article · Agronomy
Temperature fluctuations can severely harm crop development. This research evaluated how seed priming treatments influence the performance of Camelina sativa when exposed to high temperatures. The experiment compared unprimed seeds, hydropriming with distilled water, and osmopriming using thiourea at 500 parts per million across two camelina varieties, 7126 and 8046, under normal conditions of 20 degrees Celsius and heat stress at 32 degrees Celsius. Heat stress notably reduced plant growth, lowering relative water content and photosynthetic rates in both varieties. Applying thiourea osmopriming enhanced root length, shoot length, and biomass production under heat stress, alongside improving water relations and gas exchange. These physiological improvements helped maintain plant productivity, increasing seed yields by 12 percent in variety 7126 and 15 percent in variety 8046 under stress conditions.
Rising temperatures present a serious challenge to agricultural productivity by damaging plant growth and seed yield. Demonstrating that a simple seed treatment using thiourea protects camelina crops from heat stress offers a practical method to safeguard harvests and enhance physiological resilience in warmer growing environments.
The findings point to an applied agronomic treatment suitable for seed companies, input suppliers, and camelina growers looking to protect yields in heat-prone regions. Because thiourea was tested directly at a specific concentration on established crop varieties with positive yield outcomes, the intervention represents applied research that could be adapted for field trials and commercial seed treatment formulations.
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Temperature is a key factor influencing plant growth and productivity; however, temperature fluctuations can cause detrimental effects on crop growth. This study aimed to assess the effect of seed priming on Camelina sativa L. under heat stress. Experimental treatments were comprised of; seed priming including, no-priming, hydropriming (distilled water priming), and osmopriming (thiourea applications at 500 ppm), heat stress (control = 20 °C and heat stress = 32 °C), and camelina varieties (7126 and 8046). Heat stress hammered crop growth as relative water content and photosynthetic rate were reduced by 35.9% and 49.05% in 7126, respectively, and 25.6% and 41.2% in 8046 as compared with control-no thiourea applied. However, osmopriming with thiourea improved the root and shoot length, and biomass production compared to control–no application under heat stress, with more improvement in variety 8046 as compared with 7126. Moreover, the maximum values of gas exchange and water relations were recorded at thiourea priming and no stress as compared with no-priming under heat stress that helped to improve seed yield by 12% in 7126 and 15% in 8046, respectively. Among the varieties, camelina variety 8046 showed better performance than 7126 by producing higher seed yield especially when subjected to thiourea priming. In conclusion, thiourea seed priming helped the plants to mitigate the adverse effects of heat stress by upregulating plant physiological attributes that lead to maintain camelina seed yield.
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DOI: 10.3390/agronomy11091875
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