Dry mass input into fruits can be predicted by fine root morphology of pepper cultivars exposed to varied lighting spectra
Dry mass input into fruits can be predicted by fine root morphology of pepper cultivars exposed to varied lighting spectra
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DOI：
10.15835/nbha50412930
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发表时间：
2022-12
影响因子：
1.8
通讯作者：
Lan Wang;Changwei Zhou;Yongjun Wu
中科院分区：
文献类型：
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作者：
Lan Wang;Changwei Zhou;Yongjun Wu
许多辣椒品种可以在植物工厂的人工照明下培育。需要一个易于测量的参数来快速预测辣椒品种的果实负载。以4个辣椒品种为材料，在3种不同的LED光源下进行生长和结果的比较研究。结果表明，红光（71.7%红光、13.7%绿色光、14.6%蓝光）使果实干重增加40%以上，而绿光（26.2%红光、56.4%绿色光、17.4%蓝光）不诱导结果。只有两个品种的细根形态，其特点是较小的表面积和更少的尖端数在蓝光光谱（7.8%的红光，33.7%的绿色，48.5%的蓝光）比红色LED光。3个品种的茎尖数与果实干重呈负相关，而细根直径则随果实干重的增加而增大。因此，细根尖数可作为优质或高产辣椒品种果实干物质积累的预测指标。建议工厂化栽培辣椒时，采用红光栽培，以提高果实产量。
Many pepper cultivars can be raised under artificial lighting in a plant factory. An easily measured parameter is needed to fast predict fruit loading in pepper cultivars. In this study, four pepper cultivars with contrasting manners in growth and fruiting were cultured under three light-emitting diode (LED) spectra in comparison with a sunlight control. It was found that the red-light spectrum (71.7% red-, 13.7% green-, 14.6% blue-lights) increased over 40% of dry mass in fruits, while the green-light spectrum (26.2% red-, 56.4% green-, 17.4% blue-lights) induced no fruiting compared to the control. Only two cultivars responded by fine root morphology, which was characterized as smaller surface-area and fewer tip-number in the blue-light spectrum (7.8% red-, 33.7% green-, 48.5% blue-lights) than in red LED light. Tip-number showed a negative correlation with fruit dry-mass in three cultivars, while fine root diameter increased with dry mass in fruits. In conclusion, fine root tip-number can be used as a predictor of fruit dry-mass in pepper cultivars high in fruit quality or yield. The red-colour light was recommended for raising pepper cultivars in a plant factory with the purpose of greater fruit productivity.