Abstract The effects of water stress on plant growth, yield, primary metabolites (sugars, organic acids, ascorbic acid) and secondary metabolites (total phenolic content, capsaicin and dihydrocapsaicin) accumulation, were evaluated for greenhouse production. A pot experiment was conducted on two species of chilies Capsicum annuum L. var 'Chili-AS Rot' and Capsicum chinense Jacq. var 'Naga Morich'. Plants were irrigated at two different treatments, optimal irrigation or field capacity and deficit irrigation or 50 % field capacity, which can be treated as drought stress. The effects of drought stress on quantity and quality of the yield, (primary and secondary metabolites) were studied. Deficit irrigation affected yield quantity, as both chili species had lower yield at deficit irrigation. Species C. chinense 'Naga Morich' under deficit irrigation abscised the flowers, thus no fruits were harvested at the third picking. Concentrations of sugars were lower at both plant species under deficit irrigation. Concentrations of organic acids in fruits of C. annuum 'Chili-AS Rot', such as citric acid, oxalic acid, fumaric acid, quinic acid were higher at optimal irrigation. Malic acid concentrations were similar at both irrigation treatments. In the fruits of C. chinense Jacq. 'Naga Morich' the concertation of citric acid and ascorbic acid was higher with optimal irrigation. Concentrations of other organic acids were higher at deficit irrigation. C. annuum 'Chili-AS Rot' had higher concentration of ascorbic acid and total phenolic content at optimal irrigation and higher capsaicin and dihydrocapsaicin concentrations in stressed plants. C. chinense 'Naga Morich' had higher concentrations of capsaicin, dihydrocapsaicin and total phenolic content at optimal irrigation regime.

中文翻译：

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灌溉对两种辣椒品种 Capsicum annuum L. 和 Capsicum chinense Jacq 产量及初级和次级代谢产物的影响

摘要 针对温室生产，评估了水分胁迫对植物生长、产量、初级代谢物（糖、有机酸、抗坏血酸）和次级代谢物（总酚含量、辣椒素和二氢辣椒素）积累的影响。对两种辣椒 Capsicum annuum L. var 'Chili-AS Rot' 和 Capsicum chinense Jacq 进行了盆栽试验。var '娜迦莫里奇'。在两种不同的处理下灌溉植物，最佳灌溉或田间容量和亏缺灌溉或 50% 田间容量，这可以被视为干旱胁迫。研究了干旱胁迫对产量（初级和次级代谢物）的数量和质量的影响。亏缺灌溉影响了产量，因为亏缺灌溉时两种辣椒的产量都较低。种 C. chinense 'Naga Morich' 亏缺灌溉使花朵脱落，因此在第三次采摘时未收获果实。在亏缺灌溉下，两种植物物种的糖浓度都较低。在最佳灌溉条件下，C. annuum 'Chili-AS Rot'果实中柠檬酸、草酸、富马酸、奎宁酸等有机酸的浓度较高。两种灌溉处理的苹果酸浓度相似。在 C. chinense Jacq 的果实中。'Naga Morich' 柠檬酸和抗坏血酸的协同作用在最佳灌溉下更高。亏缺灌溉时其他有机酸的浓度较高。C. annuum 'Chili-AS Rot' 在最佳灌溉条件下具有更高浓度的抗坏血酸和总酚含量，并且在受胁迫的植物中具有更高的辣椒素和二氢辣椒素浓度。C。