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Dehydration survival of crop plants and its measurement

机译：作物植物的脱水存活及其测量

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Dehydration survival under drought stress is defined in this review as the transition from plant activity into a quiescent state of life preservation, which will be terminated by either recovery or death, depending on the stress regime and the plant's resilience. Dehydration survival is a popular phenotype by which functional genomics attempts to test gene function in drought resistance and survival. The available reports on phenotyping and genotyping of dehydration survival in genomic studies indicate that the measurement of this trait is often biased to the extent that misguided interpretations are likely to occur. This review briefly discusses the physiological basis of dehydration survival in resurrection plants and crop plants, and concludes that in phenotyping dehydration survival there is a need to distinguish between dehydration avoidance and dehydration tolerance (also termed desiccation tolerance) in affecting survival and recovery. Without this distinction, functional genomics studies of the trait might be biased. Survival due to dehydration avoidance is expressed by the capacity to maintain a relatively high plant water status as the plant is desiccated. Survival due to dehydration tolerance is expressed by delayed mortality (mortality at a relatively low plant water status) as affected by the resilience of plant metabolism. The common test of dehydration survival, using the relative recovery after a given number of stress days, is therefore insufficient because it is mainly driven by dehydration avoidance and so ignores a possible role for dehydration tolerance. Conceivable methods for more accurate phenotyping of the two components of dehydration survival are proposed and discussed.
机译：在本综述中定义干旱胁迫下的脱水存活作为从植物活性转变为静终生命保存的静态状态，这将通过恢复或死亡来终止，这取决于压力制度和植物的弹性。脱水存活是一种流行的表型，功能基因组学试图在抗旱和存活中测试基因功能。基因组研究中脱水存活的表型和基因分型的可用报告表明，这种特性的测量通常偏向于可能发生误导解释的程度。本综述简要介绍了复活植物和作物植物中脱水存活的生理基础，并得出结论，在表型脱水存活中，需要区分脱水避免和脱水耐受（也称之为干燥耐受性）在影响存活率和恢复方面。如果没有这种区分，特征的功能基因组学研究可能会偏见。由于脱水避免的生存是通过维持植物被干燥的容量保持相对高的植物水质的能力来表达。由于促进植物代谢的恢复而受到延迟死亡率（相对较低的植物水位的死亡率），表达了脱水耐受性的存活。因此，使用给定数量的应力天后的相对恢复的脱水存活的常见试验是不充分的，因为它主要由脱水避免驱动，因此忽略了脱水耐受的可能作用。提出并讨论了对脱水存活的两种成分的更准确表型的可想到的方法。

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