B. Divya¹ , T.S. Aghora² , N. Mohan² , A. Rekha²

1. University of Horticultural Sciences, PG Center, Bengaluru-560065, India
2. Indian Institute of Horticultural Research, Bengaluru- 560 089, India
Author    Correspondence author
International Journal of Horticulture, 2014, Vol. 4, No. 11   doi: 10.5376/ijh.2014.04.0011
Received: 14 Apr., 2014    Accepted: 21 Apr., 2014    Published: 13 May, 2014

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Divya et al., 2014, Physiological Basis of Rust Resistance in French Bean (Phaseolus Vulgaris), International Journal of Horticulture, 2014, Vol.4, No.11 53-57 (doi: 10.5376/ijh.2014.04.0011)

Two resistant parents Arka Anoop and IC-525236 , three susceptible parents IIHRPB-1, IIHRPB-2 and IIHRPB-7 and six crosses IIHRPB-1×Arka Anoop, IIHRPB-2×Arka Anoop, IIHRPB-7×Arka Anoop, IIHRPB-1×IC-525236, IIHRPB-2×IC-525236 and IIHRPB-7×IC-525236 were screened for rust resistance under artificial epiphytotic conditions at Indian Institute of Horticultural Research, Bengaluru, during rabi, 2012. Studies were made on the resistant components viz., Stomata count both on upper and lower surface, Stomatal size (length and breadth), and stomatal pore size. Among the genotypes screened against rust under natural and artificial epiphytotic conditions, all the resistant parents and crosses did not show disease symptom and had less no. of stomata, small stomatal and narrow stomatal pore than all three susceptible parents which showed disease severity. The results indicated that the physiological basis of resistance, the structural features of stomata, like small stomatal pore size, narrow stoma and reduced number of stomata are highly related to impart rust resistance in french bean cultivars.

French bean; Rust resistance; Physiological basis of resistance