Efficient screening of brinjal genotypes for bacterial wilt resistance at seedling stage: Unravelling the mechanisms through biochemical parameters

Efficient screening of brinjal genotypes for bacterial wilt resistance at seedling stage: Unravelling the mechanisms through biochemical parameters

Authors

  • Niharika Muslepally Pg student2020-11-026Dept. of Plant Breeding & geneticsCollege of AgriculturePadannakkad
  • Raji Vasudevan Namboodiri

Keywords:

Ralstonia solanacearum, Brinjal genotypes, Biochemical analysis, Disease resistan

Abstract

Brinjal genotypes were screened for resistance to bacterial wilt (BW) caused by Ralstonia solanacearum atthe seedling stage and biochemical parameters were analysed to uncover the underlying resistancemechanisms. Three-week-old seedlings of 31 brinjal genotypes including four resistant checks(RC: Ponny,Haritha, Surya and Neelima) and two susceptible checks [SC:SM-26,(S.incanum),SM-27(S.insanum)] weresubjected to a screening procedure that combined soil drenching and root dip inoculation.Based on percentagedisease incidence (PDI), two accessions SM-15 and SM-25 were rated as highly resistant(HR: 0 PDI) andaccession SM-1 was rated as resistant(R: 1-10PDI). Accessions SM-1, SM-2, SM-5, SM-11, SM-17,SM-24and KAU hybrid Neelima were rated as moderately resistant (MR: 11-20 PDI). Accessions SM-4, SM-8,SM-14 and SM-19 were rated as susceptible (S: 21-30 PDI). Moderately susceptible (MS: 31-40 PDI)accessions were SM-3, SM-32, SM-33, SM-13 and SM-16. Accessions SM-9, SM-10, SM-12, SM-18, SM-20, SM-21, SM-22, SM-23, SM-26 and SM-27 were rated as highly susceptible (HS:>40PDI). Biochemicalanalysis showed higher phenol content, Polyphenol Oxidase (PPO) activity, and total sugars in resistant andmoderately resistant groups at 12 and 24 hours post inoculation (hpi). PPO activity, phenolic and totalsugars had a strong negative correlation with disease incidence at 12 and 24 hpi.

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Published

27-07-2024

How to Cite

Niharika Muslepally, & Namboodiri, R. V. (2024). Efficient screening of brinjal genotypes for bacterial wilt resistance at seedling stage: Unravelling the mechanisms through biochemical parameters. Journal of Tropical Agriculture, 62(1), 72–80. Retrieved from https://jtropag.kau.in/index.php/ojs2/article/view/1401

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