Evaluation of drought tolerance in new Bulgarian sweet corn genotypes with using stress tolerance indices
2015
Two inbred lines and their heterotic F1 hybrid of sweet corn (Zea mays L.
var. rugosa Bonaf.) were evaluated to assess their reaction for PEG-mediated
water stress at the seedling stage in terms of various physiological and
biochemical traits. Water potentials were: zero as control and -0.6, -0.9,
-1.2 and -1.5 MPa as treatments. Stress- determining parameters such as
proline content, malondiadehyde, and hydrogen peroxide were measured. In
water stress, the germination was inversely proportional to the Polyethylene
glycol concentrations in all three genotypes; roots and shoots length, fresh
and dry weight decreased with an increasing of polyethylene glycol
concentration. Malondiadehyde, proline, and hydrogen peroxide were found to
be increased at different osmotic gradients in comparison to control. The
data observed in the experiments revealed that the line C-6 might be used as
a very promising parent to breed and select new drought tolerant sweet corn
hybrids. Such a suggestion needs to be further explored by involving a larger
set of sweet corn lines and hybrids.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
26
References
0
Citations
NaN
KQI