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    • YUANPING FANG

      Articles written in Journal of Biosciences

    • Volume 46 All articles Published: 3 February 2021 Article ID 0003 Article

      Metabolite profiling of violet, white and pink flowers revealing flavonoids composition patterns in Rhododendron pulchrum Sweet

      SHUZHEN WANG SHIYING HUANG JIE YANG ZHILIANG LI MINGJU ZHANG YUANPING FANG QIAOFENG YANG WEIBIN JIN

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      Flower color is the major characteristics and critical breeding program for most Rhododendron species.However, little is known about their coloration mechanism and color inheritance. In this study, petal pigmentconstituents of three Rhododendron pulchrum Sweet cultivars with different colors were clarified based on LCESI-MS/MS method. Using a broad-targeted metabolomic approach, a total of 149 flavonoids and theirglycosylated or methylated derivatives were identified, including 18 anthocyanins (Pg, Cy, Dp, Pn, Pt, and Mv)and 32 flavonols (mainly kaempferol 3-O-glycosides and quercetin 3-O-glycosides). Moreover, anthocyaninswere mainly represented by anthocyanidin-3-O-glycosides (glucoside, rutinoside, galactoside, and di-glycosides).Flavone and C-glycosylated flavone were major second metabolites responsible for the differenceamong three different R. pulchrum cultivars. The accumulation of total flavonoids displayed a clear phenotypicvariation: cultivars ‘zihe’ and ‘fenhe’ were clustered together, while ‘baihe’ was clustered alone in the HCAanalysis. The composition and content of anthocyanins were more complex in colored flowers (‘zehe’ and

      ‘fenhe’) than in white flower (‘baihe’). This study further enhanced our understanding on the flavonoids profileof flower coloration and will provide biochemical basis for further genetic breeding in Rhododendron species.

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      Forthcoming Special issue.


    • To trigger further research on plant mitochondria, the Journal of Biosciences is bringing out a special issue titled "Plant Mitochondria: Properties and Interactions with Other Organelles".


      Plant mitochondria are quite distinct and have unique features, such as a cyanide-insensitive alternate pathway. They also interact with chloroplasts to optimize photosynthetic carbon assimilation.


      Submissions are welcome until 30 July 2023. The contributions can be original articles, short communications, reviews, or mini-reviews on any topic related to plant mitochondria.


      Authors can submit their articles online at https://www.editorialmanager.com/jbsc/default2.aspx

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