Institute for Biology I, RWTH Aachen University, Worringer Weg 3, 52074, Aachen, Germany.
Bioeconomy Science Center, c/o Forschungszentrum Jülich GmbH, 52425, Jülich, Germany.
Plant Mol Biol. 2021 Oct;107(3):177-206. doi: 10.1007/s11103-021-01194-0. Epub 2021 Oct 22.
Tomato is one of the most produced crop plants on earth and growing in the fields and greenhouses all over the world. Breeding with known traits of wild species can enhance stress tolerance of cultivated crops. In this study, we investigated responses of the transcriptome as well as primary and secondary metabolites in leaves of a cultivated and a wild tomato to several abiotic stresses such as nitrogen deficiency, chilling or warmer temperatures, elevated light intensities and combinations thereof. The wild species responded different to varied temperature conditions compared to the cultivated tomato. Nitrogen deficiency caused the strongest responses and induced in particular the secondary metabolism in both species but to much higher extent in the cultivated tomato. Our study supports the potential of a targeted induction of valuable secondary metabolites in green residues of horticultural production, that will otherwise only be composted after fruit harvest. In particular, the cultivated tomato showed a strong induction in the group of mono caffeoylquinic acids in response to nitrogen deficiency. In addition, the observed differences in stress responses between cultivated and wild tomato can lead to new breeding targets for better stress tolerance.
番茄是世界上种植量最大的作物之一，在世界各地的田间和温室中都有种植。与野生种的已知特性进行杂交可以提高栽培作物的抗逆性。在这项研究中，我们研究了栽培番茄和野生番茄叶片的转录组以及初级和次级代谢物对多种非生物胁迫（如氮缺乏、冷胁迫或暖温胁迫、高光强以及它们的组合）的响应。与栽培番茄相比，野生种对不同的温度条件有不同的反应。氮缺乏引起的反应最强，特别是在两个物种中诱导了次生代谢，但在栽培番茄中诱导的程度要高得多。我们的研究支持了在园艺生产的绿色残余物中靶向诱导有价值的次生代谢物的潜力，否则这些残余物在果实收获后只能进行堆肥。特别是，在氮缺乏的情况下，栽培番茄中单咖啡酰奎宁酸组强烈诱导。此外，栽培番茄和野生番茄之间观察到的应激反应差异可以为提高应激耐受性提供新的育种目标。
