Chickpea crops are often exposed to a combination of drought, heat and salinity stresses during the reproductive stage. Previous efforts have largely focused on these stresses in isolation, such that we do not understand whether genotypes tolerant to one stress can withstand other stresses. Around 22–44 chickpea genotypes contrasting for tolerance to drought, salinity or heat in previous studies were exposed to terminal drought (TD, 3 experiments) and to salinity (SAL, 1 experiment). A priori stress tolerance to any of the listed stresses was generally reflected in drought and salinity tolerance in the present study. Thus, the drought‐, heat‐ and salt‐tolerant groups (DT, HT and ST) produced higher seed yield, had earlier phenology, higher harvest indices and seed yield transpiration efficiencies compared with sensitive groups (DS, HS and SS). However, tolerance did not select for prescriptive water use patterns. Despite our efforts to remove the confounding effects of phenology, 4–9 days variation in flowering time made a significant difference in productivity and differentiated tolerant from sensitive counterparts. In TD1, TD2 and SAL, all tolerant groups yielded similarly under stress conditions. This showed the existence of cross‐tolerance in chickpea where tolerant genotype selected for an individual stress can yield well under other stresses too.

中文翻译：

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鹰嘴豆（Cicer arietinum L.）对干旱，高温和盐分胁迫的交叉耐受

鹰嘴豆农作物在繁殖期经常遭受干旱，高温和盐分胁迫的共同作用。先前的努力主要集中在孤立地应对这些压力，因此我们不了解耐受一种压力的基因型是否可以承受其他压力。在先前的研究中，大约22-44个鹰嘴豆基因型与干旱，盐分或热的耐受性形成对比，它们分别暴露于终末干旱（TD，3个实验）和盐分（SAL，1个实验）。对任何列出的胁迫的先验胁迫耐受性通常反映在本研究中的干旱和盐分耐受性中。因此，与敏感组（DS，HS和SS）相比，干旱，耐热和耐盐组（DT，HT和ST）产生更高的种子产量，更早的物候，更高的收获指数和更高的种子蒸腾效率。但是，对于规定的用水模式，没有选择公差。尽管我们努力消除物候方面的混杂影响，但开花时间的4-9天变化却使生产力产生了显着差异，并且对敏感品种的耐受性有所不同。在TD1，TD2和SAL中，所有耐性组在胁迫条件下的产量相似。这表明鹰嘴豆中存在交叉耐受，其中针对单个胁迫选择的耐受基因型在其他胁迫下也能很好地产生。在压力条件下，所有耐受性群体的产量相似。这表明鹰嘴豆中存在交叉耐受，其中针对单个胁迫选择的耐受基因型在其他胁迫下也能很好地产生。在压力条件下，所有耐受性群体的产量相似。这表明鹰嘴豆中存在交叉耐受，其中针对单个胁迫选择的耐受基因型在其他胁迫下也能很好地产生。