Effects of abscisic acid, jasmonic acid and salicylic acid on the content of phytochemicals and their gene expression profiles and biological activity in turnip (Brassica rapa ssp. rapa)

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• 作者：Muthu Thiruvengadam ; Venkitasamy Baskar ; Seung-Hyun Kim…
• 关键词：Antioxidants ; Antimicrobial ; Gene expression ; Glucosinolates ; Phenolic compounds ; Turnip
• 刊名：Plant Growth Regulation
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：80
• 期：3
• 页码：377-390
• 全文大小：1,466 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Physiology
  
• 出版者：Springer Netherlands
• ISSN：1573-5087
• 卷排序：80

文摘

Turnip (Brassica rapa ssp. rapa) is an important vegetable crop and produces valuable health-promoting phytochemicals which have been used for their nutraceutical value. The exogenous effects of abscisic acid (ABA), jasmonic acid (JA) and salicylic acid (SA) on the contents of glucosinolate, individual and total phenolic compound, carotenoid, chlorophyll and anthocyanin content and their gene regulation of metabolic biosynthesis, as well as antioxidant and antimicrobial activities were studied in turnip plants. The JA treatments significantly increased the amount of glucobrassicin, 4-methoxyglucobrassicin, neoglucobrassicin and 4-hydroxyglucobrassicin. Gluconasturtiin content was considerably increased by ABA treatment. Glucoallysin, sinigrin, progoitrin, gluconapin and glucobrassicanapin were highly increased in SA-treated plants. The content of lutein was higher in ABA and SA-treated plants compared with that in control plants. Carotenoid, chlorophyll and anthocyanin contents were significantly increased with ABA, JA and SA treatment. Individual phenolic (flavonols, hydroxycinnamic and hydroxybenzoic acids) and total phenolic, flavonoid content, antioxidant and antimicrobial activity were noticeably increased in ABA, JA and SA-treated plants. Furthermore, ABA, JA and SA-treated plants exhibited significantly increased expression of genes associated with the phytochemical production. Our results proved that ABA, JA and SA did significantly increase the concentration of health-benefiting phytochemicals and also increased biological activity in turnip plants.