of root colonization and root phosphatase activities,
the existing methods were slightly modified. Root colonization and spore density of AM fungi along with root phosphatase (acid
and alkaline) activities varied significantly in four papaya varieties. The present study recorded higher acid root phosphatase
activity when compared with alkaline root phosphatase activity under P-deficient, acidic soil conditions. The present study
revealed that the root colonization of AM fungi influenced acid root phosphatase activity positively and significantly under
P-deficient, acidic soil conditions. A total of 11 species of AM fungi belonging to five genera viz., Acaulospora, Dentiscutata, Gigaspora, Glomus and Racocetra were recovered from the rhizosphere of four papaya varieties. |
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