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Short-term phosphorus deficiency induces flavonoid accumulation in the lamina of pak choi: A finishing treatment that influences inner quality

文献类型： 外文期刊

作者： Waqas, Muhammad 1 ; Wang, Li 2 ; Jones, Jeffrey J. 3 ; Turetschek, Reinhard Josef 4 ; Engelmeier, Doris 5 ; Geilfus, Christoph-Martin 1 ; Koch, Mirjam 6 ;

作者机构： 1.Hsch Geisenheim Univ, Dept Soil Sci & Plant Nutr, Von Lade Str 1, D-65366 Geisenheim, Germany

2.Shandong Acad Agr Sci, Inst Agr Resources & Environm, Jinan 250100, Peoples R China

3.Humboldt Univ, Albrecht Daniel Thaer Inst Agr & Hort Sci, Fac Life Sci, Dept Biosyst Engn, Albrecht Thaer Weg 1, D-14195 Berlin, Germany

4.AGRANA Res & Innovat Ctr GmbH, Dept Sugar Technol, Josef Reither Str 21-23, A-3430 Tulln, Austria

5.Univ Wien, Dept Funktionelle Evolutionare Okol, Djerassipl 1, A-1030 Vienna, Austria

6.Hsch Geisenheim Univ, Dept Appl Ecol, Von Lade Str 1, D-65366 Geisenheim, Germany

关键词： Quercetin; Kaempferol; Reactive oxygen species; Oxidative stress

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.3； 五年影响因子：4.5 ）

ISSN： 0304-4238

年卷期： 2023 年 314 卷

页码：

收录情况： SCI

摘要： Plants that suffer phosphorus (P) deficiency acclimate to these inconvenient conditions by synthesizing flavonoids. These metabolites have features that are useful to withstand a mild P deficiency, e.g. antioxidative properties for reactive oxygen species scavenging. Moreover, flavonoid accumulation in photosynthetically active leaf tissue shields the chloroplasts from excessive light energy, doing so by intercepting photons. This is relevant because lack of P feedback inhibits photosynthetic electron transport chain, a process that would give rise to toxic amounts of reactive oxygen species. The idea of the presented study was to subject pak choi to a short P deficiency in order to induce accumulation of the human health-promoting flavonoids a few days before harvest. Pak choi was selected because it is a widely consumed leafy vegetable that has the genetic capacity to synthesize flavonoids. First, plants were hydroponically cultivated with sufficient P. Eight days before harvest, P was omitted from the nutrient solution. In result, the lamina of fully-grown harvested leaf enriched in eight flavonoids, among them quercetin, kaempferol and flavone structures. However, the entire shoot lost water. This is a problem because this means a reduction of marketable yield. Of note, P concentrations were not yet reduced in the lamina of the fully-grown harvested leaf that accumulated the flavonoids. This is indicatory for systemic stress signals that transmit information for example of a P deprivation to distant tissue.

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