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首页> 外文期刊>Journal of Experimental Botany >Raising yield potential of wheat. II. Increasing photosynthetic capacity and efficiency
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Raising yield potential of wheat. II. Increasing photosynthetic capacity and efficiency

机译：提高小麦的单产潜力。二。增加光合能力和效率

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摘要

Past increases in yield potential of wheat have largely resulted from improvements in harvest index rather than increased biomass. Further large increases in harvest index are unlikely, but an opportunity exists for increasing productive biomass and harvestable grain. Photosynthetic capacity and efficiency are bottlenecks to raising productivity and there is strong evidence that increasing photosynthesis will increase crop yields provided that other constraints do not become limiting. Even small increases in the rate of net photosynthesis can translate into large increases in biomass and hence yield, since carbon assimilation is integrated over the entire growing season and crop canopy. This review discusses the strategies to increase photosynthesis that are being proposed by the wheat yield consortium in order to increase wheat yields. These include: selection for photosynthetic capacity and efficiency, increasing ear photosynthesis, optimizing canopy photosynthesis, introducing chloroplast CO2 pumps, increasing RuBP regeneration, improving the thermal stability of Rubisco activase, and replacing wheat Rubisco with that from other species with different kinetic properties.
机译：过去小麦单产潜力的提高很大程度上是由于收获指数的提高而不是生物量的提高。收获指数不可能进一步大幅度增加，但是存在增加生产性生物量和可收获谷物的机会。光合作用的能力和效率是提高生产力的瓶颈，并且有充分的证据表明，只要其他限制条件没有受到限制，提高光合作用将增加农作物的产量。净光合作用的哪怕是很小的增加，都可以转化为生物量的大幅度增加，因此也就意味着产量的增加，因为碳同化作用在整个生长季节和作物冠层中都得到整合。这篇综述讨论了小麦单产联盟提出的增加光合作用的策略，以增加小麦的单产。这些措施包括：选择光合作用的能力和效率，增加耳朵的光合作用，优化冠层的光合作用，引入叶绿体CO 2 泵，增加RuBP再生，改善Rubisco活化酶的热稳定性，以及用其他具有不同动力学特性的物种。

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