Vol. 12, Issue 5 (2023)

Author(s):
Anita Kumari Ujjwal, Nangki Tagi, DK Nayak and Sachin Gangwar

Abstract:
Proline metabolism has complex roles in a variety of biological processes, including cell signaling, stress protection, and energy production. Plant-derived phenolic compounds contribute to the defense against various pathogens, including plant parasitic nematodes. To investigate the role of proline and phenols in resistant and susceptible varieties of chilli against Meloidogyne incognita the fifteen days old chilli plants were inoculated with 1000 second stage juveniles of root knot nematode, Meloidogyne incognita and maintained under net house condition. Investigations were made to find out the effect of Meloidogyne incognita on the biometric traits and biochemical traits determining chlorophyll content, sugar content, starch content, phenol content, proline content, macro and micronutrient status of chilli crop. Studies on total phenol in roots and shoots of root-knot susceptible and resistant chilli varieties revealed significantly higher level in roots and shoots of moderately resistant variety Debgarh Local as compared to highly susceptible variety Ghatikya. In Debgarh Local phenolic content was increased up to 68.71% in shoot part and 50.13% in root part. Ghatikya variety was shown lower rate of increase in phenolic content as 22.27% in shoots and 18.25% in roots. The shoots of the tested chilli varieties exhibit comparatively less proline content, whereas the roots exhibit higher levels. Debgarh Local was shown maximum increase in proline content with 32.05% in roots and 29.46% in shoots and Ghatikya was shown minimum increase rate in proline content with 24.24% in roots and 16.66% in shoots.