Preliminary Identification of Local Maize Under Drought Stress By PEG-6000

Abstract

Adaptation test of local maize plants under drought stress requires early selection at the seedlings stage through Poly Ethylene Glycol (PEG-6000). This study aimed to identify local varieties of maize plants from North Sumatra under drought stress with several doses of PEG-6000. This study was conducted from July to November 2022 using a completely randomized design with two factors and three replications. The sixteen local maize (L) and a hybrid variety (H) of maize as a comparison were used as the first factor. The PEG doses were 0; 100; 200; 300; 400; and 500 g L-1 as the second factor. Data were analyzed using analysis of variance and duncan's multiple range test at P<0.05. The results showed that the LSB5 and LSB4 of local maize from Serdang Bedagai had the greatest number of seeds germinated and water content of seedlings at 40.17 seeds and 74.43%, respectively. The higher PEG dose of 500 g L-1 inhibited the number of seeds germinated and water content of local maize seedlings to 32.27 and 11.45%, respectively. The interaction of local varieties with PEG doses were insignificant effects on both characteristics of local maize.

Enhanced Antioxidant Activity and Secondary Metabolite Production in Tartary Buckwheat under Polyethylene Glycol (PEG)-Induced Drought Stress during Germination

“…The distinct clustering observed among all traits, particularly the identification of the XiNong 9943 genotype as exhibiting the highest drought tolerance. This result is consistent with prior research indicating the importance of RWC regulation, osmotic adjustment, and antioxidant defense mechanisms in conferring stress resilience [17,[65][66][67]. Overall, the integration of these analytical approaches enhances our understanding of genotypic responses to PEG-induced drought stress, elucidating key physiological and biochemical mechanisms underlying drought tolerance in Tartary buckwheat genotypes.…”

“…Drought stress reduces water potential and hampers water uptake, thereby impeding seed germination and seedling growth [13][14][15]. Polyethylene glycol (PEG)-induced drought stress is the most popular screening technique used to evaluate the drought tolerance of various crop varieties during the seed germination stage [16,17]. Determining alterations in radicle and plumule properties, including radical length, plumule length and biomass of seedlings exposed to drought stress gives significant insight regarding these traits [14,15,18].…”