Abstract
The regulation by light of the photosynthetic apparatus and specifically the composition of light-harvesting complexes in mesophyll and bundle sheath chloroplasts was investigated in the C4 plants: Zea mays (NADP-ME type), Panicum miliaceum (NAD-ME type) and Panicum maximum (PEP-CK type). Chloroplasts ultrastructure, chlorophyll contents, fluorescence analysis, PQ level, transcripts accumulation, amount of thylakoid proteins and Lhc polypeptides were determined for plants grown under high, moderate and low irradiance. Results demonstrate that mesophyll and bundle sheath chloroplasts of plants grown under the same light conditions differ significantly with respect to the amount of light-harvesting complexes. However, Z. mays leaves acclimation to different light caused changes in LHCII complexes in both types of chloroplasts, while in both Panicum species the abundance of LHC proteins was similarly affected although some changes occurred at the chloroplast organizational level.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
