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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(9): 2736-2742
DOI: https://doi.org/10.20546/ijcmas.2018.709.340


Impact on Physiological Parameters upon PRSV Infection in Different Genotypes of Carica papaya L. and Vasconcellea species
Linta Vincent1, K. Soorianathasundaram2, M.R. Dinesh3 and K.S. Shivashankara4
1Division of Fruit Crops, ICAR-IIHR, Bangalore, Karnataka, India
2Department of Fruit Crops, HC&RI, TNAU, Coimbatore, Tamil Nadu, India
3ICAR-IIHR, Bangalore, Karnataka, India
4Division of Plant Physiology and Biochemistry, ICAR-IIHR, Bangalore, Karnataka, India
*Corresponding author
Abstract:

Papaya is major tropical fruit gaining importance throughout the tropics and subtropics but there is a severe restriction in its production due to the serious disease known as Papaya Ring Spot Virus (PRSV-P). No papaya variety till date was identified as having durable resistance to PRSV-P; whereas several species of Vasconcellea, a close relative of papaya was reported to have heritable resistance to Papaya Ring Spot Virus. To understand these changes in physiological parameters upon PRSV infection this study was carried out by involving six Carica papaya varieties, two intergeneric hybrids of Carica papaya and Vasconcellea cauliflora and three Vasconcellea species. The physiological parameters viz., photosynthetic rate (PN), stomatal conductance (gs) and transpiration rate (E) were measured before inoculation, and subsequently 7 days post inoculation (7 dpi) with PRSV, 14 dpi and 30 dpi. The results revealed that the photosynthetic rate and stomatal conductance were found get reduced in the susceptible genotypes viz., Arka Surya, Arka Prabhath, Red Lady and Pusa Dwarf at all the stages of observation, while in tolerant genotypes such as Pusa Nanha, TNAU papaya CO8, they initially decreased at 7 dpi but found to be raised at 14 dpi but again declined during the observation on 30 dpi. In IGH1 and IGH2, PN and gs were found to be increased at 7 dpi but decreased afterwards. In susceptible genotypes, transpiration rate was found to be increased continuously upto 14 dpi and reduced at 30 dpi. The physiological parameters did not show any significant alterations in the photosynthetic rate, stomatal conductance and transpiration rate in the three Vasconcellea species evaluated


Keywords: Papaya (Carica papaya L., family Caricaceae), Carica papaya and Vasconcellea cauliflora
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How to cite this article:

Linta Vincent, K. Soorianathasundaram, M.R. Dinesh and Shivashankara, K.S. 2018. Impact on Physiological Parameters upon PRSV Infection in Different Genotypes of Carica papaya L. and Vasconcellea species.Int.J.Curr.Microbiol.App.Sci. 7(9): 2736-2742. doi: https://doi.org/10.20546/ijcmas.2018.709.340