Abiotic stress tolerance in plants is said to be induced by pre‐stress events (priming) during the vegetative phase. We aimed to test whether drought priming could improve the heat and drought tolerance in wheat cultivars. Two wheat cultivars “Gladius” and “Paragon” were grown in a fully controlled gravimetric platform and subjected to either no stress or two drought cycles during the tillering stage. At anthesis, both batches were either subjected to high temperature stress, drought stress or kept as control. No alleviation of grain yield reduction due to priming was observed. Higher CO₂ assimilation rates were achieved due to priming under drought stress. Yield results showed that priming was not damage cumulative to wheat. Priming was responsible to alleviated biochemical photosynthetic limitations under drought stress and sustained photochemical utilization under heat stress in “Paragon.” Priming as a strategy in abiotic stress alleviation was better evidenced in the stress susceptible cultivar “Paragon” than tolerant cultivar “Gladius”; therefore, the type of response to priming appears to be cultivar dependable, and thus phenotypical variation should be expected when studying the effects of abiotic priming.

中文翻译：

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干旱引发对减轻小麦品种（Triticum aestivum L.）光合限制的作用，与非生物胁迫的耐受性相反

据说植物的非生物胁迫耐受性是由营养期的预应力事件（启动）诱导的。我们旨在测试干旱引发是否可以提高小麦品种的耐热和耐旱性。两个小麦品种“ Gladius”和“ Paragon”在完全控制的重量分析平台上生长，在分ing期没有任何压力或经历了两次干旱周期。在开花期，两个批次都经受高温胁迫，干旱胁迫或保持为对照。没有观察到由于底涂而减轻了谷物产量的减少。较高的CO ₂由于干旱胁迫下的启动，同化率得以实现。产量结果表明，引发对小麦的累积累积没有损害。在“ Paragon”中，引物负责缓解干旱胁迫下的生化光合限制，并缓解热胁迫下的持续光化学利用。在对胁迫敏感的品种“ Paragon”中，比对耐性品种“ Gladius”更好地证明了作为非生物胁迫缓解策略的启动。因此，对引发的反应类型似乎是可信赖的品种，因此在研究非生物引发的作用时应预期表型变异。