Biochemical basis of bacterial leaf streak resistance in maize

Authors

  • MANMOHAN DHKAL, MANDEEP SINGH HUNJAN*, HARLEEN KAUR and RAJWINDER KAUR

Keywords:

Acidovorax avenae subsp. avenae, antioxidant enzyme activity, bacterial leaf streak, maize

Abstract

Bacterial leaf streak is an emerging disease of maize (Zea mays L.), an important cereal crop grown in north India. The present research investigates the potential role of four antioxidant enzymes in imparting resistance against Acidovorax avenae subsp. avenae in six inbreds/hybrids of maize viz. G-5414, PMH-1, CM-139, LM-13, CM-600 and CML-25. Antioxidant enzyme activity was estimated spectrophotometrically from the leaf samples collected at 0, 24, 48, 72, 96, 120, 144 hours after inoculation. Results indicated a spike in expression of various antioxidant enzymes following pathogen challenge with maximum spike recorded after 48 or 72 hrs post inoculation in different maize lines. Maize inbred line CML-25 showed maximum enzyme activity, whereas G-5414 showed the least. Significantly high values of Pearson’s correlation coefficient were obtained between antioxidant enzyme activity and lesion length development suggesting possible involvement of these enzymes in imparting disease resistance against bacterial leaf streak in maize.

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Published

2016-12-24

Issue

Vol. 69 No. 4 (2016): Indian Phytopathology

Section

Research Articles

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How to Cite

HARLEEN KAUR and RAJWINDER KAUR, M. D. M. S. H. (2016). Biochemical basis of bacterial leaf streak resistance in maize. Indian Phytopathology, 69(4), 373-380. http://epubs.icar.org.in/ejournal/index.php/IPPJ/article/view/66246