Variability in Phytophthora drechsleri f. sp. cajani and Effect of Temperature

ISSN: 0973-7510

E-ISSN: 2581-690X

Open Access

Variability in Phytophthora drechsleri f. sp. cajani and Effect of Temperature

Chandra Kant Singh¹, Ichini Sudhir¹, Ramesh Chand¹, Chandra Kant Singh¹, Ichini Sudhir¹, Ramesh Chand¹ , Vineeta Singh¹ and Mamta Sharma², Vineeta Singh¹ and Mamta Sharma²

¹Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221005, India.

²International Crops Research Institute for the Semi-Arid tropics, Patancheru, Hyderabad, 502324, India.

J Pure Appl Microbiol. 2017;11(2):1053-1059

https://doi.org/10.22207/JPAM.11.2.48 | © The Author(s). 2017

Received: 19/03/2017 | Accepted: 01/05/2017 | Published: 30/06/2017

Abstract

The present experiment was undertaken to study the cultural, morphological and pathological variation in six isolates of Phytophthora cajani. The isolates were collected from pigeonpea growing areas of eastern Uttar Pradesh. Isolates exhibited considerable variations in cultural characters and growth on potato dextrose agar medium. The universal ITS1 and ITS4 primers showed the difference among P. cajani isolates. There was significance influence of temperature on the growth of isolates, however isolates could not be differentiated based on the temperature. The average growth (1.69 cm²) at 30°C temperature was recorded with all the isolates followed by average growth (1.25 cm²) at 35°C temperature. The maximum radial growth (3.6 cm²) was observed at 96 h in isolate PDC015-1. The isolate PDC013-1 and PDC014-3 showed highest 47.0% plant mortality on ICP 7119 genotype. Among the isolates PDC014-3 killed 28.6% plants after 4^th day of inoculation.

Keywords

Cajanus cajan, Phytophthora Blight, Temperature, Variability.

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