Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 23, Issue 2, 2021; Page No.(283-290)

SCREENING FOR IRON DEFICIENT CHLOROSIS (IDC) TOLERANT GENOTYPES IN POTATO (SOLANUM TUBEROSUM, L.) UNDER AEROPONIC SYSTEM

CLARISSA CHALLAM, SOM DUTT, JAGDEV SHARMA, TUSAR KANTI BAG, MUTHURAJAN RAVEENDRAN AND DURAIALAGARAJA SUDHAKAR

Abstract

A study was carried out under controlled aeroponic culture for identifying IDC tolerant potato genotypes. Micro-plantlets of 15 potato genotypes were evaluated for Fe deficiency response. Two different nutrient compositions viz., Fe-sufficient (Fe-EDTA 50 mg/l) and Fe-deficient (Fe-EDTA 0mg/l) media were supplied to the root zone by periodic spraying in fine mist to keep it saturated. Morphoo-physiological and biochemical parameters such as plant height, root length, root-shoot biomass, SPAD, chlorophyll content, peroxidase and Fe contentwere recorded for each genotype under both conditions. Genotypes were ranked by multivariate cluster analysis. IDC tolerant genotypes, viz., CP-1435, CP-3772 and CP-3443 showed less reduction in chlorophyll, SPAD values, peroxidase and leaf Fe content compared to the susceptible genotypes. This work could result in new screening technique which can be utilized in breeding programme for preliminary identification of IDC tolerant potato genotypes.