
TY  - JOUR
A1  - Matsubara, Shizue 
A1  - Gilmore, Adam M. 
A1  - Osmond, C. Barry 
T1  - Diurnal and acclimatory responses of violaxanthin and lutein epoxide in the Australian mistletoe <emph type="2">Amyema miquelii</emph>
JF  - Functional Plant Biology
JO  - Functional Plant Biol.
Y1  - 2001
VL  - 28
IS  - 8
SP  - 793
EP  - 800
KW  - 
UR  - https://doi.org/10.1071/PP01031 
N2  - 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. 
ER  -

