Variations in chloroplast movement and chlorophyll fluorescence among chloroplast division mutants under light stress
Journal Article
·
· Journal of Experimental Botany
- Michigan State Univ., East Lansing, MI (United States). Dept. of Plant Biiology; MSU
- Michigan State Univ., East Lansing, MI (United States). MSU-DOE Plant Research Laboratory; Michigan State Univ., East Lansing, MI (United States). Dept. of Biochemistry and Molecular Biology
- Michigan State Univ., East Lansing, MI (United States). Dept. of Electrical and Computer Engineering
- Michigan State Univ., East Lansing, MI (United States). MSU-DOE Plant Research Laboratory; Michigan State Univ., East Lansing, MI (United States). Dept. of Computer Sciences and Engineering
- Michigan State Univ., East Lansing, MI (United States). Dept. of Plant Biology
Chloroplasts divide to maintain consistent size, shape, and number in leaf mesophyll cells. Altered expression of chloroplast division proteins in Arabidopsis results in abnormal chloroplast morphology. To better understand the influence of chloroplast morphology on chloroplast movement and photosynthesis, we compared the chloroplast photorelocation and photosynthetic responses of a series of Arabidopsis chloroplast division mutants with a wide variety of chloroplast phenotypes. Chloroplast movement was monitored by red light reflectance imaging of whole plants under increasing intensities of white light. The accumulation and avoidance responses were differentially affected in different mutants and depended on both chloroplast number and morphological heterogeneity. Chlorophyll fluorescence measurements during 5 d light experiments demonstrated that mutants with large-chloroplast phenotypes generally exhibited greater PSII photodamage than those with intermediate phenotypes. No abnormalities in photorelocation efficiency or photosynthetic capacity were observed in plants with small-chloroplast phenotypes. Simultaneous measurement of chloroplast movement and chlorophyll fluorescence indicated that the energy-dependent (qE) and long-lived components of non-photochemical quenching that reflect photoinhibition are affected differentially in different division mutants exposed to high or fluctuating light intensities. We conclude that chloroplast division mutants with abnormal chloroplast morphologies differ markedly from the wild type in their light adaptation capabilities, which may decrease their relative fitness in nature.
- Research Organization:
- Michigan State Univ., East Lansing, MI (United States). MSU-DOE Plant Research Laboratory
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- FG02-06ER15808; FG02-91ER20021
- OSTI ID:
- 1596264
- Journal Information:
- Journal of Experimental Botany, Journal Name: Journal of Experimental Botany Journal Issue: 13 Vol. 68; ISSN 0022-0957
- Publisher:
- Oxford University PressCopyright Statement
- Country of Publication:
- United States
- Language:
- English
In vivo photoprotection mechanisms observed from leaf spectral absorbance changes showing VIS–NIR slow-induced conformational pigment bed changes
|
journal | September 2019 |
Similar Records
Non‐invasive, whole‐plant imaging of chloroplast movement and chlorophyll fluorescence reveals photosynthetic phenotypes independent of chloroplast photorelocation defects in chloroplast division mutants
Effects of reduced amounts of lipid unsaturation on chloroplast ultrastructure and photosynthesis in a mutant of Arabidopsis
Enhanced thermal tolerance of photosynthesis and altered chloroplast ultrastructure in a mutant of Arabidopsis deficient in lipid desaturation
Journal Article
·
Wed Oct 07 20:00:00 EDT 2015
· The Plant Journal
·
OSTI ID:1401632
Effects of reduced amounts of lipid unsaturation on chloroplast ultrastructure and photosynthesis in a mutant of Arabidopsis
Journal Article
·
Mon Jun 01 00:00:00 EDT 1987
· Plant Physiol.; (United States)
·
OSTI ID:5900700
Enhanced thermal tolerance of photosynthesis and altered chloroplast ultrastructure in a mutant of Arabidopsis deficient in lipid desaturation
Journal Article
·
Sat Jul 01 00:00:00 EDT 1989
· Plant Physiology; (USA)
·
OSTI ID:7066345