
%0 Journal Article
%A Matsubara, Shizue 
%A Gilmore, Adam M. 
%A Osmond, C. Barry 
%T Diurnal and acclimatory responses of violaxanthin and lutein epoxide in the Australian mistletoe <emph type="2">Amyema miquelii</emph>
%J Functional Plant Biology
%D 2001/08/06
%V 28
%N 8
%P 793-800
%K 
%R https://doi.org/10.1071/PP01031
%U https://www.publish.csiro.au/paper/PP01031 
%X This study investigated the chloroplast pigment content of the Australian mistletoe Amyema miquelii (Lehm. ex Miq.) Tiegh. over diurnal periods in sun- and shade-acclimated leaves. Amyema miquelii exhibited the typical higher plant complement of neoxanthin, the xanthophyll cycle pigments, lutein, chlorophylls a and b and &#946; carotene. Substantial levels of lutein epoxide were also present. Interestingly, diurnal light exposure elicited a decrease in lutein epoxide that paralleled the decrease in violaxanthin. Compared with shade-acclimated leaves, sun leaves exhibited reduced lutein epoxide and violaxanthin levels and higher chlorophyll a/b ratios. It is clear that the pools of violaxanthin and lutein epoxide respond in parallel to both diurnal light changes and sun&#8211;shade acclimation, although there seemed to be some differences in the recovery characteristics. These results raise a question as to whether lutein and lutein epoxide cycling may provide an auxiliary means of energy dissipation for some species. 
