Does the accumulation of anthocyanins protect the plant against photoinhibition?

Kestutis Bargaila, Lulu Zhang, Marija Cekaliovaite, Paula Melo Paulon Hansen, Stine Hesselholt Sloth & Xiaoting Zhang

Studenteropgave: Semesterprojekt

Abstrakt

The aim of this second semester project is to find out whether the pigment anthocyanin (a pigment responsible for the vermilion in plants) offers plants, any protection against Photoinhibition. The plant called Gaultheria miqueliana has been chosen to be the object of study of this project because it has characteristics, which are important for the beginning of the project - green and red leaves. The plants were exposed to different light intensities and afterwards the electron transport rates from different leaves were measured with the help of the chlorophyll fluorometer; and the colors reflected by those leaves were measured with a spectrophotometer. Anthocyanin content was measured in a non destructive way by using the following formula: ARI= 1/R550 -1/R700, where R550 and R700 mean the reflectance at 550nm and 700 nm respectively (Gitelson, et. al, 2001). To prove that anthocyanins are present in the leaves, we have extracted them and measured the absorbance of anthocyanins at 530nm. The photoprotective role attributed to anthocyanins was weakly confirmed with graph 6, but just in young red leaves.

UddannelserBasis - International Naturvidenskabelig Bacheloruddannelse, (Bachelor uddannelse) Basis
SprogEngelsk
Udgivelsesdato26 jun. 2008
VejledereSøren Laurentius Nielsen

Emneord

  • Photoinhibition
  • Anthocyanins