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Response of photosynthate distribution in potato plants to different LED spectra.
Functional Plant Biology ( IF 3 ) Pub Date : 2020-09-21 , DOI: 10.1071/fp20131
Wei He 1 , Jin Li 2 , Min Pu 3 , Zhi-Gang Xu 4 , Lijun Gan 5
Affiliation  

Although light is essential to photosynthesis, few studies have examined the effects of different LED spectra on photosynthate distribution in potato plants. Therefore, we exposed tuberising potato plants to white (W), red (R), blue (B) and green (G) LED treatments and compared tuber development and carbohydrate partitioning among the plants. R-treated plants had greater photosynthetic leaf area during tuber development compared with those under other treatments, thus enhancing assimilation. Although R-treated plants had higher 13C assimilation in the leaves, stems and roots than those under B treatment, there was no difference in partitioning of 13C assimilation and yield in the tubers of each plant between R and B treatments. For the tuber size, R-treated plants had a higher ratio of large tubers (>20 g) and a lower ratio of small (2–20 g) and medium-sized (10–20 g) tubers than those under W. B-treated plants had more medium-sized and large tubers than those under W. The reason may be that plants under R treatment distributed more assimilated 13C in their first tuber than those under other treatments. By contrast, plants under B balanced photosynthate distribution among their tubers. Leaves under G treatment had lower photosynthetic efficiency and ΦPSII than those under W, R or B treatment, which resulted in lower 13C photosynthate allocation in organs and lower tuber yield per plant than in R and B treatments. Overall, R treatment promoted 13C assimilation and led to more large tubers than other treatments. B-treated plants distributed more photosynthates into tubers rather than other organs and showed balanced tuber development.



中文翻译:

马铃薯植株中光合产物分布对不同LED光谱的响应。

尽管光对于光合作用至关重要,但是很少有研究检查不同LED光谱对马铃薯植物光合产物分布的影响。因此,我们将马铃薯块茎植物暴露于白色(W),红色(R),蓝色(B)和绿色(G)LED处理下,并比较了块茎发育和植物中碳水化合物的分配。与其他处理相比,R处理的植物在块茎发育过程中具有更大的光合叶面积,从而增强了同化作用。尽管R处理的植物的叶,茎和根中的13 C同化度高于B处理的植物,但13种的分配没有差异在R和B处理之间,每种植物的块茎中C的吸收和产量。就块茎大小而言,与W处理相比,经R处理的植物具有较大的块茎(> 20 g)比率,而较小的(2– 20 g)和中等大小(10– 20 g)块茎比率较低。处理的植物比W处理的植物具有更大的中型和大型块茎。其原因可能是,在R处理下的植物在其第一个块茎中比其他处理下的植物分配的13 C同化更多。相反,B下的植物在块茎之间平衡了光合产物的分布。与W,R或B处理相比,G处理的叶片具有较低的光合效率和ΦPSII,导致13与R和B处理相比,C光合产物在器官中的分配和每株块茎产量的降低。总体而言,R处理促进了13 C同化作用,并导致了比其他处理方法更大的块茎。经B处理的植物将更多的光合产物分配给块茎而不是其他器官,并显示出均衡的块茎发育。

更新日期:2020-09-23
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