The effect of polyethylene glycol induced drought stress on seed germination stage and seedling growth of different soybean varieties
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Abstract
The results showed that the interaction between varietal treatment and osmotic potential significantly affected growth percentage, root length, shoot length, fresh root weight, dry root weight, fresh shoot weight, dry shoot weight, root shoot ratio, and chlorophyll index (SPAD value) both at the stage of seed germination and seedling growth. Induction of potential osmotic -0.19 MPa reduced the growth percentage by 21.93% and 33.99%, 32.04% and 41.66% at root length, and by 41.66% and 36.77% at shoot length both at seed germination and seedling growth stages, respectively. Meanwhile, the potential osmotic induction of -0.67 MPa reduced the growth percentage by 39.75% and 52.81%, by 51.68% and 61.32% in root length, and by 61.82% and 55.95% on shoot length at both seed germination and seedling growth respectively. Gepak Kuning Variety has a better tolerance for osmotic potential than the other four varieties. It can conclude that Gepak Kuning variety could be used as breeding material to develop drought-resistant soybean varieties.
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