Selecting Drought Resistant Sweet Corn Cultivars Based on Germination Percentage and Seedling Proline Content under Osmotic Potentials Stress


   Ali Shahriari1,3*,
Adam B Puteh1, Ghizan B Saleh1, Anuar B Abdul Rahim2 1- Department of
Crop Science, Faculty of Agriculture, University Putra Malaysia, Selangor,
Malaysia 2- Department of
Land Management, Faculty of Agriculture, University Putra Malaysia, Selangor,
Malaysia 3- Agriculture
and Natural Resources Researches Center of Hormozgan, Bandar Abbas, Iran     [1]
Corresponding Author Email:   Received: 10
March 2013 Accepted:12
November 2013   Abstract Water stress can
affect germination by decreasing the percentage of germination. A study was
undertaken to evaluate the influence of different osmotic potentials (MPa) on
proline content and percentage seed germination of corn. The experiment was
conducted in factorial with a randomized complete block design (RCBD) with
three replications. Seeds of two open pollinated varieties (Masmadu and Thai
super sweet) and three Hybrids (968,969 and 926) sweet corn were germinated at
0, -0.2, -0.5, -0.7, -1.2 and -1.4 MPa osmotic potentials. Results showed the
percentage of germination and coefficient of velocity decreased with decrease
in osmotic potential while proline content and mean germination time increased.
Polyethylene glycol increased root length and length per volume at low osmotic
potential (-0.2 MPa) but decreased at more than -0.7 MPa. Seedling proline
content appears not to be related to percentage germination but appears to be
related to the decline in osmotic potential in germination media. Seed
germination test at -0.7 to -1.2 MPa has the potential to be used as a vigor
test in sweet corn.