Journal article
Impairment of chloroplast movement reduces growth and delays reproduction ofArabidopsis thalianain natural and controlled conditions
American journal of botany, v 107(9), pp 1309-1318
Sep 2020
PMID: 32965027
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Premise The importance of chloroplast movement for plant growth in constant, controlled light and of nonphotochemical quenching (NPQ) in variable, natural light are known. Here we concurrently investigated growth and reproduction of severalArabidopsis thalianamutants to assess the relative importance of photoprotection via chloroplast movement and NPQ. Methods Plants were grown outdoors (natural conditions) or in a growth chamber with variable light and chilling temperatures (controlled conditions). Phenotypic growth and reproductive variables were determined at set times before maturity in wild-type (WT) andphot1,phot2, phot1phot2(e.g., impaired chloroplast movement, stomatal conductance, leaf flattening),chup1(impaired chloroplast movement), andnpq1(reduced NPQ) plants. Results Mutants were most adversely affected in natural conditions, withphot1phot2andchup1most severely impacted. These mutants bolted later and produced fewer leaves and siliques, less leaf biomass, and fewer secondary inflorescences than WT. In controlled conditions, leaf traits of these mutants were unaffected, butphot1phot2bolted later and produced fewer secondary inflorescences and siliques than WT. For most variables, there were significant interactions between growth conditions and plant genotype. Many variables were correlated, but those relationships changed with growth conditions and genotype. Conclusions Phenotypic variables at the time of the harvest were strongly affected by growth conditions and genotype. In natural conditions,phot1phot2andchup1mutants were most adversely affected, demonstrating the importance of chloroplast movement. In controlled conditions, onlyphot1phot2was consistently affected, also emphasizing the important, pleiotropic effects of phototropins. In both conditions, NPQ was less important.
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Details
- Title
- Impairment of chloroplast movement reduces growth and delays reproduction ofArabidopsis thalianain natural and controlled conditions
- Creators
- Mia M. Howard - Wellesley CollegeAndrea Bae - Wellesley CollegeZahra Pirani - Wellesley CollegeNhi Van - Wellesley CollegeMartina Koniger - Wellesley College
- Publication Details
- American journal of botany, v 107(9), pp 1309-1318
- Publisher
- Wiley
- Number of pages
- 10
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- College of Medicine
- Web of Science ID
- WOS:000571848300001
- Scopus ID
- 2-s2.0-85091301864
- Other Identifier
- 991021860683004721
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Plant Sciences