Evaluation of drought stress effect on some germination and vigour traits of four soybeans commercial Cultivars seed produced under low irrigation conditions by standard germination test
Subject Areas : Crop Production ResearchZahra Sadat Hosseini Tehrani 1 , Aydin Hamidi 2 , Jahanfar Daneshian 3
1 - Karaj Uni
2 - spcri, iran
3 - Karaj
Keywords: Drought stress, Germinability, Low irrigation, Seed vigour, Soybean ,
Abstract :
In order to evaluation effects of drought stress on some seed germination and vigour of soybean commercial cultivars under low irrigation stress in Seed and Plant Improvement Institute (SPII) research field, an experiment was conducted as factorial based on randomized completely blocks design by 4 replications at seed analysis laboratory of Seed and Plant Certification and Registration Institute (SPCRI) in Karaj. Treatments was include 4 levels of drought stress in laboratory stress with Poly Etilen Glycol 6000, in potential of 0,-3,-6,-9 MPa, 3 levels of low irrigation stress on seeds mother plant that produced from parent plant irrigation of plants after 50 (normal irrigation), 100 (medium stress), 150 (severe stress) mm evaporation from pan class A, 4 soybean commercial cultivars Williams، Hamilton & Esex,TMS, Boutny.Studied traits including: Percentage (FGP), normal seedlings percent, abnormal seedlings percent, decay seeds percent, hard seeds percent, mean Germination time (MTG), mean daily germination (MDG), seedling length, seedling length and weight indices. Results showed that interaction of Low irrigation, drought stress, cultivar had significantly effects on all studied traits. Under -9 MPa drought stress in laboratory and normal irrigation of seeds that produced from parent plant in Williams as compared with no drought stress in laboratory and normal irrigation of seed that produced from mother plant MTG 0.90 days, percentage of decay seeds, hard seeds, abnormal seed respectively 0.18, 5.750, 0.60 have increased and MDG 1.28 days, percentage of FGP, normal seeds respectively 1.28 and 4.92 have decreased. Also the results showed that Williams and Boutny are respectively the best and the worst cultivars under drought stress in laboratory.