TY - JOUR
T1 - Photosynthesis in Arabidopsis thaliana mutants with reduced chloroplast number
AU - Austin, Jotham
AU - Webber, Andrew
N1 - Funding Information:
This work was support by a fellowship to JA from NSF GRT Grant Number DGE-9553456.
PY - 2005/9
Y1 - 2005/9
N2 - We have used a class of Arabidopsis mutants altered in the accumulation and replication of chloroplasts (arc mutants) to investigate the effect of reduced chloroplast number on the photosynthetic competence of leaves. Each of the arc mutants examined (arc3, arc5, and arc6) accumulate only a few (2-15) large chloroplasts per mesophyll cell [K.A. Pyke and R.M. Leech (1992) Plant Physiology 99: 1005-1008]. The increased plastid size maintains a constant plastid to mesophyll cell volume, which has been suggested to compensate for the lower chloroplast number. In fact, we find that reduced chloroplast number has an effect on both the composition and structure of the photosynthetic apparatus, and that each arc mutant has an altered photosynthetic capacity, and we conclude that photosynthetic competence is dependent on proper chloroplast division and development.
AB - We have used a class of Arabidopsis mutants altered in the accumulation and replication of chloroplasts (arc mutants) to investigate the effect of reduced chloroplast number on the photosynthetic competence of leaves. Each of the arc mutants examined (arc3, arc5, and arc6) accumulate only a few (2-15) large chloroplasts per mesophyll cell [K.A. Pyke and R.M. Leech (1992) Plant Physiology 99: 1005-1008]. The increased plastid size maintains a constant plastid to mesophyll cell volume, which has been suggested to compensate for the lower chloroplast number. In fact, we find that reduced chloroplast number has an effect on both the composition and structure of the photosynthetic apparatus, and that each arc mutant has an altered photosynthetic capacity, and we conclude that photosynthetic competence is dependent on proper chloroplast division and development.
KW - Arabidopsis
KW - Arc mutants
KW - Chloroplast division
KW - Chloroplast movement
KW - Photosynthetic competence
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U2 - 10.1007/s11120-005-7708-x
DO - 10.1007/s11120-005-7708-x
M3 - Article
C2 - 16170638
AN - SCOPUS:25444502871
SN - 0166-8595
VL - 85
SP - 373
EP - 384
JO - Photosynthesis research
JF - Photosynthesis research
IS - 3
ER -