Over two growing seasons, a chloroplast localized synthetic glycolate metabolic pathway expressed in potato, enhanced tuber biomass. We confirmed that this yield benefit did not come at the cost of tuber quality. In 2022, after two early season natural heatwaves, we observed enhanced daily carbon assimilation rates and increased photosynthetic capacity, with transformed plants having up to 23% higher Vcmax and 13% higher Jmax during tuber bulking stages, indicating that transformed plants were better able to withstand growing season heatwaves than untransformed controls. The increases in photosynthetic capacity and potato tuber mass after early season heatwaves were greater than in seasons without heatwaves and present the AP3 pathway as a promising avenue for yield increases in the face of forecast increased intensity and duration of heatwave events as a result of global warming.

中文翻译：

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短切光呼吸保护马铃薯光合作用和块茎产量免受热浪胁迫


在两个生长季节中，马铃薯中表达的叶绿体定位合成乙醇酸酯代谢途径提高了块茎生物量。我们证实，这种产量优势并不是以牺牲块茎质量为代价的。2022 年，在两次早期的自然热浪之后，我们观察到日碳同化率提高和光合作用能力增加，转化植物在块茎膨大阶段的 Vcmax 高出 23%，Jmax 高出 13%，这表明转化植物比未转化的植物更能承受生长季节的热浪。早季热浪后光合能力和马铃薯块茎质量的增加大于没有热浪的季节，并且面对全球变暖导致热浪事件的强度和持续时间增加，AP3 途径是提高产量的有前途的途径。