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.

中文翻译：

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用巯基硫脲引发种子在热应激条件下提高了亚麻荠的性能

温度是影响植物生长和生产力的关键因素；然而，温度波动会对作物生长造成不利影响。本研究旨在评估种子引发对亚麻荠的影响L. 在热应力下。实验治疗包括：种子引物包括无引物、水引物（蒸馏水引物）和渗透引物（硫脲应用 500 ppm）、热应激（控制 = 20 °C 和热应激 = 32 °C）和亚麻荠品种（7126 和 8046） . 与未施用硫脲的对照相比，7126 的相对含水量和光合速率分别降低了 35.9% 和 49.05%，8046 的相对水分含量和光合速率分别降低了 25.6% 和 41.2%，因此热应激影响了作物的生长。然而，与未在热胁迫下施用的对照相比，使用硫脲进行渗透引发提高了根和芽的长度以及生物量产量，与 7126 相比，品种 8046 的改进更多。 此外，与热胁迫下不引发相比，在硫脲引发和无胁迫下记录了气体交换和水分关系的最大值，这有助于将 7126 的种子产量分别提高 12% 和 8046 的 15%。在这些品种中，山茶品种 8046 表现出比 7126 更好的性能，尤其是在硫脲引发时产生更高的种子产量。总之，硫脲种子引发通过上调植物生理特性，从而维持茶荠种子产量，帮助植物减轻热应激的不利影响。