Evaluation of drought resilience of two Kurdish rice genotypes induced by polyethylene glycol (PEG-8000) at the early growth stage
DOI:
https://doi.org/10.25081/jaa.2025.v11.9603Keywords:
Resilience, PEG, Rice, Seed vigor, RWC, ProlineAbstract
Drought is being regarded as a serious threat to the growth and production of sensitive crops like rice. Selecting of tolerant genotypes and pre- sawing treatments were aimed in the study. To find out the efficiency of seed priming to mitigate drought stress effects of two rice genotypes; Se-mahee (G1) and Shesh-mahee (G2) and their resilience capacity. Three primming methods: hydropriming (P0), osmo-priming with 50 g/L PEG-8000 (P1), and osmo-priming with 100 g/L PEG-8000 (P2) later on germinated under drought stress simulated with two osmotic potentials, -0.79 (D1) and -1.58 bars (D2). The highest germination percentage (G%) was recorded due hydro and 50 g/L PEG-8000 under control condition. The growth characters of seedlings; plumule and radicle lengths and their dry weights, as well as their vigor were significantly improved under moderate drought stress due to their previous hydropriming and 5% PEG. Thus, hydropriming and osmo-priming regarded as the best preconditions of seeds to stimulate drought tolerance. Se-mahee had superior resilience in the mean of having higher seedling vigor and root: shoot ratios under drought stress. The findings of the study could underscore the crucial role of seed priming for stress management strategy for enhancing crop resilience under water shortage conditions. As well as the reduced performance of Shesh-mahee under severe drought (-1.58 bars) compared to Se-mahee could suggest the higher resilience and adaptation of the genotype under drought stress conditions.
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