In-vitro Screening of Tomato Genotypes for Drought Tolerance
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Author:R. Sivakumar, D. Durga Devi and C.N. Chandraseka
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:101, Issue:oct-dec
DOI: https://doi.org/10.29321/MAJ.10.001217
Abstract
A study was carried out to assess the drought tolerance ability of 32 tomato genotypes using
PEG - 6000 induced moisture stress, on the basis of seedling parameters such as germination
percentage, root length, shoot length, seedling dry weight and vigour index. In vitro screening
revealed that seedling characters were reduced significantly at -0.2 MPa compared to control.
Among the genotypes LE 18, LE 57, LE 27, LE 13 and LE 118 performed better under stress in
terms of germination percentage, root length, shoot length, seedling dry weight and vigour
index. Many of the genotypes did not germinate at -0.35 MPa. Varieties like CO 3, PKM 1, TNAU
TH CO 3 and COTH 2 showed poor performance in terms of germination percentage, root and
shoot length. This result can be used for pot and field level screening and manipulations in
tomato cultivars for improvement of drought tolerance.
Key words : Drought tolerance, PEG – 6000, Tomato, Germination, Vigour index.